Article
Polymer Science
Haolan Gou, Bowen Zhang, Wei Wei, Xiaoma Fei, Xiaojie Li, Xiaoya Liu
Summary: Organic-inorganic hybrid microcapsules with triphenylphosphine (TPP) encapsulation were developed as a thermal latent curing accelerator for epoxy systems, demonstrating enhanced storage stability and curing activity, as well as increased glass transition temperature and thermal stability of the resin matrix.
POLYMER INTERNATIONAL
(2021)
Article
Polymer Science
Ting Wang, Cheng-yu Shi, Abdul Qadeer Dayo, Zhi-yi Guo, Jun Wang, Yanhui Wang, Athar Ali Khan Gorar, Jian Qiu, Wen-bin Liu
Summary: A novel series of self-catalytic phthalonitrile monomers with aliphatic segments were synthesized and showed excellent processing properties, thermal stabilities, and high glass-transition temperatures. The modified monomers with multi-functional benzoxazine monomers further improved the thermal stability and reaction activities of the polymers. The systems exhibited stable and excellent thermal stability.
EUROPEAN POLYMER JOURNAL
(2021)
Article
Thermodynamics
Dharmesh B. Sankhavara, Jalpa V. Chopda, Jignesh P. Patel, Parsotam H. Parsania
Summary: The chalcone moiety epoxy resin EBHBC was cured using different hardeners, resulting in different gel and sol fractions in sol-gel analysis. The cured resins showed variations in thermal stability, residues, and degradation kinetics depending on the aromatic diamines and anhydrides used in the curing process.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
Article
Polymer Science
Riccucci Giacomo, Romano Angelo, Pezzana Lorenzo, Tori Alice, Spriano Silvia, Sangermano Marco
Summary: In this study, PDMS composites were prepared by thermally curing nickel particles and nickel-coated carbon nanotubes as fillers. The fillers were oriented to enhance the thermal conductivity of the silicone polymer network. SEM results confirmed the effective alignment of nickel particles. Rheology and ATR-FTIR studies showed that the fillers and their orientation did not affect the curing kinetics of the silicone network. DMTA and tensile analysis revealed different thermo-mechanical behaviors due to the presence of different fillers and their orientation. Hot disk analysis demonstrated that magnetic filler orientation led to a nearly 200% increase in the thermal transmittance coefficient.
MACROMOLECULAR CHEMISTRY AND PHYSICS
(2022)
Article
Materials Science, Composites
Mengying Li, Jun Xiao, Xingbang Wang, Xiao Yang, Xiaodong Chen
Summary: A high-performance compound epoxy resin system suitable for wet filament winding was designed with improved properties. Through comparing the curing behavior of thermal and microwave curing composites, it was found that microwave curing exhibited higher curing degree and reaction rate in the early and middle stages. However, in the later stages of curing, the difference between the two methods was minimal.
POLYMER COMPOSITES
(2021)
Article
Materials Science, Multidisciplinary
Rossella Arrigo, Mattia Bartoli, Daniele Torsello, Gianluca Ghigo, Giulio Malucelli
Summary: This work explores multi-functional coatings based on UV-LED curable epoxy-acrylate resin and different loadings of carbonaceous structures with a unique morphology, characterized through thermal, dynamic-mechanical, and electrical analyses. The results show that the inclusion of PuP structures at varying concentrations enhances the storage modulus, thermal conductivity, and electrical conductivity of the composite films, indicating the effectiveness of surface modifying biochar particles for superior composite coating properties.
MATERIALS TODAY COMMUNICATIONS
(2021)
Article
Chemistry, Analytical
Fangjuan Zheng, Kun Wan, Farong Huang, Bo Niu, Youan Shi, Dong Wei, Yayun Zhang, Donghui Long
Summary: This study investigates the pyrolysis process of silicon-containing arylacetylene resin (PSA) using experiments and simulations. The results show that PSA has excellent heat resistance and thermal stability. The activation energy obtained from experiments and simulations confirms the thermochemical stability of cured PSA. Additionally, decreasing the number of side phenyl groups in PSA improves its thermal stability.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2022)
Article
Polymer Science
Ben Hu, Jun Wang, Xi Chen, Jingsheng Wang, Shuang Yang, Lu Zhu, Lanian Zou, Siqi Huo
Summary: This study reported a flame-retardant, single-component epoxy resin with satisfactory comprehensive properties, which exhibited great potential for versatile industrial applications.
