Subject term: Fourier transform infrared spectroscopy and melting

1. 027 Temperature-dependent tolerance to hypotonic stress and cryosurvival of stallion sperm

Author:: Harriette Oldenhof; Anna Heutelbeck; Willem F. Wolkers; Harald Sieme
Source:: Cryobiology 2013 v.67 no.3 pp. 406
ISSN:: 0011-2240
Subject:: Fourier transform infrared spectroscopy; cholesterol; cold tolerance; computers; cryopreservation; cryoprotectants; flow cytometry; freezing; melting; membrane fluidity; osmolality; osmotic stress; osmotolerance; plasma membrane; sodium chloride; sperm motility; spermatozoa; stallions; temperature; thawing
Abstract:: ... Success rates for cryopreservation of equine sperm show a large variation among individual stallions. Factors that have been implicated with this inter-male variation in cryosurvival are the ability of sperm to tolerate osmotic stress, and temperature-induced changes in membrane phase state and organization. Cells are exposed to osmotic stress both upon the addition of cryoprotective agents as wel ...
DOI:: 10.1016/j.cryobiol.2013.09.033
: https://doi.org/10.1016/j.cryobiol.2013.09.033

2. 2,2,2-Trifluoroethanol disrupts the triple helical structure and self-association of type I collagen

Author:: Ganesh Shanmugam; Samala Murali Mohan Reddy; Venkatachalam Natarajan; Balaraman Madhan
Source:: International journal of biological macromolecules 2013 v.54 no. pp. 155-159
ISSN:: 0141-8130
Subject:: Fourier transform infrared spectroscopy; absorption; biocompatible materials; collagen; connective tissues; drug delivery systems; melting; peptides; structural proteins; tissue engineering; turbidity
Abstract:: ... Collagen, a fibrous structural protein, is a major component of skin, tendon, bone, and other connective tissues. Collagen is one of the dominant biomaterials used for tissue engineering and drug delivery applications. 2,2,2-Trifluoroethanol (TFE) has been used as a co-solvent in the preparation of collagen based biomaterials, which are used for tissue engineering applications. However, the basic ...
DOI:: 10.1016/j.ijbiomac.2012.12.014
: https://doi.org/10.1016/j.ijbiomac.2012.12.014

3. 3D structure fungi-derived carbon stabilized stearic acid as a composite phase change material for thermal energy storage

Author:: Chuanchang Li; Baoshan Xie; Zhangxing He; Jian Chen; Yi Long
Source:: Renewable energy 2019 v.140 pp. 862-873
ISSN:: 0960-1481
Subject:: Fourier transform infrared spectroscopy; Raman spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; carbon; carbonization; enthalpy; freezing; melting; moieties; renewable energy sources; stearic acid; surface area; thermal conductivity; thermal energy; thermal stability
Abstract:: ... Stearic acid (SA)/fungi-derived carbon (FDC) composite phase change materials (PCM) were fabricated by vacuum impregnation, where three types of FDC (FDC-C, FDC-H, and FDC-K) as carrier were synthesized by diverse synthetic procedures of carbonization. The FDC-K modified by synergistic hydrothermal and KOH-assisted calcination process had a 3D-cellular structure with considerably higher inner surf ...
DOI:: 10.1016/j.renene.2019.03.121
: https://doi.org/10.1016/j.renene.2019.03.121

4. 5-Carboxylcytosine and Cytosine Protonation Distinctly Alter the Stability and Dehybridization Dynamics of the DNA Duplex

Author:: Brennan Ashwood; Paul J. Sanstead; Qing Dai; Chuan He; Andrei Tokmakoff
Source:: Journal of physical chemistry 2019 v.124 no.4 pp. 627-640
ISSN:: 1520-5207
Subject:: DNA; Fourier transform infrared spectroscopy; Gibbs free energy; cytosine; dissociation; epigenetics; kinetics; melting; models; moieties; nanotechnology; nucleic acid hybridization; oligonucleotides; pH; physical properties; protonation
Abstract:: ... Applications associated with nucleobase protonation events are grounded in their fundamental impact on DNA thermodynamics, structure, and hybridization dynamics. Of the canonical nucleobases, N3 protonation of cytosine (C) is the most widely utilized in both biology and nanotechnology. Naturally occurring C derivatives that shift the N3 pKₐ introduce an additional level of tunability. The epigenet ...
DOI:: 10.1021/acs.jpcb.9b11510
PubMed:: 31873021
PubMed Central:: PMC7109620
: https://doi.org/10.1021/acs.jpcb.9b11510

5. 9-O-N-aryl/arylalkyl amino carbonyl methyl substituted berberine analogues induce self-structure in polyadenylic acid

Author:: Anirban Basu; Parasuraman Jaisankar; Gopinatha Suresh Kumar
Source:: RSC advances 2012 v.2 no.20 pp. 7714-7723
ISSN:: 2046-2069
Subject:: Fourier transform infrared spectroscopy; aromatic compounds; berberine; binding capacity; calorimetry; circular dichroism spectroscopy; enthalpy; entropy; melting; temperature
Abstract:: ... This manuscript describes the interaction of 9-O-substituted analogues of the plant alkaloid berberine with single stranded (ss) poly(A). Three new analogues of berberine with aryl/arylalkyl amino carbonyl methyl substituents at the 9-position of the isoquinoline chromophore were evaluated for their binding to ss poly(A) by a wide variety of biophysical techniques. The results indicated that these ...
DOI:: 10.1039/c2ra20841e
: https://doi.org/10.1039/c2ra20841e

6. A Facile and Efficient Method for Preparing Chain Extended Poly(lactic acid) Foams with High Volume Expansion Ratio

Author:: Yang Li; Hongfu Zhou; Bianying Wen; Yajun Chen; Xiangdong Wang
Source:: Journal of polymers and the environment 2020 v.28 no.1 pp. 17-31
ISSN:: 1566-2543
Subject:: Fourier transform infrared spectroscopy; biocompatibility; carbon dioxide; composite polymers; cooling; crystal structure; crystallization; differential scanning calorimetry; ethylene; foaming; foams; gels; melting; polylactic acid; temperature; torque; viscoelasticity; viscosity
Abstract:: ... In recent years, poly(lactic acid) (PLA) foams have drawn considerable attention worldwide due to their environmental friendliness and excellent biocompatibility. However, it was a big challenge to prepare PLA foams with high volume expansion ratio owing to their poor crystallization properties and melt strength. In this work, the random copolymer of ethylene and glycidyl methacrylate as an effici ...
DOI:: 10.1007/s10924-019-01572-2
: https://doi.org/10.1007/s10924-019-01572-2

7. A Novel Bio-based Polyaspartic Acid Copolymer: Synthesis, Structure and Performance of Degradation

Author:: Xiao-mei Wang; Hao-hao Ren; Yong-gang Yan; Mi-zhi Ji
Source:: Journal of polymers and the environment 2018 v.26 no.11 pp. 4201-4210
ISSN:: 1566-2543
Subject:: Fourier transform infrared spectroscopy; X-ray diffraction; alanine; aspartic acid; composite polymers; culture media; gamma-aminobutyric acid; melting; pH; phenylalanine; phosphates; polymerization; raw materials; scanning electron microscopy; sodium chloride; soil; trypsin; viscosity; weight loss
Abstract:: ... A novel bio-based polyaspartic acid copolymer, as a multifunctional polymer was fabricated via in-site melting polymerization method using L-aspartic acid, γ-aminobutyric acid, L-phenylalanine and L-alanine as raw materials. The synthetic conditions were studied in detail, and the structure and degradation assays of these copolymers were investigated by FT-IR, XRD, weight loss rate, pH values, int ...
DOI:: 10.1007/s10924-018-1293-5
: https://doi.org/10.1007/s10924-018-1293-5

8. A Novel Biodegradable Green Poly(L: -Aspartic Acid-Citric Acid) Copolymer for Antimicrobial Applications

Author:: N. Mithil Kumar; K. Varaprasad; K. Madhusudana Rao; A. Suresh Babu; M. Srinivasulu; S. Venkata Naidu
Source:: Journal of polymers and the environment 2012 v.20 no.1 pp. 17-22
ISSN:: 1566-2543
Subject:: X-ray diffraction; aspartic acid; antibiotics; absorption; composite polymers; polymerization; melting; differential scanning calorimetry; Fourier transform infrared spectroscopy; biodegradability; citric acid; Pseudomonas; bacteria; antibacterial properties
Abstract:: ... Poly (L: -aspartic acid-citric acid) green copolymers were developed using thermal polymerization of aspartic acid (ASP) and citric acid (CA) followed by direct bulk melt condensation technique. Antibacterial properties of copolymer of aspartic acid based were investigated as a function of citric acid content. This study is focused on the microorganism inhibition performance of aspartic acid based ...
DOI:: 10.1007/s10924-011-0335-z
: https://doi.org/10.1007/s10924-011-0335-z

9. A Novel Bioresidue to Compatibilize Sodium Montmorillonite and Linear Low Density Polyethylene

Author:: Bjarke Høgsaa; Ellie H. Fini; Jesper de Claville Christiansen; Albert Hung; Masoumeh Mousavi; Erik Appel Jensen; Farideh Pahlavan; Thomas H. Pedersen; Catalina-Gabriela Sanporean
Source:: Industrial & engineering chemistry process design and development 2018 v.57 no.4 pp. 1213-1224
ISSN:: 1520-5045
Subject:: Fourier transform infrared spectroscopy; X-ray diffraction; biomass; clay; mechanical properties; melting; models; montmorillonite; nanocomposites; polyethylene; process design; reflectance; rheometry; screening; solubility; thermal stability; thermogravimetry; transmission electron microscopy; wastes
Abstract:: ... Despite the improved thermal stability and mechanical properties of polymer–clay nanocomposites compared to pure polymeric materials, creating nanocomposites with enhanced thermomechanical properties requires a good compatibility and dispersion of the clay within the polymeric matrix. This paper introduces a bioresidue extracted from waste biomass to modify montmorillonite clay to compatibilize it ...
DOI:: 10.1021/acs.iecr.7b04178
: https://doi.org/10.1021/acs.iecr.7b04178

10. A Recycling-Focused Assessment of the Oxidative Thermomechanical Degradation of HDPE Melt Containing Pro-oxidant

Author:: Alex S. Babetto; Marcela C. Antunes; Sílvia H. P. Bettini; Baltus C. Bonse
Source:: Journal of polymers and the environment 2020 v.28 no.2 pp. 699-712
ISSN:: 1566-2543
Subject:: Fourier transform infrared spectroscopy; aldehydes; biodegradability; biodegradation; ketones; lubricants; manganese; melting; moieties; molecular weight; polyethylene; recycling; rheometers; rheometry; stearic acid; thermoplastics; torque
Abstract:: ... This study shows the effect of a pro-oxidant (oxo-biodegradable) additive on the oxidative thermomechanical degradation of high-density polyethylene (HDPE). It also allows us to predict the behavior of the material when subjected to mechanical recycling or to biodegradation. When HDPE, one of the most consumed thermoplastics worldwide, is transformed into a product or when subjected to primary and ...
DOI:: 10.1007/s10924-019-01641-6
: https://doi.org/10.1007/s10924-019-01641-6

11. A THEIC-based polyphosphate melamine intumescent flame retardant and its flame retardancy properties for polylactide

Author:: Xuan Zhao; Shang Gao; Gousheng Liu
Source:: Journal of analytical and applied pyrolysis 2016 v.122 pp. 24-34
ISSN:: 0165-2370
Subject:: Fourier transform infrared spectroscopy; X-ray photoelectron spectroscopy; calorimetry; combustion; flame retardants; melamine; melting; nuclear magnetic resonance spectroscopy; oxygen; phosphorus; polylactic acid; pyrolysis; scanning electron microscopy; stable isotopes; thermal stability
Abstract:: ... A macromolecular intumescent flame retardant tris(2-hydroxyethyl) isocyanurate polyphosphate melamine (TPM) was synthesized, its structure was confirmed by Fourier transform infrared spectroscopy (FTIR), 1H and 31P nuclear magnetic resonances (NMR). The flame retardancy and combustion properties of PLA/TPM composites were evaluated by limiting oxygen index (LOI), UL-94, and cone calorimetry tests. ...
DOI:: 10.1016/j.jaap.2016.10.029
: https://doi.org/10.1016/j.jaap.2016.10.029

12. A correlation between formation enthalpy and ionic conductivity in perovskite-structured Li₃ₓLa₀.₆₇₋ₓTiO₃ solid lithium ion conductors

Author:: Xin Guo; Pardha Saradhi Maram; Alexandra Navrotsky
Source:: Journal of materials chemistry A 2017 v.5 no.25 pp. 12951-12957
ISSN:: 2050-7496
Subject:: Fourier transform infrared spectroscopy; X-ray diffraction; activation energy; calorimetry; enthalpy; heat production; lanthanum; lithium; melting; metal ions; oxides; oxygen; temperature
Abstract:: ... Perovskite-structured lithium lanthanum titanate (LLTO) Li₃ₓLa₀.₆₇₋ₓTiO₃ (compositions x = 0.04 to 0.15) has been prepared by conventional solid state reaction. The phase purity and crystal structural changes were investigated with XRD, FTIR and Raman. The vibrational spectra reveal the interaction between metal cation and oxygen anion with increasing Li doping and structural evolution. LLTO and c ...
DOI:: 10.1039/c7ta02434g
: https://doi.org/10.1039/c7ta02434g

13. A facile method for the production of SnS thin films from melt reactions

Author:: Mundher Al-Shakban; Zhiqiang Xie; Nicky Savjani; M. Azad Malik; Paul O’Brien
Source:: Journal of materials science 2016 v.51 no.13 pp. 6166-6172
ISSN:: 0022-2461
Subject:: Fourier transform infrared spectroscopy; Raman spectroscopy; X-radiation; energy-dispersive X-ray analysis; heat; melting; scanning electron microscopy; temperature; thermogravimetry; tin
Abstract:: ... Tin(II)O-ethylxanthate [Sn(S₂COEt)₂] was prepared and used as a single-source precursor for the deposition of SnS thin films by a melt method. Polycrystalline, (111)-orientated, orthorhombic SnS films with controllable elemental stoichiometries (of between Sn₁.₃S and SnS) were reliably produced by selecting heating temperatures between 200 and 400 °C. The direct optical band gaps of the SnS films ...
DOI:: 10.1007/s10853-016-9906-7
: https://doi.org/10.1007/s10853-016-9906-7

14. A facile, fast, and low-cost method for fabrication of micro/nano-textured superhydrophobic surfaces

Author:: Amir R. Esmaeili; Noshin Mir; Reza Mohammadi
Source:: Journal of colloid and interface science 2020 v.573 pp. 317-327
ISSN:: 0021-9797
Subject:: Fourier transform infrared spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; air; coatings; confocal laser scanning microscopy; contact angle; dipping; droplets; ethanol; glass; heat; hydrophobicity; melting; paper; pulp and paper industry; scanning electron microscopy; solidification; temperature
Abstract:: ... Alkyl ketene dimer (AKD) is frequently used in paper industry as an inexpensive sizing agent. The formation of a porous structure after curing the solidified AKD for an extra-long time (4–6 days) results in superhydrophobicity. In this study, a facile and low-cost method was utilized to turn the surface of AKD superhydrophobic in a very short period of time.We fabricated superhydrophobic coatings ...
DOI:: 10.1016/j.jcis.2020.04.027
: https://doi.org/10.1016/j.jcis.2020.04.027

