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You searched for: Journal name RSC advances Remove constraint Journal name: RSC advances Subject term X-ray diffraction Remove constraint Subject term: X-ray diffraction Subject term crystals Remove constraint Subject term: crystals Subject term differential scanning calorimetry Remove constraint Subject term: differential scanning calorimetry
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1. Centimeter-scale giant spherulites in mixtures of polar polymers and crystallizable diluents: Morphology, structure, formation and application

Author:
Qing-Yun Wu; Ling-Shu Wan; Zhi-Kang Xu
Source:
RSC advances 2013 v.3 no.38 pp. 17105-17112
ISSN:
2046-2069
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; calcium carbonate; cellulose; cellulose acetate; crystallization; crystals; differential scanning calorimetry; dimethyl sulfoxide; light microscopy; maleic anhydrides; microstructure; polyacrylonitrile; scanning electron microscopy; wide-angle X-ray scattering
Abstract:
... A series of giant spherulites at centimetre scale were effectively constructed from the mixtures of polyacrylonitrile (PAN)/dimethyl sulfone (DMSO2), although neither PAN nor DMSO2 itself forms spherical morphology during crystallization. A detailed investigation was carried out on the morphology, microstructure, and formation mechanism by polarized optical microscopy, scanning electron microscopy ...
DOI:
10.1039/c3ra41034j

2. Crystallization and temperature-dependent structure deflection of C₆mimBr ionic liquid intercalated in LAPONITE®

Author:
Fangling Jiang; Cheng Li; Xiaojing Guo; Haiying Fu; Guozhong Wu; Shimou Chen
Source:
RSC advances 2016 v.6 no.100 pp. 98018-98025
ISSN:
2046-2069
Subject:
X-ray absorption spectroscopy; X-ray diffraction; ambient temperature; bromine; cations; crystal structure; crystallization; crystals; differential scanning calorimetry; hydrogen bonding; ionic liquids; nanopores; physicochemical properties; transmission electron microscopy
Abstract:
... The physicochemical properties of large molecules confined in nanopores are expected to be different from those of the bulk. This study investigates the cation–anion relative position and the molecular orientation of the 1-hexyl-3-methylimidazolium bromide (C₆mimBr) ionic liquid intercalated in LAPONITE® by a temperature-dependent X-ray absorption fine structure (XAFS) and some traditional methods ...
DOI:
10.1039/c6ra18618a

3. Effect of molecular weight of polyethylene glycol on crystallization behaviors, thermal properties and tensile performance of polylactic acid stereocomplexes

Author:
Ruilong Li; Yifan Wu; Zhuyu Bai; Jianbing Guo; Xiaolang Chen
Source:
RSC advances 2020 v.10 no.69 pp. 42120-42127
ISSN:
2046-2069
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; composite polymers; crystallization; crystals; differential scanning calorimetry; heat tolerance; light microscopy; melting point; molecular weight; polyethylene glycol; polylactic acid; tensile strength; testing; thermal properties; thermogravimetry
Abstract:
... In this work, the poly(d-lactic acid)–polyethylene glycol–poly(d-lactic acid) (PDLA–PEG–PDLA) triblock copolymer as a novel modification agent was incorporated into poly(l-lactic acid) (PLLA) to improve the thermal and mechanical properties of PLLA. The influences of molecular weight of PEG in the triblock copolymer on the structure, crystallization behaviors, heat resistance and tensile propertie ...
DOI:
10.1039/d0ra08699a