POLYMERS FOR ADVANCED TECHNOLOGIES
(2023)
Article
Materials Science, Composites
Bo Li, Xiaoqian Xu, Dengxun Ren, Zexu Fan, Mingzhen Xu
Summary: In this study, a BA-ph/BPA-PEN composite film was prepared by modifying BA-ph resin with BPA-PEN. The introduction of BPA-PEN facilitated the polymerization reaction of BA-ph resin and directly affected the polymerization reaction of the benzoxazine ring and the cross-linking reaction of the nitrile group. The increase in BPA-PEN content led to the appearance of a phase reversion structure, promoting the improvement of mechanical properties. The system exhibited good thermal performance, with a higher Td5 and char yield compared to the pure BA-ph system.
COMPOSITES COMMUNICATIONS
(2023)
Article
Polymer Science
Hamid Reza Khalafi, Morteza Ehsani, Hossein Ali Khonakdar
Summary: The study found that cystamine as a curing agent for epoxy resin was well described by the Sestak-Berggren autocatalytic equation, with activation energies of about 56.2 and 53.6 kJ mol(-1), and a slightly lower glass transition temperature compared to other systems. Thermal degradation of the cured epoxy/cystamine network occurs above 283 degrees Celsius.
POLYMERS FOR ADVANCED TECHNOLOGIES
(2021)
Article
Polymer Science
Qingshan Yang, Jun Wang, Shuang Yang, Siqi Huo, Pingan Song, Zhengping Fang, Hao Wang
Summary: A phosphorus-containing aliphatic amine curing agent (DPT) was synthesized and used as a flame-retardant curing agent for epoxy resin systems. The introduction of phosphorus-based group reduced the curing activity. The DPT-containing EP systems exhibited improved flame retardancy and smoke suppression due to the bi-phase flame-retardant action of DPT.
JOURNAL OF POLYMER RESEARCH
(2023)
Article
Polymer Science
Qiufeng Mo, Yifeng Huang, Lanyu Ma, Wenqin Lai, Yihua Zheng, Yanming Li, Mengxue Xu, Zhimin Huang
Summary: Microwave curing technology can effectively accelerate the curing rate of UPR composite materials containing fillers, but excessive microwave power may lead to internal defects and reduced strength.
Article
Polymer Science
Timofey Kolesnikov, Alexandra M. Orlova, Anna Y. Tsegelskaya, Georgij Cherkaev, Alexander S. Kechekyan, Alexander Buzin, Petr Dmitryakov, Sergey Belousov, Igor G. Abramov, Olga Serushkina, Alexander A. Kuznetsov
Summary: The study synthesized an oligoimide containing both propargyl and phthalonitrile groups, which demonstrated the potential for cross-linking at temperatures between 300-350 degrees Celsius. With good solubility in solvents and low melt viscosity, this compound exhibited excellent thermal and mechanical properties.
EUROPEAN POLYMER JOURNAL
(2021)
Article
Chemistry, Analytical
Hongyu Dong, Huiming Liu, Arata Nishimura, Zhixiong Wu, Hengcheng Zhang, Yemao Han, Tao Wang, Yongguang Wang, Chuanjun Huang, Laifeng Li
Summary: This study presents a monitoring system for real-time strain response during the curing process of epoxy resin, showing the significant influence of curing process and temperature changes on strain behavior. The curing process affects the residual strain and mechanical properties of epoxy resin, while curing temperature has an impact on the impact strength of the resin.
Article
Materials Science, Characterization & Testing
N. Lorenz, M. Mueller-Pabel, J. Gerritzen, J. Muller, B. Groeger, D. Schneider, K. Fischer, M. Gude, Ch Hopmann
Summary: A fast crosslinking reaction is crucial for the economical production of automotive components in liquid composite molding processes. This study provides comprehensive results on the characterization of thermo-mechanical properties, pressure dependent reaction kinetics and shrinkage of fast curing epoxy resins, which give important advice for improved process modeling and facilitate prioritisation for future characterization of such resins.