15. A kinked unit-containing thermotropic liquid crystalline copolyester with low glass transition temperature and broad phase transition temperature

Author:: Huang, Heng-Zhen; Chen, Li; Wang, Yu-Zhong
Source:: Journal of polymer science 2009 v.47 no.18 pp. 4703-4709
ISSN:: 0887-624X
Subject:: 4-hydroxybenzoic acid; Fourier transform infrared spectroscopy; X-ray diffraction; carbon; chemical structure; differential scanning calorimetry; glass transition temperature; light microscopy; mechanical properties; melting; nuclear magnetic resonance spectroscopy; polyesters; stable isotopes; thermal properties; thermogravimetry; transesterification
Abstract:: ... A novel phosphorus-containing thermotropic liquid crystalline copolyester with kinked unit named as poly(hydroxybenzate-co-DOPO-benzenediol dihydrodipheyl ether terephthalate) (PHDDT) was synthesized successfully by melting transesterification from terephthalic acid (TPA), p-hydroxybenzoic acid (p-ABH), 2-(6-oxid-6H-dibenz(c, e) (1,2) oxaphosphorin 6-yl)1,4-benzenediol (DOPO-HQ), and 4,4'-dihydrox ...
DOI:: 10.1002/pola.23524
: https://doi.org/10.1002/pola.23524

16. A n-octadecane/hierarchically porous TiO2 form-stable PCM for thermal energy storage

Author:: Chaoen Li; Hang Yu; Yuan Song; Meng Wang; Zhiyuan Liu
Source:: Renewable energy 2020 v.145 pp. 1465-1473
ISSN:: 0960-1481
Subject:: Fourier transform infrared spectroscopy; X-ray diffraction; adsorption; chemical bonding; crystallization; desorption; enthalpy; latent heat; melting; nanopores; renewable energy sources; scanning electron microscopy; surface tension; thermal conductivity; thermal energy; titanium dioxide; transmission electron microscopes
Abstract:: ... For a phase-change material (PCM) confined in a porous structure, the interfacial interactions between the PCM and the porous skeleton are the decisive factors in latent heat storage performance. In this work, a novel composite PCM based on hierarchically porous TiO₂ and n-octadecane was successfully synthesized. The porous TiO₂ was prepared by a soft-template method, and the composite PCM was fab ...
DOI:: 10.1016/j.renene.2019.06.070
: https://doi.org/10.1016/j.renene.2019.06.070

17. A new strategy for preparation of long-chain branched polypropylene via reactive extrusion with supercritical CO2 designed for an improved foaming approach

Author:: Kun Wang; Shusheng Wang; Fei Wu; Yongyan Pang; Wei Liu; Wentao Zhai; Wenge Zheng
Source:: Journal of materials science 2016 v.51 no.5 pp. 2705-2715
ISSN:: 0022-2461
Subject:: Fourier transform infrared spectroscopy; carbon dioxide; chemical structure; extrusion; foaming; melting; polypropylenes; temperature; viscosity
Abstract:: ... A novel strategy was designed for the preparation of a long-chain branched polypropylene (PP) with improved foamability via reactive extrusion in the presence of supercritical CO₂ (scCO₂). Benzoyl peroxide was used as a radical initiator and trimethylolpropane triacrylate (TMPTA) was applied as a polyfunctional reactive monomer during extrusion. Fourier transform infrared spectroscopy and high tem ...
DOI:: 10.1007/s10853-015-9584-x
: https://doi.org/10.1007/s10853-015-9584-x

18. A novel Schiff-base polyphosphate ester: Highly-efficient flame retardant for polyurethane elastomer

Author:: Ai-Hua Yang; Cong Deng; Hong Chen; Yun-Xia Wei; Yu-Zhong Wang
Source:: Polymer Degradation and Stability 2017 v.144 pp. 70-82
ISSN:: 0141-3910
Subject:: Fourier transform infrared spectroscopy; Raman spectroscopy; X-ray photoelectron spectroscopy; calorimetry; chromatography; combustion; condensation reactions; flame retardants; gases; heat; mass spectrometry; melting; oxygen; polyurethanes; schiff bases; temperature; thermal stability; thermogravimetry; thermoplastics
Abstract:: ... A novel Schiff-base polyphosphate ester (SPE) flame retardant was synthesized through melt polycondensation, and used to flame retard thermoplastic polyurethane elastomer (TPU). The SPE possessed high thermal stability and rich char residue under high temperature according to the thermogravimetric (TG) analysis. In combustion tests, the flame-retarded TPU passed the UL-94 V-0 rating, and had a lim ...
DOI:: 10.1016/j.polymdegradstab.2017.08.007
: https://doi.org/10.1016/j.polymdegradstab.2017.08.007

19. A novel biodegradable phosphorus-containing copolyester with preferable flame retardancy and mechanical properties

Author:: Tian-Xiang Jin; Xian-Yin Zhang; Yun-Feng Tao; Dan Wang; Feng Chen; Qiang Fu
Source:: RSC advances 2015 v.5 no.75 pp. 61364-61370
ISSN:: 2046-2069
Subject:: Fourier transform infrared spectroscopy; biodegradability; burning; butanediol; chemical structure; composite polymers; esterification; mechanical properties; melting; molecular weight; nuclear magnetic resonance spectroscopy; phosphorus; polyesters; succinic acid; temperature
Abstract:: ... Phosphorus-containing poly(butylene succinate-co-3-hydroxyphenylphosphinyl-propionate) (PBSH) was synthesized through esterification and melt copolycondensation of succinic acid (SA), 1,4 butanediol (BD) and 3-hydroxyphenylphosphinyl-propionic acid (HPPPA). The chemical structure of PBSH was confirmed using Fourier transform infrared spectroscopy (FTIR) and ¹H NMR spectroscopy. It is found that th ...
DOI:: 10.1039/c5ra11390c
: https://doi.org/10.1039/c5ra11390c

20. A novel efficient halogen-free flame retardant system for polycarbonate

Author:: Zhi Hu; Li Chen; Bin Zhao; Yuan Luo; De-Yi Wang; Yu-Zhong Wang
Source:: Polymer degradation and stability 2011 v.96 no.3 pp. 320-327
ISSN:: 0141-3910
Subject:: Fourier transform infrared spectroscopy; X-ray diffraction; burning; calorimeters; chemical structure; flame retardants; heat; melting; montmorillonite; nitrogen; oxygen; phosphorus; rheological properties; silicon; siloxanes; temperature; thermal degradation; thermal stability; thermogravimetry
Abstract:: ... A novel silicon- and phosphorus-containing flame retardant, poly (9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide siloxane), P(DOPO-VTES) was synthesized from 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide(DOPO) and vinyltriethoxy silane(VTES). Its chemical structure was confirmed by FTIR. The thermal gravimetrical analysis (TGA) showed that P(DOPO-VTES) had good thermal stability and a hig ...
DOI:: 10.1016/j.polymdegradstab.2010.03.005
: https://doi.org/10.1016/j.polymdegradstab.2010.03.005

21. A novel melt stable and high tensile strength biopolymer (polyhydroxyalkanoates) from Bacillus megaterium (MTCC10086) and its characterization

Author:: Limpon Bora; Reshmi Das; Dibakar Gohain
Source:: Journal of basic microbiology 2014 v.54 no.9 pp. 1012-1016
ISSN:: 0233-111X
Subject:: Bacillus megaterium; Fourier transform infrared spectroscopy; X-ray diffraction; calorimeters; melting; polyethylene; polyhydroxyalkanoates; polypropylenes; tensile strength
Abstract:: ... In the present investigation, we have defined a novel biopolymer from Bacillus megaterium strain with novel melt stability, high tensile strength, and elongation to break properties higher to polypropylene and similar to polyethylene the polymers available commercially. The polymer was characterized with FTIR and XRD. The percent crystalinity was found to 44.09% with tensile strength 42 (Mpa) and ...
DOI:: 10.1002/jobm.201300277
: https://doi.org/10.1002/jobm.201300277

22. A novel phthalonitrile monomer with low post cure temperature and short cure time

Author:: Liping Sheng; Changping Yin; Jiayu Xiao
Source:: RSC advances 2016 v.6 no.27 pp. 22204-22212
ISSN:: 2046-2069
Subject:: Fourier transform infrared spectroscopy; Lewis bases; absorption; differential scanning calorimetry; enthalpy; melting; nuclear magnetic resonance spectroscopy; polymerization; polymers; resins; temperature; thermal stability; thermogravimetry; viscosity
Abstract:: ... To depress the post cure temperature and time, 3-(2-aminophenoxy)-phthalonitrile (3-APN) was designed and synthesized via the nucleophilic displacement reaction of 3-nitrophthalonitrile and o-aminophenol. The structure of the desired product (3-APN) was confirmed by H nuclear magnetic resonance (NMR) and Fourier transform infrared spectroscopy (FTIR). The polymers from the monomer were also charac ...
DOI:: 10.1039/c5ra25431k
: https://doi.org/10.1039/c5ra25431k

23. A novel polynary fatty acid/sludge ceramsite composite phase change materials and its applications in building energy conservation

Author:: Hongtao He; Pin Zhao; Qinyan Yue; Baoyu Gao; Dongting Yue; Qian Li
Source:: Renewable energy 2015 v.76 pp. 45-52
ISSN:: 0960-1481
Subject:: Fourier transform infrared spectroscopy; ambient temperature; chemical structure; differential scanning calorimetry; durability; energy conservation; enthalpy; equations; fatty acids; melting; melting point; microstructure; models; renewable energy sources; scanning electron microscopes; scanning electron microscopy; seepage; sludge; spectrometers; thermal properties
Abstract:: ... The preparation and characteristics of a composite phase change material (PCM) produced by incorporating polynary fatty acid eutectic mixture into sludge ceramsite were studied. According to Schröeder–Van Laar equation, five different kinds of polynary fatty acid eutectic mixture were prepared, and one of them, suitable for regulating room temperature, was absorbed into sludge ceramsite by vacuum ...
DOI:: 10.1016/j.renene.2014.11.001
: https://doi.org/10.1016/j.renene.2014.11.001

24. A novel supramolecular polymer fabricated via stronger hydrogen-bonding interactions between substituted amide groups: design, synthesis, properties and mechanism

Author:: Ze-Hui Dai; Lu Qiang; Li-ming Tang; Bao-Hua Guo
Source:: RSC advances 2015 v.5 no.102 pp. 84104-84112
ISSN:: 2046-2069
Subject:: Fourier transform infrared spectroscopy; ambient temperature; chemical structure; composite polymers; cooling; crystallization; glass; glass transition; hydrogen bonding; melting; shear strength
Abstract:: ... A novel difunctional monomer, 1,12-di(2-pyridine carbaldehyde-4′-hydrazinephenylate) dodecane (defined as DPCHP-DODE), was designed and synthesized through a two-step reaction process. The chemical structure of DPCHP-DODE was confirmed by a ¹H nuclear magnetic resonance (¹H-NMR) spectrum, Fourier-transform infrared (FT-IR) spectrum and elemental analysis (EA). Because the electron densities of bot ...
DOI:: 10.1039/c5ra10876d
: https://doi.org/10.1039/c5ra10876d

25. A phosphorus-containing thermotropic liquid crystalline copolyester with low mesophase temperature and high flame retardance

Author:: Zhao, Cheng-Shou; Chen, Li; Wang, Yu-Zhong
Source:: Journal of polymer science 2008 v.46 no.17 pp. 5752-5759
ISSN:: 0887-624X
Subject:: Fourier transform infrared spectroscopy; X-ray diffraction; chemical structure; differential scanning calorimetry; ethylene glycol; light microscopy; melting; nuclear magnetic resonance spectroscopy; oxygen; polyesters; temperature; thermogravimetry; transesterification; viscosity
Abstract:: ... A novel phosphorus-containing thermotropic liquid crystalline copolyester with flexible spacers (P-TLCP-FS) was synthesized by melt transesterification from p-acetoxybenzoic acid (p-ABA), terephthalic acid (TPA), ethylene glycol, and acetylated 2-(6-oxid-6H-dibenz(c,e) (1,2) oxaphosphorin 6-yl) 1,4-benzenediol (AODOPB). The chemical structure and properties of the obtained P-TLCP-FS were character ...
DOI:: 10.1002/pola.22890
: https://doi.org/10.1002/pola.22890

26. A physically stabilized amorphous solid dispersion of nisoldipine obtained by hot melt extrusion

Author:: Qiang Fu; Mingming Fang; Yanxian Hou; Wenqian Yang; Jingbo Shao; Mengran Guo; Mo Li; Jingru Li; Yongjun Wang; Zhonggui He; Jin Sun
Source:: Powder technology 2016 v.301 pp. 342-348
ISSN:: 0032-5910
Subject:: Beagle; Fourier transform infrared spectroscopy; X-radiation; absorption; bioavailability; differential scanning calorimetry; dogs; drugs; extrusion; hydrogen bonding; melting; pharmacokinetics; polymers; powders; therapeutics; water solubility
Abstract:: ... Nisoldipine is widely used clinically as an antihypertensive agent, however, its oral bioavailability and therapeutic effects are hindered by its very low solubility in water. The present study aimed to develop an amorphous solid dispersion (ASD) for nisoldipine, using hot melt extrusion, to increase or equilibrate with the in vitro dissolution and in vivo oral absorption of Nierxin, its commercia ...
DOI:: 10.1016/j.powtec.2016.06.032
: https://doi.org/10.1016/j.powtec.2016.06.032

27. A practical way of grafting maleic anhydride onto polypropylene providing high anhydride contents without sacrificing excessive molar mass

Author:: Henry, Gaëtan R.P.; Drooghaag, Xavier; Rousseaux, Dimitri D.J.; Sclavons, Michel; Devaux, Jacques; Marchand-Brynaert, Jacqueline; Carlier, Véronique
Source:: Journal of polymer science 2008 v.46 no.9 pp. 2936-2947
ISSN:: 0887-624X
Subject:: Fourier transform infrared spectroscopy; bromine; crystal structure; enthalpy; extrusion; maleic anhydrides; melting; molecular weight; nuclear magnetic resonance spectroscopy; polypropylenes; titration; waxes
Abstract:: ... This study reports a reactive extrusion process leading to very high levels of anhydride grafting (2.5-3 wt %) along polypropylene backbone without recovering grafted PP waxes at the die exit. Such high graftings are attainable without excessive degradation of the PP chain by using a brominated reagent. Simultaneously, this brominated reagent allows the tuning of the grafted PP crystallinity via e ...
DOI:: 10.1002/pola.22628
: https://doi.org/10.1002/pola.22628

28. A promising TNT alternative 3,3′-bi(1,2,4-oxadiazole)-5,5′-diylbis(methylene)dinitrate (BOM): thermal behaviors and eutectic characteristics