4. Epitaxial crystallization of precisely bromine-substituted polyethylene induced by carbon nanotubes and graphene

Author:
Weijun Miao; Bingjie Wang; Yiguo Li; Wenge Zheng; Hongbing Chen; Li Zhang; Zongbao Wang
Source:
RSC advances 2017 v.7 no.29 pp. 17640-17649
ISSN:
2046-2069
Subject:
X-ray diffraction; carbon nanotubes; crystal structure; crystallization; crystals; differential scanning calorimetry; graphene; graphene oxide; melting point; models; nanocomposites; polyethylene; polyolefin; temperature; transmission electron microscopy
Abstract:
... Precisely substituted polyethylenes have well-defined primary structures and aggregation architecture. Herein, precisely bromine-substituted polyethylene (PE21Br) was chosen as an ideal model to investigate the substituent impact on epitaxial crystallization upon one-dimensional carbon nanotubes (CNT) and two-dimensional reduced graphene oxide (RGO) via solution crystallization. The abilities of d ...
DOI:
10.1039/c7ra00958e

5. Influences of melt-draw ratio and annealing on the crystalline structure and orientation of poly(4-methyl-1-pentene) casting films

Author:
Ai-ping Ma; Li-yang Xu; Bo Yin; Ming-bo Yang; Bang-hu Xie
Source:
RSC advances 2016 v.6 no.67 pp. 62038-62044
ISSN:
2046-2069
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; annealing; crystal structure; crystals; differential scanning calorimetry; melting; scanning electron microscopy; temperature
Abstract:
... Poly(4-methyl-1-pentene) casting films with row-nucleated lamellar structure were extruded through a slit die followed by stretching using a chill roll. The influences of melt draw ratio, annealing temperature, annealing time and supplied strain level on the crystalline morphology and orientation of the poly(4-methyl-1-pentene) casting films were carefully investigated by means of scanning electro ...
DOI:
10.1039/c6ra08156h

6. Mechanochemical fabrication and properties of CL-20/RDX nano co/mixed crystals

Author:
Xiaolan Song; Yi Wang; Shanshan Zhao; Fengsheng Li
Source:
RSC advances 2018 v.8 no.59 pp. 34126-34135
ISSN:
2046-2069
Subject:
Raman spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; activation energy; carbon dioxide; chemical structure; crystals; differential scanning calorimetry; friction; infrared spectroscopy; mechanochemistry; milling; nitrogen dioxide; nitrous oxide; normal distribution; particle size; probability; raw materials; scanning electron microscopy; thermal degradation; transmission electron microscopy
Abstract:
... By milling 2,4,6,8,10,12-hexanitro-2,4,6,8,10,12-hexaazaisowurtzitane (CL-20) and hexahydro-1,3,5-trinitro-1,3,5-triazine (RDX) together, a nano CL-20/RDX co/mixed crystal explosive with a mean particle size of 141.6 nm is prepared from the raw materials, and the co/mixed crystals are characterized using scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction ...
DOI:
10.1039/c8ra04122a

7. Metal–organic framework in an l-arginine copper(ii) ion polymer: structure, properties, theoretical studies and microbiological activity

Author:
Agnieszka Wojciechowska; Anna Gągor; Wiktor Zierkiewicz; Anna Jarząb; Agnieszka Dylong; Marek Duczmal
Source:
RSC advances 2015 v.5 no.46 pp. 36295-36306
ISSN:
2046-2069
Subject:
Bacillus subtilis; Candida albicans; Enterococcus hirae; Escherichia coli; Fourier transform infrared spectroscopy; Gram-negative bacteria; Pseudomonas aeruginosa; Raman spectroscopy; Saccharomyces cerevisiae; Salmonella enterica; Shigella flexneri; Staphylococcus aureus; Streptococcus mutans; X-ray diffraction; antimicrobial properties; arginine; coordination polymers; copper; crystal structure; crystallization; crystals; differential scanning calorimetry; electron paramagnetic resonance spectroscopy; fungi; geometry; growth retardation; ligands; magnetism; models; nitrogen; oxygen; thermogravimetry; zwitterions
Abstract:
... A novel 1D polymeric copper(ii) complex with l-arginine and a linear bridged 4,4′-bipyridine with a formula of {[Cu(l-Arg)₂(μ-4,4′-bpy)]Cl₂·3H₂O}∞ (1) (where l-Arg = l-arginine, 4,4′-bpy = 4,4′-bipyridine) was synthesized. The crystal structure and properties of the product were characterized using X-ray diffraction, thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), spectr ...
DOI:
10.1039/c5ra02790j

