咪唑羧酸盐固化环氧树脂的机理及动力学研究  

Study on the mechanism and kinetics of imidazole carboxylate curing epoxy resin

作　　者：宦佳琪 樊万鑫 孙昊 蔡计杰 孙莺[1] 胡和丰[1] HUAN Jia-qi;FAN Wan-xin;SUN Hao;CAI Ji-jie;SUN Ying;HU He-feng(School of Materials Science and Engineering,Shanghai University,Shanghai 200444,China;Shanghai Cedar Composites Technology Co.,Ltd.,Shanghai 201306,China)

机构地区：[1]上海大学材料科学与工程学院,上海200444 [2]上海晋飞碳纤维科技股份有限公司,上海201306

出　　处：《热固性树脂》2022年第3期6-12,共7页Thermosetting Resin

基　　金：上海市科学技术委员会资助项目(16DZ1121400)。

摘　　要：采用示差扫描量热法及傅里叶红外光谱研究了咪唑羧酸盐(EMI-AS)固化环氧树脂的反应机理和动力学。结果表明,咪唑羧酸盐是1种可有效固化环氧树脂的中温潜伏性固化剂,该体系首先发生羧酸离子与环氧的反应,反应释放出咪唑分子再进一步引发阴离子开环聚合,形成交联网络。该体系反应的表观活化能为64.9 kJ/mol,反应级数为0.904,且表观活化能随转化率的提高先升高后下降。The reaction mechanism and kinetics of imidazole carboxylate curing epoxy resin(EMI-AS)were studied by differential scanning calorimetry and Fourier transform infrared spectroscopy.The results showed that imidazole carboxylate was a medium-temperature latent curing agent that could effectively cure epoxy resins.In this system,the reaction between carboxylate ions and epoxy occured firstly,and imidazole molecules were released from the reaction,which further initiateed anionic ring-opening polymerization to form cross-linked network.The apparent activation energy of the reaction system was 64.9 kJ/mol and the reaction order was 0.904.The apparent activation energy was firstly increased and then decreased with the increase of the conversion rate.

关 键 词：咪唑羧酸盐 环氧树脂 潜伏性固化剂 固化动力学 

分 类 号：TQ323.5[化学工程—合成树脂塑料工业]