Article
Polymer Science
Qing Ye, Qiaolong Yuan, Farong Huang
Summary: A novel propargyl ether-terminated oligo(imide siloxane)s (PTISs) were synthesized and used to prepare composites with excellent solubility and processing characteristics. The composites showed high thermal stability and mechanical properties, making them suitable for engineering applications in high-temperature environments.
HIGH PERFORMANCE POLYMERS
(2021)
Article
Polymer Science
Manping Ma, Changjun Gong, Chuan Li, Qiaolong Yuan, Farong Huang
Summary: The silicon-containing arylacetylene resins synthesized with 2,5-diphenyl-[1,3,4]-oxadiazole moieties exhibit good solubility, thermal and mechanical properties, as well as high flexural strength and modulus. The resins can be cured at temperatures below 200 degrees C and show high temperature resistance.
EUROPEAN POLYMER JOURNAL
(2021)
Article
Polymer Science
Gang Han, Jinsen Hou, Li Wan, Xufeng Hao, Xiaotian Liu, Shuaikang Lv, Man Gao, Junkun Tang, Farong Huang
Summary: The introduction of terminal acetylene compound can increase the reaction extent of inner acetylene groups in silicon-containing arylether arylacetylene resin, leading to improved flexural strength and heat resistance of the blended resin.
JOURNAL OF POLYMER RESEARCH
(2021)
Article
Polymer Science
Chuan Li, Gang Han, Manping Ma, Junkun Tang, Farong Huang
Summary: Poly(silylene arylacetylene) resins with good mechanical properties and excellent heat resistance were synthesized and their structures and properties were characterized. The study found that the substituents on the main chain of the resin had slight effects on its thermal properties but significantly affected its processing and mechanical properties. Among them, the resin with phenyl substituent showed the best processability and mechanical performance.
Article
Engineering, Chemical
Xiaotian Liu, Manping Ma, Chuan Li, Junkun Tang, Qiaolong Yuan, Farong Huang
Summary: Modifying the side groups on the silicon atom can control the properties of silicon-containing arylacetylene resins, such as processability, strength, and thermal stability. Resins with asymmetrical side groups exhibit better processability, while those with phenyl side groups show higher flexural strength.
POLYMER ENGINEERING AND SCIENCE
(2022)
Article
Chemistry, Applied
Shilong Dong, Xueying Hu, Qiaolong Yuan, Farong Huang
Summary: A series of telechelic silicon-containing hybrid polymers with reactive ethynylphenyl terminals were synthesized by the Grignard reagent method. The polymers were well characterized in terms of their structure, processability, curing behavior, thermal stability, dielectric properties, and mechanical properties. The results showed that the polymers had a wide processing window and stable viscosity, excellent thermooxidative stabilities, and good dielectric properties. The incorporation of Si-H groups markedly increased the thermal stability of the cured polymers.
REACTIVE & FUNCTIONAL POLYMERS
(2022)
Article
Engineering, Chemical
Chuan Li, Manping Ma, Junkun Tang, Qiaolong Yuan, Farong Huang
Summary: This study investigated the structure, thermal properties, and mechanical properties of a modified poly(silylene phenylether arylacetylene) resin with a cyano group. The results showed that the cyano group modification led to a lower curing temperature, improved heat resistance, and higher mechanical properties of the resin.
POLYMER ENGINEERING AND SCIENCE
(2022)
Article
Engineering, Chemical
Bangqiang Wu, Xufeng Hao, Jun Zhang, Liqiang Wan, Yan Zhou, Farong Huang
Summary: This study developed polytriazole resins with high toughness and investigated the effect of molecular weight and content of propargyl-terminated polypropylene glycols (P(t)PGs) on the mechanical properties of the resins. The results showed that PPTA resins with P(t)PG600 and 1.0% content of alkyne groups exhibited significantly improved impact strength and fracture toughness compared to PTA resin. The glass transition temperature and water absorption of the cured PPTA-600-1.0 resin were also determined.
