摘要
采用差示扫描量热法和极值法分别研究了环氧树脂E-51与固化剂甲基四氢邻苯二甲酸酐(MeTHPA)和甲基六氢邻苯二甲酸酐(MeHHPA)的固化动力学,并考察了反应体系的黏流活化能。结果表明:E-51/MeHHPA体系的黏流活化能为39.1 kJ/mol,低于E-51/MeTHPA体系,更有利于纤维浸渍;E-51/MeHHPA体系的凝胶温度与固化温度之差为20.9℃,低于E-51/MeTHPA体系,固化放热更集中;E-51/MeHHPA体系固化反应活化能为55.18 kJ/mol,低于E-51/MeTHPA体系,更适合于快速拉挤成型。
The curing kinetics of epoxy resin E-51/methyl tetrahydrophthalic anhydride（MeTHPA）curing agent system and epoxy resin E-51/methyl hexahydrophthalic anhydride（MeHHPA） curing agent system were studied by means of differential scanning calorimetry（DSC） and extremum method.And the viscous flow activation energy of the systems was investigated.The results show that E-51/MeHHPA system has viscous flow activation energy of 39.1 kJ/mol,lower than that of E-51/MeTHPA system,and consequently the former system is beneficial to fiber dipping.The difference between the gelation temperature and the curing temperature of E-51/MeHHPA system is 20.9 ℃,which is smaller than that of E-51/MeTHPA system,so the former system has intensive curing exothermic property.The curing reaction activation energy of E-51/MeHHPA system is 55.18kj/mol,lower than that of E-51/MeTHPA system,and therefore E-51/MeHHPA system is more suitable for the fast pultrusion.
出处
《合成树脂及塑料》
CAS
北大核心
2015年第4期63-65,共3页
China Synthetic Resin and Plastics
