文献类型：期刊文献

英文题名：Enhancing interfacial adhesion and mechanical properties in quartz fiber composites via sydnone-modified phthalonitrile resins

作者：Jiang, Fengguang[1];Yang, Yanping[1];Zhang, Hanyu[2];Zhang, Yongcheng[1];Xia, Hongwei[3];Zhang, Song[3];Liu, Min[1];Qian, Jun[1];Zhou, Quan[1]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Key Lab Specially Funct Polymer Mat & Related Tech, Minist Educ, Shanghai 200237, Peoples R China;[2]Albany Acad, Albany, NY 12208 USA;[3]Wuxi New Hongtai Elect Technol Co Ltd, Wuxi 214174, Peoples R China

年份：2026

卷号：284

外文期刊名：COMPOSITES SCIENCE AND TECHNOLOGY

收录：;EI(收录号：20262520971061);WOS:【SCI-EXPANDED(收录号:WOS:001806882100001)】；

基金：The authors gratefully appreciate the financial support from the National Natural Science Foundation of China (grant numbers 52473075, 52173074) and the Fundamental Research Funds for the Central Universities (grant numbers JKD01261701) .

语种：英文

外文关键词：Sydnone; Phthalonitrile resin; Interfacial adhesion

摘要：Phthalonitrile resin (PN) exhibits great potential in the field of high-performance composite materials. However, its practical application is often limited by its high curing temperature and poor interfacial adhesion. To address these challenges, a novel curing agent, Sydnone, was introduced. Through a solution-based prepolymerization strategy, a high-performance resin prepolymer was synthesized, effectively reducing the curing temperature of PN. Upon catalytic interaction with cyano groups, sydnone undergoes electronic redistribution, leading to the transformation of its carbonyl moiety into hydroxyl groups, which significantly enhance the polarity of the resin. These hydroxyl functionalities further react with quartz fibers to fabricate fiber-reinforced composites with outstanding mechanical properties, including a flexural strength of up to 917 MPa and an interlaminar shear strength of 92.2 MPa. XPS results confirmed the formation of covalent bonds between the hydroxyl groups in the resin and the surface silanol groups on the fibers, substantially improving interfacial adhesion. SEM analysis of the fracture surface revealed a predominant tough fracture mode, supporting the enhanced interfacial strength.