8. Modulating molecular structures and dielectric transitions in organic–inorganic hybrid crystals

Author:
Xiao-Fen Sun; Zhongxia Wang; Wei-Qiang Liao; Peng-Fei Li; Jixing Gao; Yi-Yang Huang; Hai-Peng Chen; Heng-Yun Ye; Yi Zhang
Source:
RSC advances 2017 v.7 no.82 pp. 52024-52029
ISSN:
2046-2069
Subject:
X-ray diffraction; cations; chemical structure; crystals; differential scanning calorimetry; phase transition; temperature
Abstract:
... In this paper, three new hybrid phase transition compounds, [Hmpy]CdBr₃ (1, Hmpy = N-methylpyrrolidinuium cation), [Hmpy]₂CdBr₄ (2) and [Hmpy]₃CdBr₃·CdBr₄ (3), were synthetized by means of regulating the ratio of reactants. Systematic characterizations consisting of variable temperature X-ray single crystal diffraction, differential scanning calorimetry (DSC) and dielectric measurements reveal tha ...
DOI:
10.1039/c7ra10616e

9. New phase behavior of n-undecane–tridecane mixtures confined in porous materials with pore sizes in a wide mesoscopic range

Author:
Xiao Yan; Chunfeng Gao; Tongbo Wang; Liping Wang; Xiaozheng Lan
Source:
RSC advances 2013 v.3 no.39 pp. 18028-18035
ISSN:
2046-2069
Subject:
X-ray diffraction; alkanes; crystals; differential scanning calorimetry; equations; geometry; glass; melting; melting point; porosity; porous media; temperature
Abstract:
... Solid–liquid phase behaviors of normal alkane mixtures, undecane–tridecane (n-C₁₁H₂₄–C₁₃H₂₈, C₁₁–C₁₃), in bulk and adsorbed in SBA-15 and controlled porous glass (CPG) are investigated using differential scanning calorimetry (DSC) and temperature-dependent X-ray diffraction (XRD). The bulk C₁₁–C₁₃ mixtures display multiple phases due to the special rotator phase RI. In very small pores of SBA-15 ( ...
DOI:
10.1039/c3ra43124j

10. Nucleating effect of multi-walled carbon nanotubes and graphene on the crystallization kinetics and melting behavior of olefin block copolymers

Author:
Siduo Wu; Hui Li; Guangsu Huang; Jinrong Wu
Source:
RSC advances 2014 v.4 no.36 pp. 19024-19033
ISSN:
2046-2069
Subject:
X-ray diffraction; activation energy; carbon nanotubes; composite polymers; crystal structure; crystallization; crystals; differential scanning calorimetry; energy; graphene; heat; light microscopy; melting; mixing; nanocomposites; nanoparticles; olefin; temperature; thermal properties; wide-angle X-ray scattering
Abstract:
... Crystallization is of primary importance to the properties of olefin block copolymers (OBCs). In the present work, multi-walled carbon nanotubes (MWCNTs) and graphene are used as nucleating agents for the crystallization of OBC. Thus nanocomposites of OBC filled with MWCNTs and graphene were prepared by solution blending. Differential scanning calorimetry (DSC) tests were carried out to study the ...
DOI:
10.1039/c4ra01776e

11. One-dimensional facile growth of MAPbI₃ perovskite micro-rods

Author:
Arti Mishra; Zubair Ahmad; Farid Touati; R. A. Shakoor; Mohammad Khaja Nazeeruddin
Source:
RSC advances 2019 v.9 no.20 pp. 11589-11594
ISSN:
2046-2069
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; ambient temperature; crystals; differential scanning calorimetry; energy-dispersive X-ray analysis; scanning electron microscopy; solar cells; spectral analysis; thermogravimetry; transmission electron microscopy; weight loss
Abstract:
... One-dimensional microrods (4–5 mm) of PbI₂ and CH₃NH₃PbI₃ (MAPbI₃) with unique structural and morphological properties have been grown at room temperature. X-ray diffraction (XRD) patterns of both types of micro-rods exhibit a hexagonal system (P3̄m1(164) space group) with 2H polytype structures. In the case of PbI₂, the atomic composition of the microcrystals indicates the formation of pure phase ...
DOI:
10.1039/c9ra00200f