Author:: Xiong Yang; Jing Zhou; Xiaoling Xing; Yafeng Huang; Zhengfeng Yan; Qi Xue; Xiaofeng Wang; Bozhou Wang
Source:: RSC advances 2020 v.10 no.44 pp. 26425-26432
ISSN:: 2046-2069
Subject:: Fourier transform infrared spectroscopy; activation energy; atmospheric pressure; differential scanning calorimetry; explosives; heat; liquids; melting; melting point; nitrates; temperature; thermal degradation; thermal stability; thermogravimetry; trinitrotoluene
Abstract:: ... 3,3′-Bi(1,2,4-oxadiazole)-5,5′-diylbis(methylene)dinitrate (BOM) is a liquid phase carrier for melt cast explosives that is expected to replace TNT. The combination of a conjugated 1,2,4-oxadiazole backbone and nitrate ester groups endows BOM with both good energetic performance and impressive insensitivity. In this paper, the thermal behaviors of BOM were investigated using a TG–DSC synchronous t ...
DOI:: 10.1039/d0ra04517a
: https://doi.org/10.1039/d0ra04517a

29. A safer route for preparation of anion exchange membrane from inter-polymer film and performance evaluation in electrodialytic application

Author:: Saroj Sharma; Milan Dinda; Chirag R. Sharma; Pushpito K. Ghosh
Source:: Journal of membrane science 2014 v.459 pp. 122-131
ISSN:: 0376-7388
Subject:: Fourier transform infrared spectroscopy; carcinogens; desalination; electrical properties; electrolytes; films (materials); ion exchange capacity; ion-exchange membranes; magnetism; melting; poly(vinyl chloride); polyethylene; scanning electron microscopy; sodium chloride; strength (mechanics); trimethylamine; water uptake
Abstract:: ... The present article describes a greener route to inter-polymer anion exchange membranes (AEMs) utilizing p-methylstyrene-co-divinylbenzene (p-MS-co-DVB) in place of styrene-co-divinylbenzene (Sty-co-DVB). Polyvinyl chloride (PVC) and polyethylene (PE) were used as binders and films were prepared from the inter-polymers by solution casting and melt extrusion processes, respectively. Functionalizati ...
DOI:: 10.1016/j.memsci.2014.02.011
: https://doi.org/10.1016/j.memsci.2014.02.011

30. A series of electrospun fatty acid ester/polyacrylonitrile phase change composite nanofibers as novel form-stable phase change materials for storage and retrieval of thermal energy

Author:: Huizhen Ke; Yonggui Li
Source:: Textile research journal v.87 no.19 pp. 2314-2322
ISSN:: 1746-7748
Subject:: Fourier transform infrared spectroscopy; chemical structure; differential scanning calorimetry; energy conservation; enthalpy; fabrics; melting; nanofibers; palmitates; polyacrylonitrile; scanning electron microscopy; solar energy; stearic acid; temperature; textile fibers; thermal energy
Abstract:: ... In this paper, a series of fatty acid esters, including ethyl laurate (EL), butyl stearate (BS), ethyl palmitate (EP), ethyl stearate (ES) and methyl palmitate (MP), were selected as the solid–liquid phase change materials (PCMs), and then embedded inside the porous network structure of polyacrylonitrile (PAN) nanofibers supporting the skeleton by electrospinning technology, respectively. Morpholo ...
DOI:: 10.1177/0040517516669078
: https://doi.org/10.1177/0040517516669078

31. A study on mediating the crystallization behavior of PBT through intermolecular hydrogen-bonding

Author:: Zhiyuan Shen; Faliang Luo; Hongcun Bai; Pengfei Si; Xiaomei Lei; Shengfang Ding; Lijie Ji
Source:: RSC advances 2016 v.6 no.21 pp. 17510-17518
ISSN:: 2046-2069
Subject:: Fourier transform infrared spectroscopy; X-ray diffraction; absorption; crystal structure; crystallization; differential scanning calorimetry; hydrogen bonding; light microscopy; melting; mixing; moieties; temperature; thermal properties; wide-angle X-ray scattering
Abstract:: ... Intermolecular hydrogen-bonding could be formed between poly(butylene terephthalate) (PBT) and 4,4′-thiodiphenol (TDP) which was verified using advanced quantum-chemistry calculations. Blends of PBT and TDP were prepared through melt blending and the intermolecular hydrogen-bonding was characterized using Fourier transform infrared spectroscopy (FTIR). The results showed that intermolecular hydrog ...
DOI:: 10.1039/c5ra25438h
: https://doi.org/10.1039/c5ra25438h

32. A study on melt grafting of maleic anhydride onto low-density polyethylene and its blend with polyamide 6

Author:: Chuai, Chengzhi; Iqbal, Mahmood; Tian, Shixiong
Source:: Journal of polymer science 2010 v.48 no.3 pp. 267-275
ISSN:: 0887-6266
Subject:: Fourier transform infrared spectroscopy; adhesion; composite polymers; loss modulus; maleic anhydrides; melting; melting point; polyamides; polyethylene; rheometers; scanning electron microscopy; temperature; tensile strength; thermal analysis
Abstract:: ... Graft copolymerization of low-density polyethylene (LDPE) with a maleic anhydride (MAH) was performed using intermeshing corotating twin-screw extruder in the presence of benzoyl peroxide (BPO). The LDPE/polyamide 6 (PA6) and LDPE-g-MAH/PA6 blends were prepared in a corotating twin-screw extruder. The melt viscosity of the grafted LDPE was measured by a capillary rheometer. The grafted copolymer w ...
DOI:: 10.1002/polb.21867
: https://doi.org/10.1002/polb.21867

33. A study on the nature of intermolecular links in the cryotropic weak gels of hyaluronan

Author:: Tu Luan; Lijiao Wu; Hongbin Zhang; You Wang
Source:: Carbohydrate polymers 2012 v.87 no.3 pp. 2076-2085
ISSN:: 0144-8617
Subject:: Fourier transform infrared spectroscopy; X-ray diffraction; acidification; alkalinization; aqueous solutions; crystal structure; differential scanning calorimetry; gels; hyaluronic acid; hydrogen bonding; knots; melting; rheometry; scanning electron microscopy; temperature
Abstract:: ... In this study, the influence of acidification and salting effect on the properties of hyaluronan (HA) aqueous solutions and cryotropic weak gels were investigated by dynamic rheometry, polarizing and optical microscopy, scanning electron microscopy (SEM), X-ray diffraction (XRD), differential scanning calorimetry (DSC) and FTIR spectroscopy. The forming mechanism of HA cryotropic weak gels was als ...
DOI:: 10.1016/j.carbpol.2011.10.029
: https://doi.org/10.1016/j.carbpol.2011.10.029

34. A temperature-responsive poly(vinyl alcohol) gel for controlling fluidity of an inorganic phase change material

Author:: Parvin Karimineghlani; Emily Emmons; Micah J. Green; Patrick Shamberger; Svetlana A. Sukhishvili
Source:: Journal of materials chemistry A 2017 v.5 no.24 pp. 12474-12482
ISSN:: 2050-7496
Subject:: Fourier transform infrared spectroscopy; aqueous solutions; crosslinking; differential scanning calorimetry; freezing; gelatinization temperature; gelation; gels; hydrolysis; light scattering; liquids; lithium; melting; nitrates; polyvinyl alcohol; rheology; viscometry; viscosity
Abstract:: ... An environmentally responsive polymeric network has been demonstrated for incorporating an inorganic salt hydrate phase change material (PCM). The unique feature of this material is the capability of a polymer gel to simultaneously provide shape stabilization of a liquid salt hydrate phase at a lower temperature, and to reversibly adjust its assembly strength in response to a temperature increase. ...
DOI:: 10.1039/c7ta02897k
: https://doi.org/10.1039/c7ta02897k

35. Accelerated Weathering and UV Protection-Ability of Poly(lactic acid) Nanocomposites Containing Zinc Oxide Treated Halloysite Nanotube

Author:: K. Lim; W. S. Chow; S. Y. Pung
Source:: Journal of polymers and the environment 2019 v.27 no.8 pp. 1746-1759
ISSN:: 1566-2543
Subject:: Fourier transform infrared spectroscopy; X-ray diffraction; cleavage (chemistry); discoloration; halloysite; melting; nanocomposites; nanotubes; polylactic acid; thermal stability; thermogravimetry; ultraviolet-visible spectroscopy; weathering; zinc oxide
Abstract:: ... The aim of this study is to investigate the effects of zinc oxide treated halloysite nanotube (HNT-ZnO) on the properties of poly(lactic acid) (PLA) nanocomposites. ZnO was immobilized on HNT using a solvent-free technique. PLA nanocomposites were prepared with different loading of HNT-ZnO (i.e., 3, 5 and 7 wt%) using melt compounding. The properties of the PLA/HNT-ZnO nanocomposites were investig ...
DOI:: 10.1007/s10924-019-01464-5
: https://doi.org/10.1007/s10924-019-01464-5

36. Accelerated laboratory weathering of polypropylene composites filled with synthetic silicon-based compounds

Author:: Arkadiusz Niemczyk; Katarzyna Dziubek; Marek Grzymek; Krystyna Czaja
Source:: Polymer degradation and stability 2019 v.161 pp. 30-38
ISSN:: 0141-3910
Subject:: Fourier transform infrared spectroscopy; additives; antioxidants; crystallization; differential scanning calorimetry; melting; polypropylenes; resins; scanning electron microscopy; silsesquioxanes; thermal properties; weathering
Abstract:: ... Non-functionalized and n-alkyl functionalized polyhedral oligomeric silsesquioxanes (POSS), siloxane-silsesquioxane resins and the sol-gel silicas were for the first time examined as possible UV-stabilizers and/or antioxidants in polypropylene (PP). The obtained composites were subjected to the accelerated laboratory weathering tests. The influence of the weathering conditions on the structure and ...
DOI:: 10.1016/j.polymdegradstab.2019.01.005
: https://doi.org/10.1016/j.polymdegradstab.2019.01.005

37. Accessing the Physical State and Molecular Mobility of Naproxen Confined to Nanoporous Silica Matrixes

Author:: Cordeiro Teresa; Santos Andreia F. M.; Nunes Guilherme; Cunha Guilherme; Sotomayor João C.; Fonseca Isabel M.; Danède Florence; Dias C. J.; Cardoso M. Margarida; Correia Natália T.; Viciosa M. Teresa; Dionísio Madalena
Source:: The Journal of Physical Chemistry C 2016 v.120 no.26 pp. 14390-14401
ISSN:: 1932-7455
Subject:: Fourier transform infrared spectroscopy; X-ray diffraction; crystal structure; differential scanning calorimetry; drugs; glass transition; hosts; melting; nanopores; porosity; reflectance; silica; temperature
Abstract:: ... The pharmaceutical drug naproxen was loaded in three different silica hosts with pore diameters of 2.4 (MCM), 3.2 (MCM), and 5.9 nm (SBA), respectively: napMCM_₂.₄ ₙₘ, napMCM_₃.₂ ₙₘ, and napSBA_₅.₉ ₙₘ. To access the guest physical state in the prepared composites, differential scanning calorimetry (DSC), X-ray diffraction (XRD), and attenuated total reflectance Fourier transform infrared spectrosc ...
DOI:: 10.1021/acs.jpcc.6b04078
: https://doi.org/10.1021/acs.jpcc.6b04078

38. Acetylation of corn distillers dried grains

Author:: Narendra Reddy; Chunyan Hu; Kelu Yan; Yiqi Yang
Source:: Applied energy 2011 v.88 no.5 pp. 1664-1670
ISSN:: 0306-2619
Subject:: Fourier transform infrared spectroscopy; acetates; acetic anhydride; acetylation; carbohydrates; catalysts; corn; distillers grains; enthalpy; melting; melting point; nuclear magnetic resonance spectroscopy; proteins; thermal properties; viscosity
Abstract:: ... This paper shows that acidic conditions provide substantially higher % acetyl content, intrinsic viscosity and thermoplasticity even at low ratios of acetic anhydride and catalyst concentrations compared to using alkaline conditions for acetylation of oil-and-zein-free distillers dried grains with solubles (DDGS). Conventional methods of carbohydrate and protein acetylation are unsuitable for acet ...
DOI:: 10.1016/j.apenergy.2010.12.019
: https://doi.org/10.1016/j.apenergy.2010.12.019

39. Active Chicken Meat Packaging Based on Polylactide Films and Bimetallic Ag–Cu Nanoparticles and Essential Oil

Author:: Jasim Ahmed; Yasir Ali Arfat; Anibal Bher; Mehrajfatema Mulla; Harsha Jacob; Rafael Auras
Source:: Journal of food science 2018 v.83 no.5 pp. 1299-1310
ISSN:: 0022-1147
Subject:: Campylobacter jejuni; Fourier transform infrared spectroscopy; Listeria monocytogenes; Salmonella Typhimurium; active food packaging; antibacterial properties; bacteria; chicken meat; chickens; cinnamon; composite films; crystallization; essential oils; glass transition; melting; nanocomposites; nanoparticles; optical properties; polyethylene glycol; polylactic acid; scanning electron microscopy; shelf life; spoilage; temperature; thermal stability
Abstract:: ... Plasticized polylactide (PLA) composite films with multifunctional properties were created by loading bimetallic silver–copper (Ag–Cu) nanoparticles (NPs) and cinnamon essential oil (CEO) into polymer matrix via compression molding technique. Rheological, structural, thermal, barrier, and antimicrobial properties of the produced films, and its utilization in the packaging of chicken meat were inve ...
DOI:: 10.1111/1750-3841.14121
: https://doi.org/10.1111/1750-3841.14121

40. Additively Manufactured and Surface Biofunctionalized Porous Nitinol

Author:: Gorgin Karaji Z.; Speirs M.; Dadbakhsh S.; Kruth J.-P.; Weinans H.; Zadpoor A. A.; Amin Yavari S.
Source:: ACS Applied Materials & Interfaces 2017 v.9 no.2 pp. 1293-1304
ISSN:: 1944-8252
Subject:: Fourier transform infrared spectroscopy; X-ray photoelectron spectroscopy; ambient temperature; biochemical compounds; biocompatible materials; bones; calcium; cell culture; cell proliferation; manufacturing; melting; micro-computed tomography; orthopedics; porosity; prostheses; surface area; tissue repair
Abstract:: ... Enhanced bone tissue regeneration and improved osseointegration are among the most important goals in design of multifunctional orthopedic biomaterials. In this study, we used additive manufacturing (selective laser melting) to develop multifunctional porous nitinol that combines superelasticity with a rationally designed microarchitecture and biofunctionalized surface. The rational design based o ...
DOI:: 10.1021/acsami.6b14026
: https://doi.org/10.1021/acsami.6b14026

