邻苯二甲腈
材料科学
固化(化学)
复合材料
烧焦
热分析
热固性聚合物
傅里叶变换红外光谱
化学工程
热重分析
差示扫描量热法
热的
活化能
高分子化学
酞菁
化学
热解
有机化学
纳米技术
热力学
物理
工程类
作者
Yuanyuan Song,Lishuai Zong,Feng Bao,Guiyang Li,Zuoqiang Wu,Nan Li,Jinyan Wang,Fangyuan Hu
摘要
The effects of inorganic particles such as Al 2 O 3 and B 4 C on the solidification kinetics and heat resistance of phthalonitrile resin were investigated. The properties of the blends and the cured products were tested by rheometer, differential scanning calorimetry, Fourier transform infrared spectroscopy, and thermogravimetric analysis. The results revealed that B 4 C and Al 2 O 3 inorganic particles could prolong the gel time of phthalonitrile resin and broaden the processing window. The curing kinetic analysis showed that the presence of the particles could significantly reduce the curing activation energy of phthalonitrile resins by 72.38 kJ/mol down to 43.03 kJ/mol. Meanwhile, the heat resistance of the phthalonitrile resin was improved. Among them, the blend system combined with 30% B 4 C showed prominent thermoresistance. And while the T d5% weight loss temperature was 600°C, char yield at 1000°C was higher than 86% under nitrogen atmosphere; while the T d5% weight loss temperature was 581°C, char yield at 1000°C was higher than 80% under air atmosphere. Hence, the resulting resins were good candidate matrix of high‐temperature structural composites.
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