12. Sequential crystallization of high and low melting waxes to improve oil structuring in wax-based oleogels

Author:
Iris Tavernier; Chi Diem Doan; Davy Van de Walle; Sabine Danthine; Tom Rimaux; Koen Dewettinck
Source:
RSC advances 2017 v.7 no.20 pp. 12113-12125
ISSN:
2046-2069
Subject:
Helianthus annuus; X-ray diffraction; chemical composition; crystallization; crystals; differential scanning calorimetry; gelation; hardness; melting; polarized light microscopy; rheological properties; rice bran; rice bran oil; texture; waxes
Abstract:
... The main objective of this study was to investigate the effect of combining a high-melting wax (sunflower wax or rice bran wax) with a low-melting wax (berry wax or BEW) on the crystallization and gelation behavior of the corresponding wax-based oleogels in rice bran oil (RBO). Sunflower wax (SW) and rice bran wax (RBW) have a similar chemical composition but a very different crystallization behav ...
DOI:
10.1039/c6ra27650d

13. Simultaneous removal of NH₄⁺-N and refractory organics through sequential heterogeneous Fenton oxidation process and struvite precipitation: kinetic study

Author:
P. Maharaja; E. Gokul; N. Prabhakaran; K. Patchai murugan; S. Karthikeyan; R. Boopathy; S. Swarnalatha; G. Sekaran
Source:
RSC advances 2016 v.6 no.5 pp. 4250-4261
ISSN:
2046-2069
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; activated carbon; ambient temperature; ammonium nitrogen; crystallization; crystals; differential scanning calorimetry; differential thermal analysis; enthalpy; magnesium ammonium phosphate; magnesium oxide; nanopores; organic compounds; oxidation; pH; scanning electron microscopy; sodium phosphate; thermal stability; thermogravimetry; wastewater
Abstract:
... The aim of the present investigation was to treat wastewater containing a high concentration of NH₄⁺-N by heterogeneous Fenton oxidation of organics and struvite precipitation. The Fenton reagent (Fe²⁺/H₂O₂-10 mM/9.8 mM) and nanoporous activated carbon (30 g L⁻¹) as the heterogeneous matrix were used in heterogeneous Fenton oxidation (HFO) process for the destruction of refractory organic compound ...
DOI:
10.1039/c5ra20492e

14. Solution growth and thermal treatment of crystals lead to two new forms of 2-((2,6-dimethylphenyl)amino)benzoic acid

Author:
Rong Hu; Yunping Zhoujin; Meng Liu; Mingtao Zhang; Sean Parkin; Panpan Zhou; Jianzhi Wang; Faquan Yu; Sihui Long
Source:
RSC advances 2018 v.8 no.28 pp. 15459-15470
ISSN:
2046-2069
Subject:
Fourier transform infrared spectroscopy; Raman spectroscopy; X-ray diffraction; benzoic acid; chemical interactions; crystals; differential scanning calorimetry; drugs; energy; heat treatment; solvents
Abstract:
... We report the discovery of two new forms (II and III) of a potential non-steroidal anti-inflammatory and thyroid drug, 2-((2,6-dimethylphenyl)amino)benzoic acid (HDMPA) through solution growth and thermal treatment of crystals. Form II has been discovered through crystal growth in a variety of solvents, and characterized by single-crystal X-ray diffraction, powder X-ray diffraction (PXRD), FT-IR, ...
DOI:
10.1039/c7ra13353g