41. Aliphatic thermoplastic polyurethane-ureas and polyureas synthesized through a non-isocyanate route

Author:: Suqing Li; Jingbo Zhao; Zhiyuan Zhang; Junying Zhang; Wantai Yang
Source:: RSC advances 2014 v.5 no.9 pp. 6843-6852
ISSN:: 2046-2069
Subject:: Fourier transform infrared spectroscopy; condensation reactions; diethylene glycol; gel chromatography; melting; melting point; nuclear magnetic resonance spectroscopy; temperature; tensile strength; thermogravimetry; thermoplastics
Abstract:: ... A simple non-isocyanate route for synthesizing aliphatic thermoplastic polyurethane-ureas (TPUUs) and thermoplastic polyureas (TPUreas) is presented. Melt transurethane polycondensation of isophorone diamine or diethylene glycol bis(3-aminopropyl) ether with bis(hydroxyethyl) hexanediurethane, bis(hydroxyethyl) isophoronediurethane or bis(hydroxyethyl) piperazinediurethane was conducted at 170 °C ...
DOI:: 10.1039/c4ra12195c
: https://doi.org/10.1039/c4ra12195c

42. Aminolysis of poly(ethylene terephthalate) waste with ethylenediamine and characterization of α,ω-diamine products

Author:: Cuong N. Hoang; Yen H. Dang
Source:: Polymer degradation and stability 2013 v.98 no.3 pp. 697-708
ISSN:: 0141-3910
Subject:: Fourier transform infrared spectroscopy; aminolysis; ethylene; high performance liquid chromatography; mass spectrometry; melting; melting point; nuclear magnetic resonance spectroscopy; polyethylene terephthalates; thermal degradation; thermal properties; wastes
Abstract:: ... Bis(2-aminoethyl) terephthalamide (BAET, or trimer) and α,ω-aminoligo(ethylene terephthalamide) (AOET, or oligomers) were obtained from the reaction of poly(ethylene terephthalate) (PET) waste with excess amount of ethylenediamine (EDA). The structures of trimer BAET and oligomers AOET were confirmed by FTIR, NMR, HPLC-MS analysis. The influence of input molar ratio of reactants on oligomer yield ...
DOI:: 10.1016/j.polymdegradstab.2012.12.026
: https://doi.org/10.1016/j.polymdegradstab.2012.12.026

43. Aminopropyl-functionalized cubic Ia3d mesoporous silica nanoparticle as an efficient support for immobilization of superoxide dismutase

Author:: Mojtaba Falahati; Leila Ma'mani; Ali Akbar Saboury; Abbas Shafiee; Alireza Foroumadi; Ali Reza Badiei
Source:: Biochimica et biophysica acta 2011 v.1814 no.9 pp. 1195-1202
ISSN:: 1570-9639
Subject:: Fourier transform infrared spectroscopy; X-ray diffraction; differential scanning calorimetry; fluorescence; immobilized enzymes; melting; nanoparticles; nitrogen; nonionic surfactants; silica; superoxide dismutase; temperature
Abstract:: ... In this research, the immobilization of superoxide dismutase (SOD) onto aminopropyl-functionalized KIT-6 [n-PrNH₂-KIT-6] was investigated. This organo-functionalized mesoporous silica nanoparticle was prepared using a non-ionic surfactant and was fully characterized by XRD, nitrogen adsorption–desorption isotherm assay, IR and TGA techniques. An activity assay demonstrated that the immobilized SOD ...
DOI:: 10.1016/j.bbapap.2011.04.005
: https://doi.org/10.1016/j.bbapap.2011.04.005

44. An Investigation of Polyamides Based on Isoidide-2,5-dimethyleneamine as a Green Rigid Building Block with Enhanced Reactivity

Author:: Wu Jing; Jasinska-Walc Lidia; Dudenko Dmytro; Rozanski Artur; Hansen Michael Ryan; van Es Daan; Koning Cor E.
Source:: Macromolecules 2012 v.45 no.23 pp. 9333-9346
ISSN:: 1520-5835
Subject:: Fourier transform infrared spectroscopy; carbon; chemical composition; condensation reactions; crystal structure; differential scanning calorimetry; engineering; glass transition temperature; hydrogen bonding; melting; moieties; molecular weight; nuclear magnetic resonance spectroscopy; nylon; polyamides; polymerization; salts; spinning; stable isotopes; wide-angle X-ray scattering
Abstract:: ... Novel, semicrystalline polyamides and copolyamides were synthesized from a new carbohydrate-based diamine, namely isoidide-2,5-dimethyleneamine (IIDMA). In combination with 1,6-hexamethylene diamine (1,6-HDA) as well as the biobased sebacic acid (SA) or brassylic acid (BrA), the desired copolyamides were obtained via melt polymerization of the nylon salts followed by a solid-state polycondensation ...
DOI:: 10.1021/ma302126b
: https://doi.org/10.1021/ma302126b

45. An experimental investigation into the gasification reactivity and structure of agricultural waste chars

Author:: Fanfei Min; Mingxu Zhang; Yu Zhang; Yan Cao; Wei-Ping Pan
Source:: Journal of analytical and applied pyrolysis 2011 v.92 no.1 pp. 250-257
ISSN:: 0165-2370
Subject:: Fourier transform infrared spectroscopy; X-radiation; X-ray diffraction; agricultural wastes; carbon dioxide; cell walls; chemical structure; corn straw; gasification; heat; melting; pyrolysis; quartz; scanning electron microscopy; surface area; temperature; thermogravimetry; wheat straw
Abstract:: ... The gasification reactivity as well as physical and chemical structure of chars generated from two kinds of agricultural waste (i.e. corn straw and wheat straw) were studied to better understand the role of lower pyrolysis temperatures and lower heating rates on the gasification characteristics of agricultural waste chars. Char samples were generated in a one-stage quartz fixed-bed reactor. The ca ...
DOI:: 10.1016/j.jaap.2011.06.005
: https://doi.org/10.1016/j.jaap.2011.06.005

46. Antibacterial silver nanoparticles in polyvinyl alcohol/sodium alginate blend produced by gamma irradiation

Author:: Naeimeh Eghbalifam; Masoud Frounchi; Susan Dadbin
Source:: International journal of biological macromolecules 2015 v.80 pp. 170-176
ISSN:: 0141-8130
Subject:: Escherichia coli; Fourier transform infrared spectroscopy; Staphylococcus aureus; X-ray diffraction; antibacterial properties; composite materials; crystal structure; films (materials); gamma radiation; hydrocolloids; irradiation; melting; nanoparticles; nanosilver; polyvinyl alcohol; scanning electron microscopy; silver; silver nitrate; sodium alginate; temperature
Abstract:: ... Polyvinyl alcohol/sodium alginate/nano silver (PVA/SA/Ag) composite films were made by solution casting method. Gamma irradiation was used to synthesize silver nanoparticles in situ via reduction of silver nitrate without using harmful chemical agents for biomedical applications. UV–vis and XRD results demonstrated that spherical silver nanoparticles were produced even at low irradiation dose of 5 ...
DOI:: 10.1016/j.ijbiomac.2015.06.042
: https://doi.org/10.1016/j.ijbiomac.2015.06.042

47. Application of FTIR spectra for evaluating interfacial reactions in metal matrix composites

Author:: Kúdela, S. Jr.; Oswald, S.; Kúdela, S.; Wetzig, K.
Source:: Analytical and bioanalytical chemistry 2008 v.390 no.6 pp. 1477-1486
ISSN:: 1618-2642
Subject:: Fourier transform infrared spectroscopy; adsorption; alloys; annealing; bromine; ions; lithium; melting
Abstract:: ... Manufacturing of Saffil/MgLi metal matrix composites by the melt infiltration process is accompanied by extensive interfacial redox reaction between δ-Al₂O₃ fibers (Saffil) and lithium. The present paper deals with the Fourier transform infrared spectroscopy examination of Saffil fibers isolated from Mg-8 wt% Li alloy by the bromine/methylacetate agent focusing on the insertion of Li⁺ ions into δ- ...
DOI:: 10.1007/s00216-007-1820-z
PubMed:: 18204998
: https://doi.org/10.1007/s00216-007-1820-z

48. Application of the combination of ball-milling and hot-melt extrusion in the development of an amorphous solid dispersion of a poorly water-soluble drug with high melting point

Author:: Wenling Fan; Wenjing Zhu; Xinyi Zhang; Yan Xu; Liuqing Di
Source:: RSC advances 2019 v.9 no.39 pp. 22263-22273
ISSN:: 2046-2069
Subject:: Fourier transform infrared spectroscopy; X-ray diffraction; cooling; depolymerization; differential scanning calorimetry; drugs; extrusion; melting; melting point; milling; resveratrol; scanning electron microscopy; temperature; water solubility
Abstract:: ... The aim of the study was to develop an amorphous solid dispersion of a poorly water-soluble drug with high melting point by ball milling and hot melt extrusion as a co-processing method. Solid dispersion systems were prepared by ball milling-hot melt extrusion and then compared with those prepared with hot melt extrusion. The effects of three process parameters in the co-processing method, namely, ...
DOI:: 10.1039/c9ra00810a
: https://doi.org/10.1039/c9ra00810a

49. Aromatic poly(ether ester)s derived from a naturally occurring building block nipagin and linear aliphatic α,ω-diols

Author:: Keling Hu; Dongping Zhao; Guolin Wu; Jianbiao Ma
Source:: RSC advances 2017 v.7 no.52 pp. 32989-33000
ISSN:: 2046-2069
Subject:: 4-hydroxybenzoic acid; Campanulaceae; Fourier transform infrared spectroscopy; Lewis bases; catalysts; chemical structure; crystallization; differential scanning calorimetry; enthalpy; glass transition; melting; modulus of elasticity; molecular weight; nuclear magnetic resonance spectroscopy; temperature; tensile strength; thermal stability; thermogravimetry; thermoplastics; wide-angle X-ray scattering
Abstract:: ... Nipagin, the methyl ester of p-hydroxybenzoic acid, which is present naturally in campanulaceae and ericaceous plants, was used to prepare poly(ether ester)s. In this study, two nipagin-based aromatic dimethyl esters were synthesized via one-step simple nucleophilic substitutions with methyl chloroacetate and 1,4-dibromobutane, respectively. Subsequently, two series of poly(ether ester)s, PN1-ωs a ...
DOI:: 10.1039/c7ra01810j
: https://doi.org/10.1039/c7ra01810j

50. Assessment of localization and degradation of ZnO nano-particles in the PLA/PCL biocompatible blend through a comprehensive rheological characterization

Author:: Yeganeh Ahmadzadeh; Amir Babaei; Alireza Goudarzi
Source:: Polymer degradation and stability 2018 v.158 pp. 136-147
ISSN:: 0141-3910
Subject:: Fourier transform infrared spectroscopy; cleavage (chemistry); droplets; equations; melting; mixing; modulus of elasticity; nanocomposites; nanoparticles; polylactic acid; viscoelasticity; viscosity; zinc oxide
Abstract:: ... The aim of this work was to investigate the effect of addition of various amounts of zinc oxide (ZnO) nanoparticles on the polylactide/polycaprolactone (PLA/PCL) blend prepared by melt mixing method. The morphological, rheological and degradation of prepared nanocomposites were studied. The morphology was characterized as dispersed PCL droplets into the PLA matrix, and according to Young's equatio ...
DOI:: 10.1016/j.polymdegradstab.2018.10.007
: https://doi.org/10.1016/j.polymdegradstab.2018.10.007

51. Beeswax organogels: Influence of gelator concentration and oil type in the gelation process

Author:: Artur J. Martins; Miguel A. Cerqueira; Luiz H. Fasolin; Rosiane L. Cunha; António A. Vicente
Source:: Food research international 2016 v.84 pp. 170-179
ISSN:: 0963-9969
Subject:: crystals; loss modulus; carbon; gels; melting; X-radiation; differential scanning calorimetry; Fourier transform infrared spectroscopy; crystallization; medium chain triacylglycerols; microstructure; beeswax; polarized light; light microscopy; chemical interactions; oils; hysteresis; temperature; long chain triacylglycerols; rheology; gelation
Abstract:: ... This work focused on how different types of oil phase, MCT (medium chain triglycerides) and LCT (long chain triglycerides), exert influence on the gelation process of beeswax and thus properties of the organogel produced thereof. Organogels were produced at different temperatures and qualitative phase diagrams were constructed to identify and classify the type of structure formed at various compos ...
DOI:: 10.1016/j.foodres.2016.03.035
: https://doi.org/10.1016/j.foodres.2016.03.035

52. Binding effects and mechanisms of the carboxymethyl starch modified with nano-CaCO3 in magnetite concentrate pellets

Author:: Shuaishuai Lu; Zhitao Yuan; Jiongtian Liu; Jiwei Lu; Lixia Li; Haiqing Hao
Source:: Powder technology 2016 v.301 pp. 1183-1192
ISSN:: 0032-5910
Subject:: Fourier transform infrared spectroscopy; active sites; bentonite; crosslinking; crystallization; electrostatic interactions; heat treatment; hematite; hydrogen bonding; iron; ligands; magnetite; melting; modified starch; pelleting; pellets; porosity; powders; scanning electron microscopy; slags; viscosity; zeta potential
Abstract:: ... This study aimed to identify the carboxymethyl starch modified with nano-CaCO3 (CCMS) as an alternative binder in iron ore pelletization. Pelletization results showed that all wet, dry, preheated and fired pellets produced with CCMS met with the required values of strengths. The total Fe content of pellets also had a 1.04% increase by replacing 2% bentonite with 1% CCMS. FTIR and zeta potential te ...
DOI:: 10.1016/j.powtec.2016.07.074
: https://doi.org/10.1016/j.powtec.2016.07.074

53. Binding properties of butylated hydroxytoluene with calf thymus DNA in vitro

Author:: Yadi Ma; Junhui Pan; Guowen Zhang; Yue Zhang
Source:: Journal of photochemistry and photobiology 2013 v.126 pp. 112-118
ISSN:: 1011-1344
Subject:: DNA; Fourier transform infrared spectroscopy; absorption; adenine; binding properties; butylated hydroxytoluene; calves; enthalpy; entropy; ethidium; fluorescence; fluorescent dyes; hydrogen bonding; melting; melting point; pH; photobiology; photochemistry; thymine; thymus gland; van der Waals forces; viscosity
Abstract:: ... The binding properties of butylated hydroxytoluene (BHT) with calf thymus DNA (ctDNA) in simulated physiological buffer (pH 7.4) were investigated using ethidium bromide (EB) dye as a fluorescence probe by various spectroscopic techniques including UV–vis absorption, fluorescence, circular dichroism (CD), and Fourier transform infrared (FT-IR) spectroscopy along with ctDNA melting studies and visc ...
DOI:: 10.1016/j.jphotobiol.2013.07.011
: https://doi.org/10.1016/j.jphotobiol.2013.07.011

54. Binding properties of herbicide chlorpropham to DNA: Spectroscopic, chemometrics and modeling investigations

Author:: Yu Li; Guowen Zhang; Mo Tao
Source:: Journal of photochemistry and photobiology 2014 v.138 pp. 109-117
ISSN:: 1011-1344
Subject:: DNA; Fourier transform infrared spectroscopy; absorption; binding properties; calves; chemometrics; chlorpropham; circular dichroism spectroscopy; enthalpy; entropy; fluorescence; guanine; herbicidal properties; hydrogen bonding; hydrophobicity; least squares; melting; molecular models; thymus gland; titration; viscosity
Abstract:: ... The binding properties of chlorpropham (CIPC) to calf thymus DNA (ctDNA) were investigated in vitro by UV–vis absorption, fluorescence, circular dichroism (CD) and Fourier transform infrared (FT−IR) spectroscopy coupled with molecular modeling method. The results obtained from UV–vis absorption, fluorescence and CD spectroscopic methods as well as DNA viscosity and melting measurements indicated t ...
DOI:: 10.1016/j.jphotobiol.2014.05.011
: https://doi.org/10.1016/j.jphotobiol.2014.05.011

