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1. Experimental studies on hydrogen hydrate with tetrahydrofuran by differential scanning calorimeter and in-situ Raman

Author:
Cai, Jing; Tao, Yuan-Qing; von Solms, Nicolas; Xu, Chun-Gang; Chen, Zhao-Yang; Li, Xiao-Sen
Source:
Applied energy 2019 v.243 pp. 1-9
ISSN:
0306-2619
Subject:
differential scanning calorimetry,   etc   ; aqueous solutions; hydrogen; temperature; tetrahydrofuran; thermal properties;     Show all 6 Subjects
Abstract:
... Clathrate hydrate is a kind of environment-friendly material for storing hydrogen under a certain condition of temperature and pressure. In this work, tetrahydrofuran aqueous solution with concentration of 3.0 mol% was adopted to investigate hydrogen storage process. Moreover, thermal property of hydrate was measured by high pressure differential scanning calorimeter, and mechanism of hydrate-base ...
DOI:
10.1016/j.apenergy.2019.03.179

2. Entropic effect implication for change in polymer coils swelling state in the demixing enthalpy recovery of aqueous poly(vinyl methyl ether) solutions

Author:
Song, Li; Lin, Jiaxiang; He, Yang; Li, Jingqing; Sheng, Jing; Jiang, Shichun; Huang, Dinghai
Source:
Journal of polymer science 2019 v.57 no.3 pp. 142-151
ISSN:
0887-6266
Subject:
differential scanning calorimetry,   etc   ; enthalpy; infrared spectroscopy; methyl ethers; polymers; separation;     Show all 6 Subjects
Abstract:
... Time‐dependent demixing enthalpy recovery behavior of aqueous poly(vinyl methyl ether) (PVME) solutions exhibits distinct recovery characteristics in three concentration regions. The absence of recovery behavior below a water concentration of 38.3 wt % indicates that the PVME coil is in a globular state. The typically sigmoidal recovery behavior of demixing enthalpy above 38.3 wt % is ascribed to ...
DOI:
10.1002/polb.24765

3. Characterization of polymers based on differential scanning calorimetry based techniques

Author:
Drzeżdżon, Joanna; Jacewicz, Dagmara; Sielicka, Alicja; Chmurzyński, Lech
Source:
Trends in analytical chemistry 2019 v.110 pp. 51-56
ISSN:
0165-9936
Subject:
differential scanning calorimetry,   etc   ; industry; packaging; strength (mechanics); thermal properties; thermoplastics;     Show all 6 Subjects
Abstract:
... Polymers have a wide range of applications, in the production of packaging, medical and the automotive industries. Due to the ample and large-scale usage of polymers in various industries, scientists are now looking for novel polymer materials with thermoplastic properties or with the high mechanical strength while, maintaining a lightweight.Differential Scanning Calorimetry (DSC) based techniques ...
DOI:
10.1016/j.trac.2018.10.037

4. Hydration shells of carbohydrate polymers studied by calorimetry and terahertz spectroscopy

Author:
Morales-Hernández, Jose Antonio; Singh, Abhishek K.; Villanueva-Rodriguez, Socorro Josefina; Castro-Camus, Enrique
Source:
Food chemistry 2019 v.291 pp. 94-100
ISSN:
0308-8146
Subject:
differential scanning calorimetry,   etc   ; absorbance; additives; aqueous solutions; beverages; glass transition temperature; inulin; maltodextrins; models; polymers; spectroscopy;     Show all 11 Subjects
Abstract:
... We present a study of the hydration shells of some carbohydrate polymers of commercial and biological importance, namely, agave fructans, inulin, and maltodextrin, employing terahertz time-domain spectroscopy and differential scanning calorimetry. We observe that the hydration numbers calculated using terahertz spectroscopy are marginally higher than those of the calorimetric values. We attribute ...
DOI:
10.1016/j.foodchem.2019.03.132

5. Protective effect of hydroxytyrosol and rosemary extract in a comparative study of the oxidative stability of Echium oil

