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采用DSC、FTIR研究了不同种类阳离子、阴离子以及不同浓度的咪唑盐离子液作为双酚A型苯并恶嗪固化反应的催化剂时体系的固化反应、固化物的交联结构。结果表明,咪唑盐离子液能够降低苯并恶嗪的固化反应温度,固化物中部分生成苯氧醚式结构。咪唑盐阳离子体积越大,因位阻效应固化反应越慢,而阴离子则通过与苯并恶嗪开环产生的中间体阳离子的相互作用改变体系的反应速率。
DSC, FTIR were used to study the curing reaction and the cross-linked structure of the cured products with different kinds of cations, anions and different concentrations of imidazolium ionic liquids as catalysts for bisphenol A benzoxazine curing reaction. The results show that imidazole salt ionic liquid can reduce the curing reaction temperature of benzoxazine, and the cured product partially forms phenoxy ether structure. The larger the imidazolium cation volume is, the slower the curing reaction is due to the steric hindrance and the anion alters the reaction rate of the system by the interaction with the intermediate cation created by benzoxazine ring-opening.