55. Biodegradable Blends from Corn Gluten Meal and Poly(butylene adipate-co-terephthalate) (PBAT): Studies on the Influence of Plasticization and Destructurization on Rheology, Tensile Properties and Interfacial Interactions

Author:: Murali M. Reddy; Manjusri Misra; Amar K. Mohanty
Source:: Journal of polymers and the environment 2014 v.22 no.2 pp. 167-175
ISSN:: 1566-2543
Subject:: Fourier transform infrared spectroscopy; biodegradability; corn gluten meal; corn protein; extrusion; hydrogen bonding; melting; mixing; rheology; tensile strength; thermoplastics; urea; viscosity
Abstract:: ... Melt extrusion was used to obtain thermoplastic corn gluten meal (tCGM) blends from plasticized corn gluten meal (pCGM) and poly(butylene adipate-co-terephthalate) (PBAT). Dynamic rheological tests, morphology and spectroscopy were employed to understand the effect of the plasticization and destructurization of corn gluten meal (CGM) on tCGM blends. Rheological data showed a plateau in the low fre ...
DOI:: 10.1007/s10924-014-0640-4
: https://doi.org/10.1007/s10924-014-0640-4

56. Biodegradable Copoly(Amino Acid)s Based on 6-Aminocaproic Acid and l-Leucine

Author:: Zhang, Weipeng; Huang, Yanqin
Source:: Journal of polymers and the environment 2011 v.19 no.1 pp. 177-181
ISSN:: 1566-2543
Subject:: papain; enthalpy; polymers; leucine; X-ray diffraction; nuclear magnetic resonance spectroscopy; polymerization; viscosity; differential scanning calorimetry; Fourier transform infrared spectroscopy; biodegradability; melting point; melting; thermal properties
Abstract:: ... Biodegradable copoly(amino acid)s based on 6-aminocaproic acid and l-leucine were prepared by melt condensation polymerization and characterized by Fourier transform infrared spectrometry (FTIR), proton nuclear magnetic resonance spectrometry (¹H NMR), and X-ray diffraction (XRD). The intrinsic viscosity and the density of the copoly(amino acid)s were measured. Thermal properties of the copoly(ami ...
DOI:: 10.1007/s10924-010-0250-8
: https://doi.org/10.1007/s10924-010-0250-8

57. Biodegradable PEG/cellulose, PEG/agarose and PEG/chitosan blends as shape stabilized phase change materials for latent heat energy storage

Author:: Sema Bilgin Şentürk; Derya Kahraman; Cemil Alkan; İsa Gökçe
Source:: Carbohydrate polymers 2011 v.84 no.1 pp. 141-144
ISSN:: 0144-8617
Subject:: Fourier transform infrared spectroscopy; agarose; biodegradability; cellulose; chitosan; differential scanning calorimetry; energy; heat; melting; melting point; microscopy
Abstract:: ... This study based on the preparation and characterization of PEG/cellulose, PEG/agarose, and PEG/chitosan blends as form/stable phase change materials (PCMs) for latent heat energy storage. 60/40% w/w PEG/cellulose, 70/30% w/w PEG/agarose, and 80/20% w/w PEG/chitosan blends were found to contain maximum PEG without leakage above melting point and are characterized using Fourier transform infrared ( ...
DOI:: 10.1016/j.carbpol.2010.11.015
: https://doi.org/10.1016/j.carbpol.2010.11.015

58. Biodegradable Polyester-Based Blend Reinforced with CurauÃ¡ Fiber: Thermal, Mechanical and Biodegradation Behaviour

Author:: Fernanda Harnnecker; Derval dos Santos Rosa; Denise Maria Lenz
Source:: Journal of polymers and the environment 2012 v.20 no.1 pp. 237-244
ISSN:: 1566-2543
Subject:: Fourier transform infrared spectroscopy; absorption; adhesion; alkali treatment; biodegradability; biodegradation; hardness; maleic anhydrides; melting; mixing; polypropylenes; scanning electron microscopy; thermal analysis
Abstract:: ... Biodegradable composites can be produced by the combination of biodegradable polymers (BP) as matrix and vegetal fibers as reinforcement. Composites of a commercial biodegradable polymer blend and curauÃ¡ fibers (loaded at 5, 15 and 20 wt%) were prepared by melt mixing in a twin-screw extruder. Chemical treatments such as alkali treatment of the fiber and addition of maleic anhydride grafted polyp ...
DOI:: 10.1007/s10924-011-0382-5
: https://doi.org/10.1007/s10924-011-0382-5

59. Biodegradable Polymeric Films Incorporated with Nisin: Characterization and Efficiency against Listeria monocytogenes

Author:: Setareh Ghorban Shiroodi; Sepehr Nesaei; Mahmoudreza Ovissipour; Hamzah M. Al-Qadiri; Barbara Rasco; Shyam Sablani
Source:: Food and bioprocess technology 2016 v.9 no.6 pp. 958-969
ISSN:: 1935-5130
Subject:: Fourier transform infrared spectroscopy; Listeria monocytogenes; agar; bacteria; biodegradability; culture media; enthalpy; glass transition; mechanical properties; melting; nisin; pea protein; polylactic acid; temperature; whey protein isolate
Abstract:: ... Nisin (0.2 IU per cm² films) containing biodegradable films were produced from pea protein isolate (PPI), whey protein isolate (WPI), and polylactic acid (PLA). Nisin was released over 4 h at 22 °C and 8 h at 4 °C. PPI released more nisin compared to other films suppressing the growth of Listeria monocytogenes (P < 0.05) based upon diffusion into agar and liquid culture media. The population of ba ...
DOI:: 10.1007/s11947-016-1684-3
CHORUS:: 10.1007/s11947-016-1684-3
: https://doi.org/10.1007/s11947-016-1684-3

60. Biodegradable Polymers from 5-Hydroxylevulinic Acid: 1. Synthesis and Characterization of Poly(5-hydroxylevulinic acid)

Author:: Wu, Linbo; Zhang, Yan; Fan, Hong; Bu, Zhiyang; Li, Bo-Geng
Source:: Journal of polymers and the environment 2008 v.16 no.1 pp. 68-73
ISSN:: 1566-2543
Subject:: Fourier transform infrared spectroscopy; biodegradability; cellulose; glass transition temperature; hydrogen bonding; melting; molecular weight; nuclear magnetic resonance spectroscopy; polyesters
Abstract:: ... As an attempt to synthesize new biodegradable polymers from renewable cellulose resources, melt polycondensation of 5-hydroxylevulinic acid (5-HLA) was reported for the first time. The resulting product, poly(5-hydroxylevulinic acid) (PHLA), was synthesized and characterized with GPC, FTIR, ¹H NMR and DSC. The in vitro degradation behaviors in phosphate-buffered saline (PBS) and in deionized water ...
DOI:: 10.1007/s10924-008-0082-y
: https://doi.org/10.1007/s10924-008-0082-y

61. Biodegradable and Bio-based Green Blends from Carbon Dioxide-Derived Bioplastic and Poly(Butylene Succinate)

Author:: Laurids Henke; Nima Zarrinbakhsh; Hans-Josef Endres; Manjusri Misra; Amar K. Mohanty
Source:: Journal of polymers and the environment 2017 v.25 no.2 pp. 499-509
ISSN:: 1566-2543
Subject:: Fourier transform infrared spectroscopy; additives; biodegradability; bioplastics; carbon; carbon dioxide; composite polymers; fossil fuels; melting; mixing; polyesters; propylene; propylene oxide; scanning electron microscopy; shrinkage; succinic acid; tensile strength; thermal properties
Abstract:: ... Conventional polymer materials from fossil fuels feature many unresolved questions regarding disposing and future resource availability. To substitute some of the established plastics with bio-based and biodegradable alternatives, new materials have to be developed and researched. The aliphatic biodegradable polyester poly(butylene succinate) offers good material properties and the perspective to ...
DOI:: 10.1007/s10924-016-0828-x
: https://doi.org/10.1007/s10924-016-0828-x

62. Biodegradable biopolymer–graphene nanocomposites

Author:: Tahrima B. Rouf; Jozef L. Kokini
Source:: Journal of materials science 2016 v.51 no.22 pp. 9915-9945
ISSN:: 0022-2461
Subject:: Fourier transform infrared spectroscopy; X-ray diffraction; alginates; atomic force microscopy; biodegradability; biopolymers; cellulose; chitosan; functional properties; graphene; graphene oxide; mechanical properties; melting; nanocomposites; polyamides; polylactic acid; polymerization; scanning electron microscopy; solvents; starch; transmission electron microscopy
Abstract:: ... Graphene’s invention has catalyzed many new material applications in different fields. It has been used in combination with different biopolymers to design nanocomposites with improved mechanical, thermal, electrical, as well as, gas-, and water vapor-barrier properties. This review focuses on the chemistry and synthesis of graphene oxide (GO) and sheds some light on the different ecological pathw ...
DOI:: 10.1007/s10853-016-0238-4
: https://doi.org/10.1007/s10853-016-0238-4

63. Biodegradable block poly(ester-urethane)s based on poly(3-hydroxybutyrate-co-4-hydroxybutyrate) copolymers

Author:: Wenfeng Ou; Handi Qiu; Zhifei Chen; Kaitian Xu
Source:: Biomaterials 2011 v.32 no.12 pp. 3178-3188
ISSN:: 0142-9612
Subject:: Fourier transform infrared spectroscopy; adhesion; biocompatibility; biodegradability; blood coagulation; catalysts; cell growth; cell proliferation; composite polymers; contact angle; crystal structure; differential scanning calorimetry; energy; fibroblasts; gel chromatography; hydrophilicity; hydrophobicity; lactate dehydrogenase; melting; mice; molecular weight; nuclear magnetic resonance spectroscopy; polylactic acid; polymerization; polyurethanes; raw materials; scanning electron microscopes; scanning electron microscopy; thermal properties; thermogravimetry; urethane
Abstract:: ... A series of block poly(ester-urethane)s (abbreviated as PU3/4HB) based on biodegradable poly(3-hydroxybutyrate-co-4-hydroxybutyrate) (P3/4HB) segments were synthesized by a facile way of melting polymerization using 1,6-hexamethylene diisocyanate (HDI) as the coupling agent and stannous octanoate (Sn(Oct)₂) as catalyst, with different 4HB contents and segment lengths. The chemical structure, molec ...
DOI:: 10.1016/j.biomaterials.2011.01.031
: https://doi.org/10.1016/j.biomaterials.2011.01.031

64. Biodegradation of Pro-oxidant Filled Polypropylene Films and Evaluation of the Ecotoxicological Impact

Author:: Dev K. Mandal; Haripada Bhunia; Pramod K. Bajpai; Anil Kumar; Gaurav Madhu; Golok B. Nando
Source:: Journal of polymers and the environment 2018 v.26 no.3 pp. 1061-1071
ISSN:: 1566-2543
Subject:: Fourier transform infrared spectroscopy; biodegradability; biodegradation; calcium; cobalt; corn; crystal structure; differential scanning calorimetry; ecotoxicology; melting; mixing; plant growth; polypropylenes; stearic acid; tensile strength; thermal stability; thermogravimetry; tomatoes; toxicity
Abstract:: ... The biodegradability of calcium stearate (CaSt) and cobalt stearate (CoSt) filled polypropylene (PP) films were investigated in this work. The PP films were prepared using melt blending technique followed by hot press moulding. On the basis of their tensile properties, the optimum amount of pro-oxidants was taken as 0.2 phr. Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysi ...
DOI:: 10.1007/s10924-017-1016-3
: https://doi.org/10.1007/s10924-017-1016-3

65. Biodegradation of poly(lactic acid) and some of its based systems with Trichoderma viride

Author:: Rodica Lipsa; Nita Tudorachi; Raluca Nicoleta Darie-Nita; Lacramioara Oprică; Cornelia Vasile; Aurica Chiriac
Source:: International journal of biological macromolecules 2016 v.88 pp. 515-526
ISSN:: 0141-8130
Subject:: Fourier transform infrared spectroscopy; Trichoderma viride; additives; biodegradability; biodegradation; chemical structure; collagen; fungi; hydrolysis; melting; polylactic acid; scanning electron microscopy; thermal stability; thermogravimetry; weight loss
Abstract:: ... The purpose of this study was to assess the biodegradation of poly(lactic acid) (PLA) and some plasticized PLA based systems by Trichoderma viride fungus, in liquid medium and controlled laboratory conditions. The studied systems were achieved using PLA, hydrolyzed collagen (HC) as biological macromolecules and other additives by melt processing procedure. PLA and the systems’ biodegradability was ...
DOI:: 10.1016/j.ijbiomac.2016.04.017
: https://doi.org/10.1016/j.ijbiomac.2016.04.017

66. Biopolymer blends from hardwood lignin and bio-polyamides: Compatibility and miscibility

Author:: R. Muthuraj; M. Hajee; A.R. Horrocks; B.K. Kandola
Source:: International journal of biological macromolecules 2019 v.132 pp. 439-450
ISSN:: 0141-8130
Subject:: Fourier transform infrared spectroscopy; Gibbs free energy; biopolymers; glass transition; hardwood lignin; lignin content; melting; polyamides; thermal degradation; thermogravimetry; viscosity
Abstract:: ... The compatibility of hardwood lignin (TcA)/bio-polyamide (PA) blends, prepared by melt compounding TcA with three different biobased polyamides, PA 1012, PA 1010 and PA 11 in a twin screw extruder has been studied. FTIR studies indicated the existence of physicochemical interactions between the TcA and polyamide. The melting temperatures of the blends were significantly reduced compared to the res ...
DOI:: 10.1016/j.ijbiomac.2019.03.142
: https://doi.org/10.1016/j.ijbiomac.2019.03.142

67. Biosynthesis and accumulation of poly(3-hydroxybutyrate-co-3-hydroxyvalerate)-polyethylene glycol, a hybrid co-polymer by endophytic Bacillus cereus RCL 02

Author:: Rituparna Das; Arundhati Pal; A. K. Paul
Source:: Bioprocess and biosystems engineering 2019 v.42 no.5 pp. 807-815
ISSN:: 1615-7591
Subject:: Bacillus cereus; Fourier transform infrared spectroscopy; Ricinus communis; X-ray diffraction; bacteria; biopolyesters; biosynthesis; composite polymers; copolymerization; differential scanning calorimetry; endophytes; ethylene glycol; glucose; leaves; melting; nuclear magnetic resonance spectroscopy; polyhydroxyalkanoates; salts; spectral analysis; thermogravimetry; valeric acid
Abstract:: ... Co-polymerization of microbial polyesters, polyhydroxyalkanoates (PHAs), with synthetic polymers has become an established and promising tool in the recent past for improving the material and biological properties of the biopolyesters. Bacillus cereus RCL 02, a leaf endophytic bacterium of the oleaginous plant Ricinus communis L., has been reported to produce a significant amount of poly(3-hydroxy ...
DOI:: 10.1007/s00449-019-02084-y
: https://doi.org/10.1007/s00449-019-02084-y