Author:
Bañares, Celia; Martin, Diana; Reglero, Guillermo; Torres, Carlos F.
Source:
Food chemistry 2019 v.290 pp. 316-323
ISSN:
0308-8146
Subject:
differential scanning calorimetry,   etc   ; Echium; antioxidants; oxidation; oxidative stability; polar compounds; protective effect; rosemary; temperature; vegetable oil;     Show all 10 Subjects
Abstract:
... The oxidative stability of Echium oil has been studied by two accelerated oxidation methodologies namely Rancimat and differential scanning calorimetry at selected temperatures in the range 50–110 °C. Kinetic analyses have provided Arrhenius parameters, oxidative stability indexes (OSI), temperature coefficients (tcoef), Q10 and OSI at 20 °C (OSI20) for both methodologies focussing on secondary an ...
DOI:
10.1016/j.foodchem.2019.03.141

6. The effect of temperature on the separation of enantiomers with coated and covalently immobilized polysaccharide-based chiral stationary phases

Author:
Matarashvili, Iza; Kobidze, Giorgi; Chelidze, Aluda; Dolidze, Gizo; Beridze, Nino; Jibuti, Giorgi; Farkas, Tivadar; Chankvetadze, Bezhan
Source:
Journal of chromatography 2019 v.1599 pp. 172-179
ISSN:
0021-9673
Subject:
differential scanning calorimetry,   etc   ; chemical bonding; enantiomers; high performance liquid chromatography; liquids; polysaccharides; temperature; thermodynamics;     Show all 8 Subjects
Abstract:
... This article describes our attempt to re-visit the role of temperature in the separation of enantiomers with polysaccharide-based chiral columns in high-performance liquid chromatography (HPLC). Rarely observed increased retention and separation factors with increasing temperature, as well as temperature dependent reversal of enantiomer elution order are reported for several arylpropionic acid der ...
DOI:
10.1016/j.chroma.2019.04.024

7. Characterizing the sludge moisture distribution during anaerobic digestion process through various approaches

Author:
Zhang, Wei; Xu, Ying; Dong, Bin; Dai, Xiaohu
Source:
The Science of the total environment 2019 v.675 pp. 184-191
ISSN:
0048-9697
Subject:
differential scanning calorimetry,   etc   ; anaerobic digestion; dewatering; drying; nuclear magnetic resonance spectroscopy; sludge; thermogravimetry; water content;     Show all 8 Subjects
Abstract:
... Exploring moisture distribution plays an important role in improving sludge dewatering. However, the moisture content usually varies based on the measurements, and a comparison of various measurement methods for the same sample during the anaerobic digestion (AD) process is lacking. In this study, the moisture distributions of two types of sludge samples with different digestion times during the A ...
DOI:
10.1016/j.scitotenv.2019.04.095

8. Investigating the thermal runaway mechanisms of lithium-ion batteries based on thermal analysis database

Author:
Feng, Xuning; Zheng, Siqi; Ren, Dongsheng; He, Xiangming; Wang, Li; Cui, Hao; Liu, Xiang; Jin, Changyong; Zhang, Fangshu; Xu, Chengshan; Hsu, Hungjen; Gao, Shang; Chen, Tianyu; Li, Yalun; Wang, Tianze; Wang, Hao; Li, Maogang; Ouyang, Minggao
Source:
Applied energy 2019 v.246 pp. 53-64
ISSN:
0306-2619
Subject:
differential scanning calorimetry,   etc   ; anodes; cathodes; databases; energy density; heat; lithium batteries; models; redox reactions; temperature;     Show all 10 Subjects
Abstract:
... The cause of the thermal runaway problem in lithium-ion batteries problem is still unclear. This bottle neck has prevented increases in the energy density of lithium-ion batteries, of which the technology may stagnate for many years. The diversity of cell chemistries makes this problem more difficult to analyze. This paper reports work conducted by Tsinghua University and its collaborators into th ...
DOI:
10.1016/j.apenergy.2019.04.009

