Article
Materials Science, Multidisciplinary
Ke Li, Xiaoyi Sun, Hua Yin, Kun Yang, Pei Dai, Ling Han, Longgui Zhang, Riwei Xu
Summary: This study successfully synthesized two kinds of phthalonitrile resins containing spirocycle acetal structures, and characterized their structures and properties using various methods. The results showed that these resins exhibited good thermal stability, thermomechanical properties, and processability.
ACS APPLIED POLYMER MATERIALS
(2023)
Article
Polymer Science
Wenjie Yang, Jiayue Qi, Wei Tan, Zhengzhu Zhu, Xian He, Ke Zeng, Jianghuai Hu, Gang Yang
Summary: A novel class of autocatalytic aromatic nitrile-based resins PNDCI was designed and synthesized, which showed improved curing reactivity and thermal properties. The cured products of PNDCIs exhibited outstanding thermal stability and thermomechanical properties.
Article
Polymer Science
Jia-Wei Li, Miao Chen, Jie-Mei Zhou, Cai-Yuan Pan, Wen-Jian Zhang, Chun-Yan Hong
Summary: The study focuses on the RAFT dispersion copolymerization of St and NMAS using PHEA as a macro-chain transfer agent in methanol, which promoted the morphology transition of nano-objects to form higher order morphologies such as worms and vesicles. Additionally, the introduction of NMAS units into the solvophobic blocks provided functional handles for post-PISA modification of the resultant nano-objects.
Article
Polymer Science
Dengxun Ren, Mingzhen Xu, Sijing Chen, Xiaoqian Xu, Shuai Zhang, Mangui Han, Xiaobo Liu
Summary: Introduction of fluorinated substituents in molecular chains is an efficient method to prepare materials with decreased dielectric constant and loss, as demonstrated in the synthesis of a kind of fluorinated phthalonitrile containing benzoxazine. The cured BPAF-ph showed double-stage curing reaction behaviors and good processability, with structures and properties being influenced by different post curing procedures. The glass fiber reinforced BPAF-ph composites exhibited promising properties in terms of thermal and mechanical stability.
EUROPEAN POLYMER JOURNAL
(2021)
Article
Polymer Science
Jingyuan Hu, Haoyang Feng, Yangke Rong, Shuaipeng Wang, Dandan Jin, Qing Chen, Jinyue Dai, Xiaoqing Liu
Summary: In this study, a recyclable itaconic acid-based epoxy thermoset material with high glass transition temperature and tensile strength was developed through thiol-olefin/thiol-epoxy click reaction and alkyl bond radical copolymerization to construct a hybrid cross-linked network. The material has excellent mechanical and thermal properties, recyclable processing, self-healing properties, high hardness, solvent resistance, and surface bond strength, making it suitable for coatings and adhesives.
POLYMERS FOR ADVANCED TECHNOLOGIES
(2023)
Article
Materials Science, Multidisciplinary
Jun Jiang, Changping Yin, Suli Xing, Nan Wu, Fahao Zhang, Jun Tang
Summary: In this study, a nonmetallic catalyst, 4-(4-aminophenoxy) phthalonitrile (PN-NH2), was used to reduce the curing temperature and time of cyanate ester (CE) resin. The addition of PN-NH2 significantly decreased the characteristic curing temperatures and activation energy of the CE resin. The cured resins with PN-NH2 showed superior mechanical and dielectric properties while maintaining reduced curing temperatures.
ACS APPLIED POLYMER MATERIALS
(2023)
Article
Polymer Science
Mithun Das, Sanjay Pal, Kinsuk Naskar
Summary: A high-performance elastomeric material based on carboxylated acrylonitrile-butadiene rubber (XNBR) was developed using a unique cross-linking route involving zwitterionic compounds as secondary cross-linking agents. The dual ionic network structure formed by zinc oxide (ZnO) and amino acids significantly improved the physical properties of the XNBR material. The results of this study demonstrate that the cross-linked XNBR rubber with ZnO and amino acids exhibits superior tensile strength compared to conventional cross-linking systems.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Chemistry, Applied
Guangwei Xu, Zhaopeng Liang, Qiaona Huang, Yinmao Wang, Juan Yang, Yijing Nie
Summary: A new polyurethane elastomer based on interpenetrating networks was prepared by mixing a polyurethane prepolymer with a polyurethane elastomer containing 2-ureido-4[1H]-pyrimidinone (UPy) groups. The interpenetrating polymer networks consisted of covalent cross-linking network, metal-ion coordination network, multiple hydrogen bond network, and flexible blocks. The experimental results showed that the presence of metal-ion coordination network, multiple hydrogen bond network, and flexible blocks improved healing efficiency, while the coexistence of covalent cross-linking network, metal-ion coordination network, and multiple hydrogen bond network improved mechanical properties.
