Article
Chemistry, Physical
Sergey S. Kharintsev, Sergei G. Kazarian
Summary: Thermally induced phase transitions using light at the nanoscale have significant applications in material science. Enhanced optical heating can be achieved with resonant nanostructures. The operating temperature range of a structured heatsink can be controlled to prevent excess heating.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Polymer Science
Lida Yu, Yang Yu, Jiahao Shi, Xiaorui Zhang, Feng Gao, Chenhao Li, Zhou Yang, Jingui Zhao
Summary: Bismaleimide (BMI) resin has great potential in aerospace, electronic, and machinery fields due to its extraordinary thermal stability. In this study, BMI resin modified by hyperbranched polyimide (HBPI) was obtained. The modified resin showed improved mechanical strength and enhanced dielectric properties.
Article
Polymer Science
Xinyi Wang, Yewon L. Jeong, Christopher Love, Holly A. Stretz, Gila E. Stein, Brian K. Long
Summary: This study explored the modification of the service window of unfunctionalized vinyl-addition polynorbornene (VAPNB) through the use of norbornene monomers bearing alkyl, aryl, and aryl ether substituents. The resulting VAPNBs exhibited high T'(g)s and large service windows, comparable to other commercial engineering thermoplastics. The feasibility of melt processing was demonstrated by successfully extruding and molding a functionalized VAPNB material, indicating potential for compatibility with traditional processing techniques and emerging technologies.
Article
Multidisciplinary Sciences
Yudong Cheng, Qun Yang, Jiangjing Wang, Theodoros Dimitriadis, Mathias Schumacher, Huiru Zhang, Maximilian J. Mueller, Narges Amini, Fan Yang, Alexander Schoekel, Julian Pries, Riccardo Mazzarello, Matthias Wuttig, Hai-Bin Yu, Shuai Wei
Summary: This study provides direct evidence showing a strong correlation between crystallization and beta-relaxations. It is found that by manipulating the beta-relaxation in Ge15Sb85, the crystallization kinetics can be tuned by an order of magnitude. In-situ synchrotron X-ray scattering, dielectric functions, and ab-initio calculations reveal the mechanism behind the weakened beta-relaxation intensity. This research offers a novel approach to controlling the crystallization of PCM.
NATURE COMMUNICATIONS
(2022)
Article
Polymer Science
Niklas Neumann, Sascha Thinius, Gideon Abels, Andreas Hartwig, Katharina Koschek, Laura Boskamp
Summary: A synthesis approach was investigated for crosslinkable hyperbranched prepolymers with adjustable degrees of methylation and methacrylation, achieving full conversion of hydroxyl groups. The substitution degrees of methacrylate could be adjusted by catalyzed esterification using predefined partially methylated polyglycerol-based precursors. The combination of methacrylic anhydride, triethylamine, and 4-dimethylaminopyridine was proven effective for complete conversion of primary and secondary hydroxyl groups. NMR, IR, and Raman spectroscopy confirmed the insertion of methacrylic crosslinking groups in the polymeric backbone. The photopolymerization of obtained prepolymers resulted in higher crosslink density, stiffness, and glass transition temperature with increasing methacrylate content.
Article
Materials Science, Ceramics
Carly Mathewson, Isabella Urbina, John V. Badding, Venkatraman Gopalan, John C. Mauro
Summary: Novel potassium-calcium-aluminosilicate glasses have been developed as cladding material for a doped ZnSe core infrared fiber laser, showing high glass transition temperatures and thermal expansion coefficients. Successful application of these glasses as cladding for a ZnSe tunable fiber laser has been demonstrated.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2021)
Article
Polymer Science
Julian T. Windbiel, Michael A. R. Meier
Summary: The Biginelli reaction was utilized to synthesize a set of 15 new fully renewable poly(3,4-dihydropyrimidin-2(1H)-one)s through a simple one-pot multicomponent approach, showing high glass transition temperatures and good thermal stability.
POLYMER INTERNATIONAL
(2021)
Article
Polymer Science
Na Teng, Jinyue Dai, Shuaipeng Wang, Xiaoling Liu, Jingyuan Hu, Xiaosu Yi, Xiaoqing Liu
Summary: A novel epoxy resin modifier, EHBFR, was designed and synthesized in this study, which effectively improved the fire safety and low-temperature impact strength of modified DGEBA without decreasing its T-g. The addition of EHBFR offers a promising strategy for constructing high-performance epoxy thermosets with excellent flame retardancy and enhanced properties.
EUROPEAN POLYMER JOURNAL
(2021)
Article
Chemistry, Multidisciplinary
Binqing Zhao, Chenxi Lou, Qi Zhou, Yating Zhu, Wei Li, Mu Jingshan
Summary: The chitosan/bis(2-hydroxyethyl)methyl tallow ammonium modified montmorillonite nanocomposites were synthesized via the phase inversion procedure with the assistance of carbon dioxide. The results showed that the incorporation of CO2 reduced the viscosity of the CS/formic acid solution, while the addition of TCN increased the viscosity. The presence of CO2 enhanced the interaction between TCN and carbamic acid, leading to improved mechanical properties of the nanocomposites.