9. Characterization of amylose and amylopectin fractions separated from potato, banana, corn, and cassava starches

Author:
Lemos, Paulo Vitor França; Barbosa, Leandro Santos; Ramos, Ingrid Graça; Coelho, Rodrigo Estevam; Druzian, Janice Izabel
Source:
International journal of biological macromolecules 2019 v.132 pp. 32-42
ISSN:
0141-8130
Subject:
differential scanning calorimetry,   etc   ; amylopectin; amylose; bananas; butanol; corn; iodine; molecular weight; potatoes; spectroscopy; thermal properties; thermogravimetry;     Show all 12 Subjects
Abstract:
... Analytical techniques such HPSEC, DSC, and TGA have been employed for amylose determination in starch samples, though spectrophotometry by iodine binding is most commonly used. The vast majority of these techniques require an analytical curve, using amylose and amylopectin standards with physicochemical properties similar to those found in the original starch. The current study aimed to obtain the ...
DOI:
10.1016/j.ijbiomac.2019.03.086

10. Thermal energy storage and thermodynamic properties of (E)-3-m-tolylbut-2-enoic acid as a medium temperature phase change material

Author:
Zeng, Ju-Lan; Zhang, Yu-Xiang; Xie, Ting; Shu, Li; Jiang, Liu-Mo; Li, Kun-Yu; Wang, Shao-Fen; Sun, Li-Xian
Source:
International journal of green energy 2019 v.16 no.6 pp. 468-475
ISSN:
1543-5083
Subject:
differential scanning calorimetry,   etc   ; absorption; cooling; crystallization; enthalpy; heat; melting; supercooling; temperature; thermal energy; thermal stability;     Show all 11 Subjects
Abstract:
... Phase change materials (PCMs) that can store and release heat energy over the temperature range from 363 to 393 K are crucial for solar absorption cooling, and it is worthy to seek new solid-liquid PCMs candidates that melt and crystallize in this temperature range. In this paper, (E)-3-m-tolylbut-2-enoic acid (mTBEA) was applied as a PCM candidate. Its thermal energy storage properties and therma ...
DOI:
10.1080/15435075.2019.1580197

11. Aliphatic copolyamide nanocomposites: Isothermal crystallization and crystalline morphology induced by clays

Author:
Grigoraş, Vasile Cristian
Source:
Thermochimica acta 2019 v.675 pp. 77-83
ISSN:
0040-6031
Subject:
differential scanning calorimetry,   etc   ; bentonite; clay; crystallization; crystals; montmorillonite; nanocomposites; small-angle X-ray scattering;     Show all 8 Subjects
Abstract:
... Isothermal crystallization of the nanocomposites based on aliphatic copolyamide (CoPA) containing bentonite (Btn), activated (K10) or organic modified montmorillonite (I30 P) clay were investigated using Differential Scanning Calorimetry (DSC) analysis. Results from the dynamic crystallization process denoted an improvement of the nucleation process, induced rather by K10 or I30 P clays than Btn c ...
DOI:
10.1016/j.tca.2019.03.018

12. Nonisothermal curing kinetics of solid resole by differential scanning calorimetry

Author:
Chaiwan, Pattarakamon; Kaewkittinarong, Assawin; Pumchusak, Jantrawan
Source:
Thermochimica acta 2019 v.675 pp. 119-126
ISSN:
0040-6031
Subject:
differential scanning calorimetry,   etc   ; activation energy; catalysts; crosslinking; formaldehyde; phenol; sodium hydroxide; thermal stability; thermogravimetry;     Show all 9 Subjects
Abstract:
... In this work, solid resoles with different formaldehyde (F) to phenol (P) molar ratios and various contents of hexamethylenetetramine (HMTA, accelerator) and sodium hydroxide (NaOH, catalyst) were designed and characterized. Curing behavior was investigated by differential scanning calorimetry to provide useful insights for applications. Curing kinetics were analyzed by the Vyazovkin isoconversion ...
DOI:
10.1016/j.tca.2019.03.023