15. Surface crystallization of low thermal expansion Ba₀.₅Sr₀.₅Zn₂Si₂O₇ from an 8 BaO·8 SrO·34 ZnO·50 SiO₂ glass

Author:
Michael Kracker; Liliya Vladislavova; Christian Thieme; Tilman Zscheckel; Katrin Thieme; Thomas Höche; Christian Rüssel
Source:
RSC advances 2017 v.7 no.71 pp. 44834-44842
ISSN:
2046-2069
Subject:
X-ray diffraction; crystal structure; crystallization; crystals; cutting; differential scanning calorimetry; glass; heat treatment; light microscopy; scanning electron microscopy; silica; thermal expansion; zinc oxide
Abstract:
... Thermal treatment of a glass with the composition 8 BaO·8 SrO·34 ZnO·50 SiO₂ has led to the crystallization of a Ba₁₋ₓSrₓZn₂Si₂O₇ solid solution. This solid solution has a very low or even negative thermal expansion. The glass system possesses a strong tendency towards surface crystallization, while bulk nucleation is negligible. The surface crystallization behavior was characterized using differe ...
DOI:
10.1039/c7ra08587g

16. Synthesis, characterization and corrosion inhibition potential of two novel Schiff bases on mild steel in acidic medium

Author:
Archana Pandey; B. Singh; Chandrabhan Verma; Eno E. Ebenso
Source:
RSC advances 2017 v.7 no.74 pp. 47148-47163
ISSN:
2046-2069
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; corrosion; crystal structure; crystals; dielectric spectroscopy; differential scanning calorimetry; electrochemistry; electron transfer; hardness; hydrochloric acid; nitrophenols; nuclear magnetic resonance spectroscopy; schiff bases; spectral analysis; steel; thermography; ultraviolet-visible spectroscopy
Abstract:
... The present study deals with the synthesis of two novel Schiff bases (SBs) namely; 5-((4-chloro-3-nitrophenylimino)methyl)-2-methoxyphenol (SB-1) and 2-(4-hydroxy-3-methoxybenzylidineamino)-4-nitrophenol (SB-2) using a solid–liquid phase equilibrium diagram and their characterization via¹H and ¹³C NMR, FT-IR and UV-vis spectral analyses. Differential scanning calorimetric (DSC) thermographs were a ...
DOI:
10.1039/c7ra08887f

17. Temperature-induced reversible structural phase transition of 1,4-dimethyl-1,4-diazabicyclo[2.2.2]octane bis(perchlorate)

Author:
Li-Zhuang Chen; Xing-Xing Cao; Deng-Deng Huang; Qi-Jian Pan
Source:
RSC advances 2015 v.5 no.69 pp. 55914-55919
ISSN:
2046-2069
Subject:
X-ray diffraction; ambient temperature; anions; crystals; differential scanning calorimetry; hysteresis; perchlorates; phase transition
Abstract:
... 1,4-Dimethyl-1,4-diazabicyclo[2.2.2]octane bis(perchlorate), C₈H₁₈N₂²⁺·2ClO₄⁻, was synthesized and separated as colorless rodlike crystals. Differential scanning calorimetry (DSC) measurements revealed that this compound underwent a reversible phase transition at ca. 201.7 K with a hysteresis of 5.1 K width, which was also confirmed by dielectric measurements. Single crystal X-ray diffraction data ...
DOI:
10.1039/c5ra07526b