Article
Materials Science, Multidisciplinary
Natalia Lindner, Zbigniew Sniadecki, Mieszko Kolodziej, Jean-Marc Greneche, Jozef Marcin, Ivan Skorvanek, Bogdan Idzikowski
Summary: A magnetocaloric effect with wide tunability was observed in melt-spun amorphous Gd65Fe15-xCo5+xAl10Si5 alloys of different Fe/Co ratios. The Curie temperatures of the samples were between 155 and 195 K and increased with decreasing Co content. The highest magnetic entropy change ΔS-M was obtained for Gd65Fe5Co15Al10Si5 when the magnetic field was increased from 0 to 5 T.
JOURNAL OF MATERIALS SCIENCE
(2022)
Article
Polymer Science
Daniel S. Honeycutt, William F. Charbonneau, Alexander J. North, Sara L. Cobb, Derek Lohmann, Massoud J. Miri
Summary: Polyesters with furan groups have attracted attention due to the renewability of furan containing monomers. In this study, 11 diols were evaluated in polymerizations with the dimethyl ester of 2,5-furandicarboxylic acid, and 8 of them were found to be novel. The results showed that the glass transition temperatures of these polyesters could be controlled over a wide range by selecting specifically substituted diols.
Article
Engineering, Environmental
Na Teng, Jinyue Dai, Shuaipeng Wang, Jingyuan Hu, Xiaoqing Liu
Summary: This study presents a successful approach to improve the flame retardancy, toughness, T-g, and strength of epoxy resins by incorporating a hyperbranched flame retardant. The modified epoxy resin shows excellent properties, indicating its potential for commercial applications.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Electrical & Electronic
T. A. Taha, Karam S. El-Nasser
Summary: This study prepared and analyzed the structure, thermal, and dielectric properties of PVDF/PVP/Co0.6Zn0.4Fe2O4 nanocomposite films. The results showed that thermal decomposition activation energy decreased with the increase in Co0.6Zn0.4Fe2O4 content, impacting the dielectric constants and conductivity values of the nanocomposites.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Thermodynamics
J. K. Bansiwal, Ajit Shankar Singh, T. U. Patro, D. S. Bag
Summary: Silicon-containing bis-phthalonitrile (SiPN) resin was synthesized via multi-step synthetic route and characterized using spectroscopic and thermal methods. The curing behavior of the resin was studied using DSC, which showed specific temperature ranges for melting, curing onset, curing exotherm peak, and curing end-set. The thermal stability of the cured resin was assessed using TGA, and the resin exhibited a char yield of 68% at 1073 K.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2023)
Article
Chemistry, Multidisciplinary
Wubin Wang, Yacheng Wang, Dongtang Zhang, Guangsheng Guo, Leyu Wang, Xiayan Wang
Summary: In this study, glass microfluidic chips with S-shaped mixing units were designed for controllable synthesis of Au@Pt core/shell nanomaterials by manipulating the hydrodynamics. The synthesized Au@Pt exhibited excellent catalytic activity, highlighting the importance of this approach.
Article
Chemistry, Multidisciplinary
Tuan Liu, Yongxing Nie, Liangdong Zhang, Ruoshi Chen, Yan Meng, Xiaoyu Li
Article
Chemistry, Physical
Tuan Liu, Yongxing Nie, Ruoshi Chen, Liangdong Zhang, Yan Meng, Xiaoyu Li
JOURNAL OF MATERIALS CHEMISTRY A
(2015)
Article
Chemistry, Multidisciplinary
Tuan Liu, Xuepei Miao, Xinxin Geng, An Xing, Liangdong Zhang, Yan Meng, Xiaoyu Li
NEW JOURNAL OF CHEMISTRY
(2016)
Article
Chemistry, Physical
Xuepei Miao, Tuan Liu, Chen Zhang, Xinxin Geng, Yan Meng, Xiaoyu Li
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2016)
Article
Chemistry, Multidisciplinary
Tuan Liu, Xiaolong Guo, Wangcheng Liu, Cheng Hao, Liwei Wang, William C. Hiscox, Chengyun Liu, Can Jin, Junna Xin, Jinwen Zhang
Article
Engineering, Chemical
Wangcheng Liu, Tao Liu, Tuan Liu, Tian Liu, Junna Xin, William C. Hiscox, Hang Liu, Linshu Liu, Jinwen Zhang
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2017)
Article
Engineering, Chemical
Tuan Liu, Liangdong Zhang, Ruoshi Chen, Liwei Wang, Bing Han, Yan Meng, Xiaoyu Li
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2017)
Article
Polymer Science
Tuan Liu, Meng Zhang, Xiaolong Guo, Chengyun Liu, Tian Liu, Junna Xin, Jinwen Zhang
POLYMER DEGRADATION AND STABILITY
(2017)
Article
Chemistry, Multidisciplinary
Tuan Liu, Yan Meng, Xiaochen Wang, Haiqiao Wang, Xiaoyu Li
Article
Chemistry, Multidisciplinary
Tuan Liu, Bing Han, Liangdong Zhang, Min Wu, An Xing, Xuepei Miao, Yan Meng, Xiaoyu Li