68. Biosynthesis and characterization of polyhydroxyalkanoates produced by an extreme halophilic bacterium, Halomonas nitroreducens, isolated from hypersaline ponds

Author:: J.M. Cervantes‐Uc; J. Catzin; I. Vargas; W. Herrera‐Kao; F. Moguel; E. Ramirez; S. Rincón‐Arriaga; G. Lizama‐Uc
Source:: Journal of applied microbiology 2014 v.117 no.4 pp. 1056-1065
ISSN:: 1364-5072
Subject:: Fourier transform infrared spectroscopy; Halomonas; bacteria; biosynthesis; crystal structure; energy-dispersive X-ray analysis; fluorescence; image analysis; melting; polyhydroxybutyrate; ponds; scanning electron microscopy; Mexico
Abstract:: ... AIMS: Morphological, biochemical and genotypic characterization of a halophilic bacterium isolated from hypersaline ponds located at Las Coloradas (Río Lagartos, Yucatán, Mexico). Characterization of polymer produced by this strain was also performed. METHODS AND RESULTS: Twenty strains were isolated from water samples of salt ponds and selected based on both morphological features and their PHA s ...
DOI:: 10.1111/jam.12605
: https://doi.org/10.1111/jam.12605

69. Biotic degradation of poly(dl-lactide) based nanocomposites

Author:: K. Fukushima; E. Giménez; L. Cabedo; J.M. Lagarón; J.L. Feijoo
Source:: Polymer degradation and stability 2012 v.97 no.8 pp. 1278-1284
ISSN:: 0141-3910
Subject:: Fourier transform infrared spectroscopy; composts; hydrolysis; kaolinite; melting; montmorillonite; nanoclays; nanocomposites; polymers
Abstract:: ... Amorphous PLA nanocomposites based on organic modified kaolinite (KAO) and montmorillonite (MONT) at 4 wt.% were prepared by melt blending and then biodegraded in compost. All materials showed effective degradation in this medium, according to visual observations, DSC and FTIR analysis. The addition of nanoclays was found to increase the PLA degradation rate, especially for kaolinite, due to the p ...
DOI:: 10.1016/j.polymdegradstab.2012.05.029
: https://doi.org/10.1016/j.polymdegradstab.2012.05.029

70. Broad NIR emission near c - Si band gap from Bi-doped Ba–Al metaphosphate glasses as promising solar spectral converter

Author:: Debarati Ghosh; S. Balaji; K. Biswas; K. Annapurna
Source:: Journal of materials science 2015 v.50 no.16 pp. 5450-5457
ISSN:: 0022-2461
Subject:: Fourier transform infrared spectroscopy; aluminum; barium; bismuth; ions; luminescence; melting; silicon
Abstract:: ... A broad and intense visible as well as NIR luminescence is obtained from bismuth ions doped in alkali-free Ba–Al metaphosphate glasses. The glasses with varied bismuth oxide content have been prepared by melt quenching technique. With increase in bismuth concentration, the NIR emitting centers are found to be dominant, while at lower concentrations no NIR emission is perceived. The visible emissio ...
DOI:: 10.1007/s10853-015-9090-1
: https://doi.org/10.1007/s10853-015-9090-1

71. CO2 Capture by CaO in Molten CaF2–CaCl2: Optimization of the Process and Cyclability of CO2 Capture

Author:: Tomkute Viktorija; Solheim Asbjørn; Olsen Espen
Source:: Energy 2014 v.28 no.8 pp. 5345-5353
ISSN:: 1520-5029
Subject:: Fourier transform infrared spectroscopy; atmospheric pressure; calcium chloride; calcium oxide; carbon dioxide; carbonation; desorption; melting; nitrogen; temperature
Abstract:: ... CO₂ capture by CaO dissolved or partly dissolved in a molten salt shows high, reversible CO₂ sorption because of rapid gas–liquid interactions. Using previously obtained data on CaO reactivity with CO₂ in a CaCl₂ melt, we describe here the application of the CaF₂–CaCl₂ molten salt for CaO dissolution or partly dissolution in a CO₂ capture process. The effects of the CaO concentration in CaF₂–CaCl₂ ...
DOI:: 10.1021/ef5010896
: https://doi.org/10.1021/ef5010896

72. Calcination of UV shielding nanopowder and its effect on weather resistance property of polyurethane nanocomposite films

Author:: Bapan Adak; B. S. Butola; Mangala Joshi
Source:: Journal of materials science 2019 v.54 no.19 pp. 12698-12712
ISSN:: 0022-2461
Subject:: Fourier transform infrared spectroscopy; X-ray diffraction; atomic force microscopy; crystal structure; energy-dispersive X-ray analysis; melting; mixing; nanocomposites; nanoparticles; particle size; polyurethanes; synergism; tensile strength; titanium dioxide; transmission electron microscopy; weather; weathering; zinc oxide
Abstract:: ... In this study, the synergistic effect of ZnO nanoparticles in combination with two different crystal phases of TiO₂ nanoparticles on improving weather resistance property of polyurethane (PU) film has been studied. The UV shielding nanopowder containing TiO₂ and ZnO nanoparticles was calcinated at varying conditions, and the process was optimized to obtain the desired crystal structure. After calc ...
DOI:: 10.1007/s10853-019-03739-7
: https://doi.org/10.1007/s10853-019-03739-7

73. Calcium Chloride Hexahydrate/Diatomite/Paraffin as Composite Shape-Stabilized Phase-Change Material for Thermal Energy Storage

Author:: Xinxing Zhang; Xiang Li; Yuan Zhou; Chunxi Hai; Yue Shen; Xiufeng Ren; Jinbo Zeng
Source:: Energy & fuels 2018 v.32 no.1 pp. 916-921
ISSN:: 1520-5029
Subject:: Fourier transform infrared spectroscopy; calcium chloride; coatings; diatomaceous earth; enthalpy; fuels; hydrogen bonding; melting; scanning electron microscopes; scanning electron microscopy; supercooling; surface tension; thermal energy; thermal stability
Abstract:: ... In this work, the calcium chloride hexahydrate/diatomite/paraffin composite phase-change material (PCM) was fabricated by impregnating calcium chloride hexahydrate into diatomite and further coating with paraffin. Scanning electron microscope (SEM) results showed that the hydrated salt could be impregnated into a diatomite well and the paraffin could be coated on a diatomite surface. The Fourier t ...
DOI:: 10.1021/acs.energyfuels.7b02866
: https://doi.org/10.1021/acs.energyfuels.7b02866

74. Carbamate end-capped poly(oxymethylene) copolymer with enhanced thermal stability prepared by reactive extrusion

Author:: Zhuoxin Liu; Wei Zeng; Rui Yang; Feng Yang
Source:: Polymer degradation and stability 2015 v.111 pp. 131-141
ISSN:: 0141-3910
Subject:: Fourier transform infrared spectroscopy; absorbents; air; composite polymers; crosslinking; extrusion; formaldehyde; mechanical properties; melting; molecular weight; nitrogen; stabilizers; thermal stability; thermogravimetry; weight loss
Abstract:: ... Carbamate end-capped poly(oxymethylene) (POM) copolymer was prepared by reactive extrusion and its stability has been studied by means of thermogravimetric analysis (TGA) both in air and in nitrogen, content of formaldehyde generated (C.F.G) and isothermal weight loss. 4, 4′-diphenylmethane diisocyanate (MDI) was used as an end-cap agent to react with POM molecules during extrusion. MFI results an ...
DOI:: 10.1016/j.polymdegradstab.2014.11.005
: https://doi.org/10.1016/j.polymdegradstab.2014.11.005

75. Carboxymethylation and acetylation of the polysaccharide from Cordyceps militaris and their α-glucosidase inhibitory activities

Author:: Yuan-Yuan Ren; Peng-Peng Sun; Ying-Ping Ji; Xiao-Ting Wang; Shu-Han Dai; Zhen-Yuan Zhu
Source:: Natural product research 2020 v.34 no.3 pp. 369-377
ISSN:: 1478-6427
Subject:: Cordyceps militaris; Fourier transform infrared spectroscopy; acetylation; alpha-glucosidase; atomic force microscopy; bioactive properties; differential scanning calorimetry; enzyme inhibition; gel chromatography; melting; nuclear magnetic resonance spectroscopy; polysaccharides; scanning electron microscopy; ultrastructure
Abstract:: ... The crude polysaccharide extracted from Cordyceps militaris was chemically modified to obtain carboxymethylated derivatives (CM-CPS) and acetylated derivatives (AC-CPS). The physicochemical characterizations were comparatively investigated by chemical methods, high-performance gel permeation chromatography, FT-IR spectra, NMR analysis, Congo red test, scanning electron microscopy, atomic force mic ...
DOI:: 10.1080/14786419.2018.1533830
: https://doi.org/10.1080/14786419.2018.1533830

76. Castor oil-derived monomer ricinoleic acid based biodegradable unsaturated polyesters

Author:: P. Rajalakshmi; J. Margaret Marie; A. John Maria Xavier
Source:: Polymer degradation and stability 2019 v.170 pp. 109016
ISSN:: 0141-3910
Subject:: Fourier transform infrared spectroscopy; biodegradability; carbon; castor oil; catalytic activity; cell viability; condensation reactions; crosslinking; differential scanning calorimetry; drug carriers; glutaric acid; hepatocytes; humans; melting; modulus of elasticity; molecular weight; nuclear magnetic resonance spectroscopy; polyesters; ricinoleic acid; stable isotopes; temperature; thermal properties; thermogravimetry; tissue scaffolds
Abstract:: ... Castor oil-based monomers and derivatives are favorable starting materials for the synthesis of polymers for biomedical applications. A series of polymers containing ricinoleic acid (extracted from cold-pressed castor oil) as a prime monomer along with glutaric acid and various linear aliphatic α,ω-diols were synthesized through self-catalyzed melt polycondensation method. The unsaturated prepolym ...
DOI:: 10.1016/j.polymdegradstab.2019.109016
: https://doi.org/10.1016/j.polymdegradstab.2019.109016

77. Catalytic and synergistic effects on thermal stability and combustion behavior of polypropylene: influence of maleic anhydride grafted polypropylene stabilized cobalt nanoparticles

Author:: Qingliang He; Tingting Yuan; Suying Wei; Zhanhu Guo
Source:: Journal of materials chemistry A 2013 v.1 no.42 pp. 13064-13075
ISSN:: 2050-7496
Subject:: Fourier transform infrared spectroscopy; additives; catalytic activity; cobalt; combustion; differential scanning calorimetry; heat; maleic anhydrides; melting; molecular weight; nanoparticles; polymer nanocomposites; polypropylenes; rheological properties; rheometry; surface tension; surfactants; synergism; thermal degradation; thermal stability; thermogravimetry
Abstract:: ... A novel function of polypropylene grafted with maleic anhydride (PP-g-MA) as synergistic additives to effectively reduce the combustion rates of polypropylene (PP) polymer nanocomposites (PNCs) reinforced with in situ synthesized cobalt (Co)–cobalt oxide core–shell nanoparticles (NPs) was reported. Two PP-g-MAs with molecular weights of ∼800 and 2500 g mol⁻¹ have been chosen to demonstrate this fu ...
DOI:: 10.1039/c3ta12260c
: https://doi.org/10.1039/c3ta12260c

78. Catalytic effects of CaO, Al2O3, Fe2O3, and red mud on Pteris vittata combustion: Emission, kinetic and ash conversion patterns

Author:: Yueyao Song; Jinwen Hu; Jingyong Liu; Fatih Evrendilek; Musa Buyukada
Source:: Journal of cleaner production 2020 v.252 pp. 119646
ISSN:: 0959-6526
Subject:: Fourier transform infrared spectroscopy; Pteris vittata; X-ray fluorescence spectroscopy; activation energy; aluminum; aluminum oxide; biomass; calcium oxide; carbon dioxide; catalysts; catalytic activity; combustion; emissions; enthalpy; ferric oxide; fluorescence; fouling; heat transfer; hydrogen cyanide; melting; nitric oxide; risk reduction; sulfur dioxide; thermogravimetry
Abstract:: ... Catalytic effects of red mud (RM), calcium oxide (CaO), aluminum trioxide (Al₂O₃), and ferric oxide (Fe₂O₃) were quantified on the combustion, emission and ash characteristics of aboveground (PA) and belowground (PB) biomass of Pteris vittata using thermogravimetric, Fourier transform infrared, X-ray fluorescence and FactSage analyses. CaO affected the specific formation pathways of tar species an ...
DOI:: 10.1016/j.jclepro.2019.119646
: https://doi.org/10.1016/j.jclepro.2019.119646

79. Cell Morphology and Improved Heat Resistance of Microcellular Poly(l-lactide) Foam via Introducing Stereocomplex Crystallites of PLA

Author:: Jia Pin; Hu Jie; Zhai Wentao; Duan Yongxin; Zhang Jianming; Han Changyu
Source:: Industrial & Engineering Chemistry Research 2015 v.54 no.9 pp. 2476-2488
ISSN:: 1520-5045
Subject:: Fourier transform infrared spectroscopy; carbon dioxide; cell structures; crystal structure; crystallites; crystallization; engineering; foaming; heat stability; heat tolerance; melting; melting point; mixing; polylactic acid; scanning electron microscopy
Abstract:: ... The preparation of poly(l-lactic acid) (PLLA) foam with well-defined cell structure and high heat resistance is critical to broaden its applications. In this study, the stereocomplex crystallites (SC) with higher melting point and heat stability were introduced into PLLA foam by melt blending the PLLA with different amounts of poly(d-lactic acid) (PDLA). The crystal structures of pure PLLA and PLL ...
DOI:: 10.1021/ie504345y
: https://doi.org/10.1021/ie504345y

80. Characterisation and thermophysical properties of graphene nanoparticles dispersed erythritol PCM for medium temperature thermal energy storage applications

Author:: Mayilvelnathan Vivekananthan; Valan Arasu Amirtham
Source:: Thermochimica acta 2019 v.676 pp. 94-103
ISSN:: 0040-6031
Subject:: Fourier transform infrared spectroscopy; enthalpy; erythritol; graphene; latent heat; melting; melting point; nanoparticles; solidification; temperature; thermal conductivity; thermal energy
Abstract:: ... Nanoparticles dispersed phase change material (NDPCM) is a new kind of PCM developed by suspending nano-size particles in base PCM for the main purpose of enhancing the thermo-physical properties of the base PCM. In the present research work, the feasibility and thermal conductivity enhancement of dispersing graphene particles in three different mass fractions (0.1%, 0.5% and 1%) into the erythrit ...
DOI:: 10.1016/j.tca.2019.03.037
: https://doi.org/10.1016/j.tca.2019.03.037

81. Characteristics of Gelatin Extracted from the Swim Bladder of Yellowfin Tuna (Thunnus albacores) as Affected by Alkaline Pretreatments