18. Tuning the solid-state fluorescence of chalcone crystals via molecular coplanarity and J-aggregate formation

Author:
Fangfang Yu; Mingliang Wang; Hao Sun; Yaqi Shan; Man Du; Arshad Khan; Rabia Usman; Wei Zhang; Hongbin Shan; Chunxiang Xu
Source:
RSC advances 2017 v.7 no.14 pp. 8491-8503
ISSN:
2046-2069
Subject:
X-ray diffraction; chalcone; chemical interactions; crystals; differential scanning calorimetry; evaporation; fluorescence; fluorescence emission spectroscopy; melting point; moieties; optical properties; solvents; thermogravimetry; ultraviolet-visible spectroscopy; wavelengths
Abstract:
... Four chalcones bearing the 1,3-diarylpropenone moiety 3-(9-anthryl)-1-(4-chloro)prop-2-en-1-one (I), 3-(1-pyrenyl)-1-(4-chlorophenyl)prop-2-en-1-one (II), 1-phenyl-3-(1-pyrenyl)prop-2-en-1-one (III) and 3-(1-pyrenyl)-1-(4-nitrophenyl)prop-2-en-1-one (IV) were synthesized and different crystal forms were obtained from different solvents by slow evaporation including I (Iₐ, Ib), II (IIₐ, IIb, IIc), ...
DOI:
10.1039/c6ra27458g

19. Uncovering the metastable γ-Ag₂WO₄ phase: a joint experimental and theoretical study

Author:
Roman Alvarez Roca; Pablo S. Lemos; Lourdes Gracia; Juan Andrés; Elson Longo
Source:
RSC advances 2017 v.7 no.10 pp. 5610-5620
ISSN:
2046-2069
Subject:
Raman spectroscopy; X-ray diffraction; crystals; density functional theory; differential scanning calorimetry; emissions; energy; geometry; photoluminescence; quantum mechanics; reflectance; scanning electron microscopy; theoretical models
Abstract:
... The synthesis of metastable solid phases is a pivotal starting point for innovative materials research. Here, we report the synthesis by means of a precipitation method of the metastable cubic γ-Ag₂WO₄ phase under ambient conditions. Different experimental techniques such as X-ray diffraction (XRD) with Rietveld refinement, field emission scanning electron microscopy (FE-SEM), micro-Raman/ultravio ...
DOI:
10.1039/c6ra24692c

20. The influence of epitaxial crystallization on the mechanical properties of a high density polyethylene/reduced graphene oxide nanocomposite injection bar

Author:
Guibin Yao; Tianchen Duan; Minfang An; Haojun Xu; Feng Tian; Zongbao Wang
Source:
RSC advances 2017 v.7 no.35 pp. 21918-21925
ISSN:
2046-2069
Subject:
X-ray diffraction; crystal structure; crystallization; crystals; differential scanning calorimetry; graphene oxide; injection molding; mechanical properties; nanocomposites; polyethylene; small-angle X-ray scattering; wide-angle X-ray scattering
Abstract:
... High density polyethylene (HDPE)/reduced graphene oxide (RGO) nanocomposite bars were prepared by injection molding and the effects of RGO on the HDPE matrix were investigated. Differential scanning calorimetry results demonstrated that RGO was an effective nucleation agent for HDPE. Two dimensional wide angle X-ray diffraction (2D WAXD) results showed that the incorporation of RGO enhanced the de ...
DOI:
10.1039/c7ra02742g

21. An investigation on single crystal growth, structural, thermal and optical properties of a series of organic D–π–A push–pull materials

Author:
Vinod Kumar Gupta; Ram Adhar Singh
Source:
RSC advances 2015 v.5 no.48 pp. 38591-38600
ISSN:
2046-2069
Subject:
X-ray diffraction; acetonitrile; activation energy; crystallization; crystals; differential scanning calorimetry; entropy; evaporation; heat; optical properties; solvents; thermal stability; thermogravimetry
Abstract:
... We present the large single crystal growth of a series of donor–π–acceptor (D–π–A) push–pull chromophores; 4-N,N-dimethylamino-β-nitrostyrene (1), 2-(4-(dimethylamino)benzylidene)malononitrile (2), ethyl 2-cyano-3-(4-(dimethylamino)phenyl)acrylate (3) and methyl 2-cyano-3-(4-(dimethylamino)phenyl)acrylate (4). Single crystals with good optical transparency were grown from a mixed organic solvent ( ...
DOI:
10.1039/c5ra04907e