13. Poly (N-isopropylacrylamide) based hydrogels as novel precipitation and stabilization media for solid lipid nanoparticles (SLNs)

Author:
Jadhav, Sushilkumar A.; Brunella, Valentina; Sapino, Simona; Caprarelli, Bruno; Riedo, Chiara; Chirio, Daniela; Gallarate, Marina
Source:
Journal of colloid and interface science 2019 v.541 pp. 454-460
ISSN:
0021-9797
Subject:
differential scanning calorimetry,   etc   ; crosslinking; hydrogels; lipids; nanocomposites; nanoparticles; scanning electron microscopy;     Show all 7 Subjects
Abstract:
... In this work, poly(N-isopropylacrylamide) (PNIPAM) based chemically cross-linked hydrogels are used as novel precipitation and stabilization media for solid lipid nanoparticles (SLNs) for the first time. The hydrogels and the hybrid thermoresponsive composite hydrogels with SLNs were characterized by SEM, DSC, DLS and rheometric analysis. The results showed that the SLNs obtained directly in the g ...
DOI:
10.1016/j.jcis.2019.01.107

14. Effect of high cooling and shear rate on the microstructural development of hybrid systems containing diacylglycerols and triacylglycerols of palm origin

Author:
Tavernier, Iris; Norton, Ian T.; Rimaux, Tom; Lazidis, Aris; Dewettinck, Koen
Source:
Journal of food engineering 2019 v.246 pp. 141-152
ISSN:
0260-8774
Subject:
differential scanning calorimetry,   etc   ; X-ray diffraction; cooling; crystallization; diacylglycerols; heat exchangers; processing technology; shortenings; texture; triacylglycerols;     Show all 10 Subjects
Abstract:
... This research explores the potential of diacylglycerol (DAG) and triacylglycerol (TAG) combinations in shortenings. An alternative formulation of a fat blend alters the crystallization behavior, which was investigated with differential scanning calorimetry (DSC) and synchrotron X-ray diffraction. DSC experiments demonstrated that by replacing TAGs with DAGs, crystallization had an earlier onset. H ...
DOI:
10.1016/j.jfoodeng.2018.11.009

15. Heat capacity and enthalpy of indapamide

Author:
Skotnicki, M.; Drogoń, A.; Calvin, J.J.; Rosen, P.F.; Woodfield, B.F.; Pyda, M.
Source:
Thermochimica acta 2019 v.674 pp. 36-43
ISSN:
0040-6031
Subject:
differential scanning calorimetry,   etc   ; enthalpy; glass transition; heat; liquids; melting point; regression analysis; temperature; theoretical models;     Show all 9 Subjects
Abstract:
... The heat capacities and total enthalpy of anhydrous indapamide (IND, CAS no.: 26807-65-8) are reported from temperature 1.84 to 523.15 K measured by a Quantum Design Physical Property Measurement System® (PPMS) and differential scanning calorimetry (DSC). The low-temperature experimental heat capacities of crystalline IND from 1.84 to 302.65 K were measured by PPMS and fit to a theoretical model i ...
DOI:
10.1016/j.tca.2019.01.032

16. Synergistic Effect of Talc and Titanium Dioxide on Poly(lactic acid) Crystallization: An Investigation on the Injection Molding Cycle Time Reduction

Author:
Petchwattana, Nawadon; Narupai, Borwon
Source:
Journal of polymers and the environment 2019 v.27 no.4 pp. 837-846
ISSN:
1566-2543
Subject:
differential scanning calorimetry,   etc   ; crystal structure; crystallization; polylactic acid; synergism; talc; titanium dioxide;     Show all 7 Subjects
Abstract:
... Injection molding cycle time is one of very important parameters relating to the plastic production rate. In neat poly(lactic acid) (PLA), it requires more than 25 min to obtain its half crystallinity (t₁/₂). This indicates that the injection molding of neat PLA with high degree of crystallinity (Xc) and high production rate is impossible. This research aims to increase the crystallization rate of ...
DOI:
10.1007/s10924-019-01396-0