Author:: Onouma Kaewdang; Soottawat Benjakul; Thummanoon Prodpran; Thammarat Kaewmanee; Hideki Kishimura
Source:: Journal of aquatic food product technology 2016 v.25 no.8 pp. 1190-1201
ISSN:: 1547-0636
Subject:: Fourier transform infrared spectroscopy; Thunnus albacares; alkali treatment; gel strength; gelatin; gelation; imino acids; melting; microstructure; sodium; sodium hydroxide; swim bladder; temperature
Abstract:: ... Gelatins extracted from the swim bladder of yellowfin tuna (Thunnus albacores) using various alkaline pretreatments were characterized. Alkaline mixtures (Na ₂CO ₃:NaOH) at different ratios (9:1, 8:2, 7:3, and 6:4) with a concentration of 4% (w/v) were used. The corresponding gelatins termed “G1,” “G2,” “G3,” and “G4” had yields of 9.78, 14.91, 35.96, and 13.60% (dry weight basis), respectively. A ...
DOI:: 10.1080/10498850.2015.1043418
: https://doi.org/10.1080/10498850.2015.1043418

82. Characterization of Hydrolysis Lignin Bonding Properties During the Pelletization of Eucalyptus Sawdust

Author:: Weizhen Li; Yang Jiang; Xiuli Yin
Source:: Waste and biomass valorization 2020 v.11 no.3 pp. 995-1003
ISSN:: 1877-2641
Subject:: Eucalyptus; Fourier transform infrared spectroscopy; differential scanning calorimetry; glass transition; glass transition temperature; hydrolysis; lignin; lignin content; melting; melting point; moieties; pelleting; pellets; phenol; sawdust; scanning electron microscopy
Abstract:: ... This work assessed the effects of the bonding of hydrolysis lignin during the pelletization of eucalyptus sawdust. The characteristic thermal transition temperatures of hydrolysis lignin and eucalyptus sawdust were initially determined using differential scanning calorimetry, and the glass transition temperatures (Tg) were recorded at 94.4 and 87 °C, respectively, while their melting temperatures ...
DOI:: 10.1007/s12649-018-0432-5
: https://doi.org/10.1007/s12649-018-0432-5

83. Characterization of Polyhydroxybutyrate (PHB) Produced by Novel Bacterium Lysinibacillus sphaericus BBKGBS6 Isolated From Soil

Author:: Gurubasappa G. Biradar; C. T. Shivasharana; Basappa B. Kaliwal
Source:: Journal of polymers and the environment 2018 v.26 no.4 pp. 1685-1701
ISSN:: 1566-2543
Subject:: Fourier transform infrared spectroscopy; Lysinibacillus sphaericus; X-ray diffraction; absorption; agricultural soils; bacteria; calorimetry; crystal structure; desiccants; enthalpy; equations; glass transition temperature; melting; models; molecular weight; nuclear magnetic resonance spectroscopy; oxygen; polyhydroxybutyrate; solvents; tensile strength; thermal analysis; viscosity; water vapor
Abstract:: ... The aim of the study was to characterization of polyhydroxybutyrate (PHB) produced by novel bacterium Lysinibacillus sphaericus BBKGBS6 isolated from soil. The present study reports that the strain L. sphaericus BBKGBS6, which was isolated from agricultural soil and is capable of producing PHB. Extraction of PHB was done by solvent extraction method. The results indicated the presence of crotonic ...
DOI:: 10.1007/s10924-017-1054-x
: https://doi.org/10.1007/s10924-017-1054-x

84. Characterization of Urea Encapsulated by Biodegradable Starch-PVA-Glycerol

Author:: Yip Hing Lum; Azizah Shaaban; Nona Merry M. Mitan; Mohd Fairuz Dimin; Noraiham Mohamad; Nadiah Hamid; Sian Meng Se
Source:: Journal of polymers and the environment 2013 v.21 no.4 pp. 1083-1087
ISSN:: 1566-2543
Subject:: Fourier transform infrared spectroscopy; biodegradability; biodegradation; composite materials; encapsulation; enthalpy; films (materials); glycerol; melting; mixing; polyvinyl alcohol; soil; starch; urea; water binding capacity; wet environmental conditions
Abstract:: ... The influence of the blending ratio of biodegradable starch/polyvinyl alcohol (PVA)/glycerol in encapsulating urea has been investigated. It is found that water absorption capacity increased approximately 135 % as the amounts of starch, PVA and glycerol in the composite film increase. Therefore, the swell ability of the composite film is increased and the urea is released from the composite film i ...
DOI:: 10.1007/s10924-012-0552-0
: https://doi.org/10.1007/s10924-012-0552-0

85. Characterization of citric acid/glycerol co-plasticized thermoplastic starch prepared by melt blending

Author:: Shi, Rui; Zhang, Zizheng; Liu, Quanyong; Han, Yanming; Zhang, Liqun; Chen, Dafu; Tian, Wei
Source:: Carbohydrate polymers 2007 v.69 no.4 pp. 748-755
ISSN:: 0144-8617
Subject:: Fourier transform infrared spectroscopy; X-ray diffraction; citric acid; crystal structure; esterification; glass transition temperature; glycerol; light scattering; melting; mixing; molecular weight; plasticizers; polyesters; retrogradation; starch; thermal stability; thermogravimetry; thermoplastics; viscosity
Abstract:: ... A novel citric acid (CA)–glycerol co-plasticized thermoplastic starch (CGTPS) was prepared by melt blending. The CA content varies from 10% to 40 wt%. Result from Fourier Transform Infrared spectroscopy (FTIR) show that partial esterification occurred during blending. The degrees of substitution and esterification increased as the CA content increased. Results from intrinsic viscosity measurement, ...
DOI:: 10.1016/j.carbpol.2007.02.010
: https://doi.org/10.1016/j.carbpol.2007.02.010

86. Characterization of the groove binding between di-(2-ethylhexyl) phthalate and calf thymus DNA

Author:: Song Li; Junhui Pan; Guowen Zhang; Jianjian Xu; Deming Gong
Source:: International journal of biological macromolecules 2017 v.101 pp. 736-746
ISSN:: 0141-8130
Subject:: Fourier transform infrared spectroscopy; algorithms; calves; chemometrics; circular dichroism spectroscopy; iodides; least squares; melting; molecular models; phthalates; single-stranded DNA; thymus gland; ultraviolet-visible spectroscopy; viscosity
Abstract:: ... In this study, the interaction between di-(2-ethylhexyl) phthalate (DEHP) and calf thymus DNA (ctDNA) was investigated by a combination of multispectroscopic methods, chemometrics algorithm, cyclic voltammetry and molecular simulation. The concentration profiles of the components obtained from resolving the UV–vis absorption data by multivariate curve resolution–alternating least-squares (MCR–ALS) ...
DOI:: 10.1016/j.ijbiomac.2017.03.136
: https://doi.org/10.1016/j.ijbiomac.2017.03.136

87. Chemical Recycling of PET Waste with Multifunctional Pentaerythrytol in the Melt State

Author:: Mendes, L. C.; Dias, M. L.; Rodrigues, T. C.
Source:: Journal of polymers and the environment 2011 v.19 no.1 pp. 254-262
ISSN:: 1566-2543
Subject:: Fourier transform infrared spectroscopy; X-radiation; alcohols; alcoholysis; bitumen; chemical structure; composite polymers; esterification; melting; recycling; thermal properties; wastes; zinc acetate
Abstract:: ... Chemical recycling of poly(ethylene terephthalate) PET waste in the melt state through alcoholysis with multifunctional alcohol--pentaerythrytol (PENTE)--was performed in a internal mixer Haake Rheomix 600, at 250 °C, 60 rpm, for 10 min, in presence of zinc acetate. The following PET:PENTE molar ratios 1:0; 1:0.16; 1:0.48 and 1:3.4 were studied. The chemical structure of the end-products was chara ...
DOI:: 10.1007/s10924-010-0276-y
: https://doi.org/10.1007/s10924-010-0276-y

88. Chemical and biophysical properties of gelatins extracted from the skin of octopus (Octopus vulgaris)

Author:: Mourad Jridi; Rim Nasri; Rabeb Ben Slama-Ben Salem; Imen Lassoued; Ahmed Barkia; Moncef Nasri; Nabil Souissi
Source:: Lebensmittel-Wissenschaft + Technologie 2015 v.60 no.2 pp. 881-889
ISSN:: 0023-6438
Subject:: Fourier transform infrared spectroscopy; Octopus vulgaris; adhesion; emulsifying properties; enzymatic treatment; foams; gel strength; gelatin; gelation; hardness; melting; molecular weight; pH; pepsin; peptides; temperature
Abstract:: ... Gelatins from alkali-pre-treated skin of Octopus (Octopus vulgaris) were extracted with different concentrations of pepsin at pH 2.0. The resulting octopus skin gelatins OSG0, OSG5, OSG10 and OSG15, extracted, respectively, without enzyme treatment or with 5, 10 and 15 U of pepsin/g alkaline treated skin were evaluated for gel strength, textural parameters, thermal and gelling properties. The yiel ...
DOI:: 10.1016/j.lwt.2014.10.057
: https://doi.org/10.1016/j.lwt.2014.10.057

89. Chemistry associated with natural rubber–graphene nanocomposites and its effect on physical and structural properties

Author:: Srinivasarao Yaragalla; Meera A.P.; Nandakumar Kalarikkal; Sabu Thomas
Source:: Industrial crops and products 2015 v.74 pp. 792-802
ISSN:: 0926-6690
Subject:: Fourier transform infrared spectroscopy; Raman spectroscopy; X-radiation; chemical interactions; equations; graphene; graphene oxide; industrial crops; melting; mixing; models; nanocomposites; oxygen; permeability; rubber; transmission electron microscopy
Abstract:: ... Thermally reduced graphene oxide (TRG) was incorporated into dry natural rubber (NR) an important industrial crop, by mechanical melt mixing method. Dramatic improvement in modulus (282%) and O2 gas barrier properties (175%) as compared to neat NR, was observed even at low loading (3% w/w) of TRG. The effect of morphology on physical properties of NR-TRG composites was evaluated and it was observe ...
DOI:: 10.1016/j.indcrop.2015.05.079
: https://doi.org/10.1016/j.indcrop.2015.05.079

90. Chlorinated polyethylene (CPE)/ethylene methacrylate copolymer (EMA)/sepiolite nanocomposite via a facile one-step covalent modification technique

Author:: Purabi Bhagabati; Tapan K. Chaki; Dipak Khastgir
Source:: RSC advances 2015 v.5 no.74 pp. 60294-60306
ISSN:: 2046-2069
Subject:: Fourier transform infrared spectroscopy; X-ray diffraction; composite polymers; contact angle; lactones; melting; mixing; nanocomposites; polyethylene; polymerization; sepiolite; temperature; tensile strength; thermal properties; thermogravimetry; transmission electron microscopy
Abstract:: ... The work reports a facile one step covalent modification technique of sepiolite needles by in situ polymerization of ε-caprolactone. The effective modification of sepiolite was confirmed by Fourier transform infrared (FTIR), X-ray diffraction (XRD), High Resolution-Transmission Electron Microscopy (HR-TEM) and water contact angle measurements. Nanocomposites of chlorinated polyethylene (CPE)/ethyl ...
DOI:: 10.1039/c5ra06488k
: https://doi.org/10.1039/c5ra06488k

91. Co-liquefaction of coal and polypropylene or polystyrene in hot compressed water at 360–430°C

Author:: Yuan Shen; Haiyan Wu; Zhiyan Pan
Source:: Fuel processing technology 2012 v.104 no. pp. 281-286
ISSN:: 0378-3820
Subject:: Fourier transform infrared spectroscopy; autoclaves; coal; cooling; heat; high performance liquid chromatography; hydrogen; hydrogenation; liquefaction; melting; oils; polypropylenes; polystyrenes; stainless steel; synergism; temperature
Abstract:: ... The co-liquefaction of coal and polypropylene or polystyrene in hot compressed water was carried out in a 50mL batch stainless steel autoclave reactor. The effects of the polymer ratios by weight (10–40%), reaction temperatures (360–430°C), and reaction time (30–120min) were investigated. The main products were analyzed qualitatively by Fourier transform infrared spectroscopy and high-performance ...
DOI:: 10.1016/j.fuproc.2012.05.023
: https://doi.org/10.1016/j.fuproc.2012.05.023

92. Cold storage condensation heat recovery system with a novel composite phase change material

Author:: Mingzhu Xia; Yanping Yuan; Xudong Zhao; Xiaoling Cao; Zhonghua Tang
Source:: Applied energy 2016 v.175 pp. 259-268
ISSN:: 0306-2619
Subject:: Fourier transform infrared spectroscopy; calorimeters; carnauba wax; cold storage; composite materials; endothermy; energy; energy conservation; graphene; heat production; heat recovery; latent heat; melting; recycling; refrigeration; scanning electron microscopes; scanning electron microscopy; solidification; temperature; thermal conductivity; water supply
Abstract:: ... Using condensation heat from cold storage refrigeration systems to provide heat for domestic hot water preparation and industrial hot water supply promotes energy conservation. However, few studies have investigated cold storage condensation heat recovery using phase change materials (PCMs). In this study, a cold storage condensation heat recovery system that uses PCMs has been designed and analys ...
DOI:: 10.1016/j.apenergy.2016.05.001
: https://doi.org/10.1016/j.apenergy.2016.05.001

93. Combination of TREF, high-temperature HPLC, FTIR and HPer DSC for the comprehensive analysis of complex polypropylene copolymers

Author:: Sadiqali Cheruthazhekatt; Thijs F. J. Pijpers; Vincent B. F. Mathot; Harald Pasch
Source:: Analytical and bioanalytical chemistry 2013 v.405 no.28 pp. 8995-9007
ISSN:: 1618-2642
Subject:: propylene; microstructure; ethylene; fractionation; melting; high performance liquid chromatography; differential scanning calorimetry; polyethylene; Fourier transform infrared spectroscopy; solvents; crystallization; composite polymers; temperature; polypropylenes; thermal properties
Abstract:: ... A novel, powerful analytical technique, preparative temperature rising elution fractionation (prep TREF)/high-temperature (HT)-HPLC/Fourier transform infrared spectroscopy (FTIR)/high-performance differential scanning calorimetry (HPer DSC)), has been introduced to study the correlation between the polymer chain microstructure and the thermal behaviour of various components in a complex impact pol ...
DOI:: 10.1007/s00216-013-6955-5
: https://doi.org/10.1007/s00216-013-6955-5

94. Combined stabilizers prepared from cellulose nanocrystals and styrene-maleic anhydride to microencapsulate phase change materials

Author:: Shenjie Han; Shaoyi Lyu; Zhilin Chen; Feng Fu; Siqun Wang
Source:: Carbohydrate polymers 2020 v.234 no. pp. -
ISSN:: 0144-8617
Subject:: Fourier transform infrared spectroscopy; X-ray diffraction; anhydrides; cellulose; chemical structure; crystallization; differential scanning calorimetry; droplets; emulsifiers; latent heat; manufacturing; melting; nanocrystals; polymerization; scanning electron microscopy; stabilizers; surfactants; thermogravimetry
Abstract:: ... Cellulose nanocrystals (CNCs) combined with styrene-maleic anhydride (SMA) as stabilizers were used to stabilize paraffin droplets for fabricating paraffin/melamine-urea-formaldehyde (MUF) microcapsules. Effects of mixed emulsifier of CNCs and SMA on the morphologies, chemical structures, and properties of paraffin/MUF microcapsules were characterized by Field emission scanning electron microscopy ...
DOI:: 10.1016/j.carbpol.2020.115923
CHORUS:: 10.1016/j.carbpol.2020.115923
: https://doi.org/10.1016/j.carbpol.2020.115923

