【摘要】 以混合芳胺为固化剂,通过聚氨酯(PU)对4,5-环氧环己烷-1,2-二甲酸二缩水甘油酯(TDE-85)与二酚基丙烷缩水甘油醚(E-51)环氧树脂的混合树脂体系的改性,制备了高性能聚氨酯改性环氧树脂(PU/EP)。通过差示扫描量热法(DSC),确定了PU/EP体系的最佳固化条件,并探讨了PU/EP体系的固化反应动力学特征。研究结果表明,PU/EP体系的最佳固化条件为:25℃12h+150℃2h。PU/EP体系的固化反应活化能为69.18kJ/mol,反应级数为0.901。更多还原

【Abstract】 With polyurethane modification of the blend of phenol-based epoxy propane(E-51) and diglycidyl-4,5-epoxycyclohexane-1,2-dicarboxylate(TDE-85),the high performance TDE-85/E-51 epoxy resin were prepared with the mixed aromatic amine of m-phenylenediamine(MPDA) and diaminodiphenylmethane(DDM) as curing agents.The curing technology of the TDE-85/E-51 epoxy resin modified by polyurethane was determined by differential scanning calorimeter(DSC) technique,and the kinetics of the curing processes were analyzed by Kissinger and Crane equations,based on the relationship of the curing kinetic parameters of the curing system.The results indicate that the optimal curing conditions of TDE-85/E-51 resin modified by polyurethane are 25 ℃12h+150 ℃2h.The activation energy of the curing reaction is 69.18 kJ/mol,and the order of reaction is 0.901.更多还原