PROGRESS IN ORGANIC COATINGS
(2023)
Article
Polymer Science
Jorge Ayarza, Zhao Wang, Jun Wang, Aaron P. Esser-Kahn
Summary: The article introduces a new method for forming organogels from polymers by piezo-electrochemical synthesis of disulfide bonds, which can be achieved through mechanical agitation. The research shows that this method can not only synthesize various organogels, but also enable the chemical recycling of polymers with a reducing agent.
Article
Polymer Science
Qinggeng Jiang, Yi Gao, Lusheng Liao, Rentong Yu, Jianhe Liao
Summary: In this paper, biodegradable epoxidized natural rubber containing cyclic carbonate groups (CNR) was synthesized. The material exhibited high self-healing efficiency due to the double dynamic covalent structure. Additionally, it was confirmed to be biodegradable according to biodegradable measurement. This is the first time that natural rubber with biodegradable and self-healing characteristics has been obtained.
Article
Chemistry, Analytical
Jia Liu, Qiao Duan, Zhentao Shao, Kaiming Chen, Yingdi Zhu, Juan Li, Weihong Tan
Summary: Aptamers, with their easy synthesis, strong modifiability, and high affinity, have been widely used for protein targeting in various fields. This article introduces an integrated technique called formaldehyde cross-linking with phase separation (FCPS) to facilitate the discovery and development of protein targeting aptamers, avoiding the use of beads and enabling rapid generation of aptamers.
ANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Applied
S. S. Nechausov, A. A. Aleksanova, O. S. Morozov, B. A. Bulgakov, A. Babkin, A. Kepman
Summary: Novel dual-functional phthalonitrile monomers containing a maleimide group were synthesized and characterized, showcasing a combination of bismaleimide resins' mechanical properties and phthalonitriles' thermo-oxidative stability. The copolymerization of maleimide groups via ene reaction and ring-opening amidation allowed the formation of a polymeric system with high impact strength, flexural strength, and excellent thermal properties.
REACTIVE & FUNCTIONAL POLYMERS
(2021)
Article
Chemistry, Multidisciplinary
Zhixuan Liang, Yiheng Li, Liu He, Zhi Gao, Zhenbin Tang, Yiting Xu, Birong Zeng, Weiang Luo, Guorong Chen, Conghui Yuan, Lizong Dai
Summary: A delayed cross-linking strategy is developed to make hydrogels evolvable. The study shows that mechanical stimulation can strengthen the hydrogels, and the hydrogels can self-evolve in a damage-healing process.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Polymer Science
Weihao Yin, Xiaoming Sang, Jinghui Dong, Zhen Chen, Xinggang Chen
Summary: A flexible siloxane structure was introduced into a biphenyl phthalonitrile monomer to improve its processability, resulting in the preparation of phthalonitrile alloy resins. The introduction of the biphenyl structure increased the initial decomposition temperature and improved the mechanical properties of the resin. This new strategy provides a solution for processing high melting point and narrow processing window phthalonitrile resins.
HIGH PERFORMANCE POLYMERS
(2023)
Article
Polymer Science
Huanxin Xie, Xian He, Yu Pu, Jiangbo Lv, Menghao Chen, Ke Zeng, Gang Yang
Summary: The meta- and para-catenated methylene-containing phthalonitrile oligomers with high methylene content were synthesized and exhibited low softening points and good thermal properties. The self-catalyzed curing reactivity of the oligomers was confirmed by thermal analysis and spectroscopy. The isothermal rheological results of model compound and PN oligomers suggested a revised curing mechanism.
HIGH PERFORMANCE POLYMERS
(2022)