95. Comparative Investigations on Optimum Polymerization Conditions for the Synthesis of a Sustainable Poly(Lactic Acid)

Author:: Mustafa Abu Ghalia; Yaser Dahman
Source:: Journal of polymers and the environment 2018 v.26 no.5 pp. 1903-1919
ISSN:: 1566-2543
Subject:: Fourier transform infrared spectroscopy; biodegradability; catalysts; condensation reactions; crystal structure; glass transition; melting; methane; moieties; molecular weight; nuclear magnetic resonance spectroscopy; polylactic acid; polymerization; response surface methodology; solvents; temperature; tin; viscosity
Abstract:: ... The development of synthetic biodegradable polymers using solvent free polymerization has a unique potential to be used as sustainable polymers in biomedical applications. The aim of this work was to synthesize and characterize a sustainable class of poly(lactic acid) (PLA) under different operating conditions via direct polycondensation of lactic acid (LA). Several parameters were tested includin ...
DOI:: 10.1007/s10924-017-1070-x
: https://doi.org/10.1007/s10924-017-1070-x

96. Comparative in vitro cytotoxicity and binding investigation of artemisinin and its biogenetic precursors with ctDNA

Author:: Neha Maurya; Khalid Imtiyaz; M. Moshahid Alam Rizvi; Khaled Mohamed Khedher; Prashant Singh; Rajan Patel
Source:: RSC advances 2020 v.10 no.41 pp. 24203-24214
ISSN:: 2046-2069
Subject:: DNA; Fourier transform infrared spectroscopy; absorbance; artemisinin; cell lines; circular dichroism spectroscopy; computational methodology; computer simulation; cytotoxicity; growth retardation; hydrogen bonding; medicinal plants; melting; neoplasm cells; neoplasms; thermodynamics; van der Waals forces; voltammetry
Abstract:: ... Artemisinin (ART) and its biogenetic precursors artemisinic acid (AA) and dihydroartemisinic acid (DHAA) are important traditional medicinal herb compounds with tumor growth inhibition properties. Herein, we have studied the cytotoxicity of ART, AA, and DHAA on different cancer cell lines (H1299, A431, and HCT 116) and investigated in detail their binding mechanisms with ctDNA by using spectroscop ...
DOI:: 10.1039/d0ra02042g
: https://doi.org/10.1039/d0ra02042g

97. Comparative oxo-biodegradation study of poly-3-hydroxybutyrate-co-3-hydroxyvalerate/polypropylene blend in controlled environments

Author:: Farha Masood; Tariq Yasin; Abdul Hameed
Source:: International Biodeterioration & Biodegradation 2014 v.87 pp. 1-8
ISSN:: 0964-8305
Subject:: Fourier transform infrared spectroscopy; biodegradability; composite polymers; food packaging; industry; melting; microbial activity; mixing; polypropylenes; scanning electron microscopy; soil; thermal stability; thermogravimetry
Abstract:: ... The potential use of poly-3-hydroxybutyrate-co-3-hydroxyvalerate (PHBV) copolymer as a biodegradable additive in polypropylene (PP) has been explored. The melt blending technique was used to produce the blend of PHBV/PP (PB10). The degradation studies of PB10 were done in the field as well as in controlled laboratory conditions. The structural changes were studied using scanning electron microscop ...
DOI:: 10.1016/j.ibiod.2013.09.023
: https://doi.org/10.1016/j.ibiod.2013.09.023

98. Comparative study of the photochemical stability of HDPE/Ag composites

Author:: Ifigenia Grigoriadou; Eleni Pavlidou; Kostas M. Paraskevopoulos; Zoi Terzopoulou; Dimitrios N. Bikiaris
Source:: Polymer degradation and stability 2018 v.153 pp. 23-36
ISSN:: 0141-3910
Subject:: Fourier transform infrared spectroscopy; cleavage (chemistry); crystal structure; mass spectrometry; melting; mixing; nanoparticles; photooxidation; polyethylene; relative humidity; silver; temperature; tensile strength; thermal degradation; ultraviolet radiation
Abstract:: ... In the present study, HDPE composites containing different concentrations of silver (Ag) nanoparticles (0.5%, 1%, 2%, 3%, and 5 wt%) were prepared by melt mixing on a Haake-Buchler Reomixer. Composites in the form of thin films were exposed to UV irradiation at 280 nm at constant temperature (25 °C) and relative humidity (50%) for several hours. The samples were characterized for their photochemic ...
DOI:: 10.1016/j.polymdegradstab.2018.04.016
: https://doi.org/10.1016/j.polymdegradstab.2018.04.016

99. Comparative thermal, biological and photodegradation kinetics of polylactide and effect on crystallization rates

Author:: L. Santonja-Blasco; A. Ribes-Greus; R.G. Alamo
Source:: Polymer degradation and stability 2013 v.98 no.3 pp. 771-784
ISSN:: 0141-3910
Subject:: Fourier transform infrared spectroscopy; biodegradation; cold; crystallites; crystallization; energy; equations; excision; melting; molecular weight; photolysis; polylactic acid; temperature
Abstract:: ... A comparison is made between available literature and present results of the three major types of polylactide (PLA) degradation giving a compiled view on the details of degradation mechanisms with relation to explicit factors affecting degradation. The temporal decrease of molar mass has been analyzed under isothermal conditions at 220 °C, biological and photodegradation conditions using a polylac ...
DOI:: 10.1016/j.polymdegradstab.2012.12.012
: https://doi.org/10.1016/j.polymdegradstab.2012.12.012

100. Comparison of Adipic Versus Renewable Azelaic Acid Polyester Polyols as Building Blocks in Soft Thermoplastic Polyurethanes

Author:: Norhayati Mohd Noor; Aisa Sendijarevic; Vahid Sendijarevic; Ibrahim Sendijarevic; Tuan Noor Maznee Tuan Ismail; Mohd Azmil Mohd Noor; Yeong Shoot Kian; Hazimah Abu Hassan
Source:: The journal of the American Oil Chemists' Society 2016 v.93 no.11 pp. 1529-1540
ISSN:: 0003-021X
Subject:: Fourier transform infrared spectroscopy; adipic acid; ambient temperature; diethylene glycol; differential scanning calorimetry; esterification; fermentation; melting; molecular weight; polyesters; polyols; polyurethanes; separation; sugars; thermoplastics
Abstract:: ... In this study, novel polyester diols of 2000 molecular weight (MW) were synthesized by reacting azelaic acid (AZ) with 1,3-propanediol (1,3-PDO) and diethylene glycol (DEG) in the esterification reaction catalyzed with a small amount of butyltintris(2-ethylhexanoate). As a reference, polyester polyols of 2000 MW were synthesized from adipic acid (AA) with 1,3-PDO and DEG. The properties of polyest ...
DOI:: 10.1007/s11746-016-2903-9
: https://doi.org/10.1007/s11746-016-2903-9

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1. 027 Temperature-dependent tolerance to hypotonic stress and cryosurvival of stallion sperm

2. 2,2,2-Trifluoroethanol disrupts the triple helical structure and self-association of type I collagen

3. 3D structure fungi-derived carbon stabilized stearic acid as a composite phase change material for thermal energy storage

4. 5-Carboxylcytosine and Cytosine Protonation Distinctly Alter the Stability and Dehybridization Dynamics of the DNA Duplex

5. 9-O-N-aryl/arylalkyl amino carbonyl methyl substituted berberine analogues induce self-structure in polyadenylic acid

6. A Facile and Efficient Method for Preparing Chain Extended Poly(lactic acid) Foams with High Volume Expansion Ratio

7. A Novel Bio-based Polyaspartic Acid Copolymer: Synthesis, Structure and Performance of Degradation

8. A Novel Biodegradable Green Poly(L: -Aspartic Acid-Citric Acid) Copolymer for Antimicrobial Applications

9. A Novel Bioresidue to Compatibilize Sodium Montmorillonite and Linear Low Density Polyethylene

10. A Recycling-Focused Assessment of the Oxidative Thermomechanical Degradation of HDPE Melt Containing Pro-oxidant

11. A THEIC-based polyphosphate melamine intumescent flame retardant and its flame retardancy properties for polylactide

12. A correlation between formation enthalpy and ionic conductivity in perovskite-structured Li₃ₓLa₀.₆₇₋ₓTiO₃ solid lithium ion conductors

13. A facile method for the production of SnS thin films from melt reactions

14. A facile, fast, and low-cost method for fabrication of micro/nano-textured superhydrophobic surfaces

15. A kinked unit-containing thermotropic liquid crystalline copolyester with low glass transition temperature and broad phase transition temperature

16. A n-octadecane/hierarchically porous TiO2 form-stable PCM for thermal energy storage

17. A new strategy for preparation of long-chain branched polypropylene via reactive extrusion with supercritical CO2 designed for an improved foaming approach

18. A novel Schiff-base polyphosphate ester: Highly-efficient flame retardant for polyurethane elastomer

19. A novel biodegradable phosphorus-containing copolyester with preferable flame retardancy and mechanical properties

20. A novel efficient halogen-free flame retardant system for polycarbonate

21. A novel melt stable and high tensile strength biopolymer (polyhydroxyalkanoates) from Bacillus megaterium (MTCC10086) and its characterization

22. A novel phthalonitrile monomer with low post cure temperature and short cure time

23. A novel polynary fatty acid/sludge ceramsite composite phase change materials and its applications in building energy conservation

24. A novel supramolecular polymer fabricated via stronger hydrogen-bonding interactions between substituted amide groups: design, synthesis, properties and mechanism

25. A phosphorus-containing thermotropic liquid crystalline copolyester with low mesophase temperature and high flame retardance

26. A physically stabilized amorphous solid dispersion of nisoldipine obtained by hot melt extrusion

27. A practical way of grafting maleic anhydride onto polypropylene providing high anhydride contents without sacrificing excessive molar mass

28. A promising TNT alternative 3,3′-bi(1,2,4-oxadiazole)-5,5′-diylbis(methylene)dinitrate (BOM): thermal behaviors and eutectic characteristics

29. A safer route for preparation of anion exchange membrane from inter-polymer film and performance evaluation in electrodialytic application

30. A series of electrospun fatty acid ester/polyacrylonitrile phase change composite nanofibers as novel form-stable phase change materials for storage and retrieval of thermal energy

31. A study on mediating the crystallization behavior of PBT through intermolecular hydrogen-bonding

32. A study on melt grafting of maleic anhydride onto low-density polyethylene and its blend with polyamide 6

33. A study on the nature of intermolecular links in the cryotropic weak gels of hyaluronan

34. A temperature-responsive poly(vinyl alcohol) gel for controlling fluidity of an inorganic phase change material

35. Accelerated Weathering and UV Protection-Ability of Poly(lactic acid) Nanocomposites Containing Zinc Oxide Treated Halloysite Nanotube

36. Accelerated laboratory weathering of polypropylene composites filled with synthetic silicon-based compounds

37. Accessing the Physical State and Molecular Mobility of Naproxen Confined to Nanoporous Silica Matrixes

38. Acetylation of corn distillers dried grains

39. Active Chicken Meat Packaging Based on Polylactide Films and Bimetallic Ag–Cu Nanoparticles and Essential Oil

40. Additively Manufactured and Surface Biofunctionalized Porous Nitinol

41. Aliphatic thermoplastic polyurethane-ureas and polyureas synthesized through a non-isocyanate route

42. Aminolysis of poly(ethylene terephthalate) waste with ethylenediamine and characterization of α,ω-diamine products

43. Aminopropyl-functionalized cubic Ia3d mesoporous silica nanoparticle as an efficient support for immobilization of superoxide dismutase

44. An Investigation of Polyamides Based on Isoidide-2,5-dimethyleneamine as a Green Rigid Building Block with Enhanced Reactivity

45. An experimental investigation into the gasification reactivity and structure of agricultural waste chars

46. Antibacterial silver nanoparticles in polyvinyl alcohol/sodium alginate blend produced by gamma irradiation

47. Application of FTIR spectra for evaluating interfacial reactions in metal matrix composites

48. Application of the combination of ball-milling and hot-melt extrusion in the development of an amorphous solid dispersion of a poorly water-soluble drug with high melting point

49. Aromatic poly(ether ester)s derived from a naturally occurring building block nipagin and linear aliphatic α,ω-diols

50. Assessment of localization and degradation of ZnO nano-particles in the PLA/PCL biocompatible blend through a comprehensive rheological characterization

51. Beeswax organogels: Influence of gelator concentration and oil type in the gelation process

52. Binding effects and mechanisms of the carboxymethyl starch modified with nano-CaCO3 in magnetite concentrate pellets

53. Binding properties of butylated hydroxytoluene with calf thymus DNA in vitro

54. Binding properties of herbicide chlorpropham to DNA: Spectroscopic, chemometrics and modeling investigations

55. Biodegradable Blends from Corn Gluten Meal and Poly(butylene adipate-co-terephthalate) (PBAT): Studies on the Influence of Plasticization and Destructurization on Rheology, Tensile Properties and Interfacial Interactions

56. Biodegradable Copoly(Amino Acid)s Based on 6-Aminocaproic Acid and l-Leucine

57. Biodegradable PEG/cellulose, PEG/agarose and PEG/chitosan blends as shape stabilized phase change materials for latent heat energy storage

58. Biodegradable Polyester-Based Blend Reinforced with CurauÃ¡ Fiber: Thermal, Mechanical and Biodegradation Behaviour

59. Biodegradable Polymeric Films Incorporated with Nisin: Characterization and Efficiency against Listeria monocytogenes

60. Biodegradable Polymers from 5-Hydroxylevulinic Acid: 1. Synthesis and Characterization of Poly(5-hydroxylevulinic acid)

61. Biodegradable and Bio-based Green Blends from Carbon Dioxide-Derived Bioplastic and Poly(Butylene Succinate)

62. Biodegradable biopolymer–graphene nanocomposites

63. Biodegradable block poly(ester-urethane)s based on poly(3-hydroxybutyrate-co-4-hydroxybutyrate) copolymers

64. Biodegradation of Pro-oxidant Filled Polypropylene Films and Evaluation of the Ecotoxicological Impact

65. Biodegradation of poly(lactic acid) and some of its based systems with Trichoderma viride

66. Biopolymer blends from hardwood lignin and bio-polyamides: Compatibility and miscibility

67. Biosynthesis and accumulation of poly(3-hydroxybutyrate-co-3-hydroxyvalerate)-polyethylene glycol, a hybrid co-polymer by endophytic Bacillus cereus RCL 02

68. Biosynthesis and characterization of polyhydroxyalkanoates produced by an extreme halophilic bacterium, Halomonas nitroreducens, isolated from hypersaline ponds

69. Biotic degradation of poly(dl-lactide) based nanocomposites

70. Broad NIR emission near c - Si band gap from Bi-doped Ba–Al metaphosphate glasses as promising solar spectral converter