17. Thermodynamic investigation of thorium and strontium substituted monazite solid-solution

Author:
Rawat, D.; Phapale, S.; Mishra, R.; Dash, S.
Source:
Thermochimica acta 2019 v.674 pp. 10-20
ISSN:
0040-6031
Subject:
differential scanning calorimetry,   etc   ; cations; enthalpy; heat; lanthanum; oxides; solid solutions; strontium; temperature; thorium;     Show all 10 Subjects
Abstract:
... In this paper, we report synthesis and characterization of thorium and strontium substituted synthetic monazite solid-solutions of general formula La1-xSrx/2Thx/2PO4 (0≤x≤1) using solid-state synthesis route and described the influence of charged coupled (Sr2+, Th4+) substitution in place of La3+ on their thermodynamic stability. High temperature calorimetry has been employed to determine the stan ...
DOI:
10.1016/j.tca.2019.01.031

18. Critical Point of Fluid Confined in Nanopores: Experimental Detection and Measurement

Author:
Tan, Sugata P.; Qiu, Xingdong; Dejam, Morteza; Adidharma, Hertanto
Source:
Journal of physical chemistry 2019 v.123 no.15 pp. 9824-9830
ISSN:
1932-7455
Subject:
differential scanning calorimetry,   etc   ; carbon dioxide; ethane; heat; nanopores; physical chemistry; prediction;     Show all 7 Subjects
Abstract:
... For the first time, the presence of the critical point (CP) of fluids confined in nanopores is unambiguously demonstrated and measured using a differential scanning calorimeter with an isochoric cooling procedure. The behavior of the CP of CO₂ and C₂H₆ in SBA-15 is found to deviate from theoretical predictions. The heat involved in capillary condensation is also discussed. The new and simple metho ...
DOI:
10.1021/acs.jpcc.9b00299

19. Evolution of Polymorphic Structure in β-Nucleated Isotactic Polypropylene under a Certain Pressure: Effects of Temperature and Flow

Author:
Lin, Jian-Mei; Li, Yue; Xu, Ling; Hua, Wen-Qiang; Yang, Shu-Gui; Bian, Feng-Gang; Lei, Jun; Li, Zhong-Ming
Source:
Industrial & engineering chemistry process design and development 2019 v.58 no.14 pp. 5677-5685
ISSN:
1520-5045
Subject:
differential scanning calorimetry,   etc   ; X-ray scattering; crystallization; polypropylenes; process design; shear strength; temperature;     Show all 7 Subjects
Abstract:
... Isotactic polypropylene (iPP) is one of the most intensively investigated polymeric materials for a long time because of its special polymorphism. In this work, the effects of temperature and flow on the evolution of polymorphic structure in β-nucleated iPP under 100 MPa were studied by X-ray scattering techniques and differential scanning calorimetry (DSC). It was found that the evolution of poly ...
DOI:
10.1021/acs.iecr.8b06160

20. Liquid crystalline epoxy resin with improved thermal conductivity by intermolecular dipole–dipole interactions

Author:
Jeong, Iseul; Kim, Chae Bin; Kang, Dong‐Gue; Jeong, Kwang‐Un; Jang, Se Gyu; You, Nam‐Ho; Ahn, Seokhoon; Lee, Dai‐Soo; Goh, Munju
Source:
Journal of polymer science 2019 v.57 no.6 pp. 708-715
ISSN:
0887-624X
Subject:
differential scanning calorimetry,   etc   ; X-ray diffraction; anisotropy; epoxides; heat; light microscopy; liquids; polymers; resins; thermal conductivity;     Show all 10 Subjects
Abstract:
... To address tremendous needs for developing efficiently heat dissipating materials with lightweights, a series of liquid crystalline epoxy resins (LCEs) are designed and synthesized as thermally conductive matrix. All prepared LCEs possess epoxies at the molecular side positions and cyanobiphenyl mesogenic end groups. Based on several experimental results such as differential scanning calorimetry, ...
DOI:
10.1002/pola.29315