POLYMER ENGINEERING AND SCIENCE
(2022)
Article
Polymer Science
Jixian Li, Shuaikang Lv, Changjun Gong, Yan Zhou, Farong Huang
Summary: In this study, three aromatic diynes with different linking positions on the benzene ring were used to prepare PSEA resins. The effects of linking positions on the properties of PSEA resins were investigated. The results showed that the linking position affected the crystallinity, processability, density, water uptake, mechanical properties, and heat resistance of the resins.
JOURNAL OF POLYMER SCIENCE
(2022)
Article
Polymer Science
Fangxu Cui, Zhiling Zhang, Qiaolong Yuan, Farong Huang, Zuozhen Liu
Summary: In this study, the dipropargyl ether of bisphenol A (DPEBA) was copolymerized with 1,3-diethynylbenzen (m-DEB) to obtain the silicon-containing poly(diethynylbenzene-co-dipropargyl ether of bisphenol A)s (PSAPEs) by Grignard reagents. The reactivity of DPEBA and m-DEB are similar, allowing for easy copolymerization to form a random copolymer. The incorporation of DPEBA in the copolymer matrix improves the meltability and strength of the composites, but decreases the thermal stability of the cured PSAPEs.
JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY
(2023)
Article
Thermodynamics
Xiaotian Liu, Shuaikang Lv, Junkun Tang, Donghui Long, Qiaolong Yuan, Farong Huang
Summary: Thermal decomposition of heat resistant poly(dimethylsilylene ethynylenemethylphenylenemethylenemethyl-phenyleneethynylene) (PSMA) resins was investigated using TGA, Py-GC-MS, and TGA-MS analysis techniques. The decomposition kinetics was studied using the Kissinger-Akahira-Sunose method (KAS method). The results showed that the decomposition of the cured PSMA resins was influenced by the presence and locations of side methyl groups on the benzene rings, leading to different decomposed fragments. The breakdown of the side methyl groups resulted in lower decomposition temperatures and further decomposition of the main chains of the resins, resulting in low residue yields. The decomposition mechanisms of the cured PSMA resins were suggested.
THERMOCHIMICA ACTA
(2023)
Article
Thermodynamics
Xiaotian Liu, Shuaikang Lv, Kejie Heng, Zhiyao Qiao, Junkun Tang, Qiaolong Yuan, Farong Huang
Summary: Poly(silylene arylacetylene) resins (PSA resins) exhibit good thermal stability under inert atmosphere but poor thermoxidative stability under aerobic environment. This article comparatively investigates the thermal and thermoxidative decomposition of cured poly(dimethylsiliylene ethynylenephenyleneethynylene)(PSA-M) resin, and analyzes the decomposed products and structure using pyrolysis-gas chromatography-mass spectrometry and Fourier transform infrared spectroscopy and mass spectrometry.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2023)
Article
Polymer Science
Jiawen Wang, Jixian Li, Jun Zhang, Shuyue Liu, Liqiang Wan, Zuozhen Liu, Farong Huang
Summary: Two reversible furan-maleimide resins with rigid -Ph-CH2-Ph- and flexible -(CH2)6- structures were synthesized and their structures were confirmed using Fourier transform infrared analysis. The thermal reversibility was demonstrated by differential scanning calorimetry analysis and sol-gel transformation process. The mechanical properties and recyclability of the resins were evaluated through flexural test.
Article
Polymer Science
Jixian Li, Changjun Gong, Shuaikang Lv, Junkun Tang, Qiaolong Yuan, Farong Huang
Summary: A series of poly(methylsilane arylether arylacetylene) (PSEA-H) resins were synthesized and their properties were investigated. The results showed that the introduction of Si-H groups reduced the curing temperatures and weakened the secondary relaxation of the resins. The cured resins exhibited excellent heat resistance and high mechanical properties when reinforced with T300 carbon fiber.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Polymer Science
Xiaotian Liu, Manping Ma, Jixian Li, Changjun Gong, Zhiyao Qiao, Farong Huang
Summary: A new kind of silicon-containing arylacetylene resins with a specific structure unit in the main chains were synthesized and characterized. The resin showed good mechanical properties and thermal stability.
POLYMER-PLASTICS TECHNOLOGY AND MATERIALS
(2022)