文献类型：期刊文献

英文题名：A novel cyano-functionalized allylic monomer for enhanced thermal and mechanical performance in bismaleimide resins and composites

作者：Chen, Hao[1];Zhang, Qiujin[1];Shi, Yang[2];Yang, Yanping[1];Yin, Zhaolong[1];Liu, Min[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]Shanghai Guanghua Cambridge Int Sch, Shanghai 201319, Peoples R China

年份：2025

卷号：333

外文期刊名：POLYMER

收录：;EI(收录号：20252218533508);WOS:【SCI-EXPANDED(收录号:WOS:001504616700003)】；

基金：The authors sincerely acknowledge the financial support from the National Natural Science Foundation of China (No. 52473075) and the Fundamental Research Funds for the Central Universities (No. JKD01251701) .

语种：英文

外文关键词：Bismaleimide; Cyano-functionalized allylic monomer; 4,4 '-diaminodiphenylmethane; Mechanical performance; 4,4 '-diaminodiphenylmethane; Thermal stability; Mechanical performance

摘要：The aerospace and electronics industries demand BMI resin-based composites with improved thermal and mechanical properties, with the resin matrix performance being critical. However, BMI resins are inherently brittle and poorly soluble, necessitating structural modification during synthesis. Conventional modification approaches typically fail to enhance mechanical properties while maintaining thermal stability simultaneously. We synthesized a cyano-functionalized diallyl bisphenol A monomer (DABPA-NPH) and copolymerized it with 4,4 '-bismaleimidodiphenylmethane (BDM) to produce a cyano-functionalized bismaleimide prepolymer (BDN). Subsequently, 4,4 '-diaminodiphenylmethane (DDM) was blended into BDN, resulting in the BDNDM system. DDM performs dual roles: catalyzing cyano group curing at lower temperatures and simultaneously toughening the BMI network. This modification strategy resulted in materials with enhanced mechanical strength, thermal stability, and processability. Specifically, BDNDM-3 (containing 3 wt % DDM relative to BDN) exhibited thermal stability (T-5 % = 429.9 degrees C, C-Y800 degrees C = 67.98 %), oxidation resistance (T-5 % = 430.7 degrees C, C-Y800 degrees C = 34.61 %), and a processing window exceeding 80 degrees C. The glass fiber-reinforced BDNDM-3 composite exhibited a flexural strength of 925.73 MPa, an interlaminar shear strength of 53.79 MPa, and a glass transition temperature (T-g) above 400 degrees C. After 12 h of thermal-oxidative aging at 400 degrees C, the composite retained >45 % of its flexural strength and >52 % of its interlaminar shear strength, confirming excellent oxidative stability. This work presents a structural engineering strategy that expands the application of BMI resins in aerospace composite systems.