新型双马来酰亚胺改性环氧树脂体系性能研究

用含二氮杂萘联苯结构的双马来酰亚胺(DHPZ-BM I)与4,4'-二氨基二苯砜(DDS)为复合固化剂固化环氧树脂(E-51)。采用示差扫描量热仪(DSC)研究了该体系的固化反应动力学,求得固化反应表观活化能Ea=63.28 kJ/mol,碰撞因子A=1.55×106s-1,反应级数n=0.89,该体系与链延长型双马来酰亚胺PPEK-BM I(DP=15)/DDS/E-51体系的固化反应动力学数据几乎相同,证明二者的固化反应过程相同。采用热失重分析仪(TGA)分析研究了上述2种固化体系的热分解动力学,前者的热分解活化能达215.04 kJ/mol,为后者的1.5倍以上,说明DHPZ-BM I/DDS/E-51是1种热稳定性能良好的耐高温环氧树脂体系。

Study on properties of epoxy resin system modified with BMI containing phthalazinone

The epoxy resin(E-51)was cured with self-made bismaleimde containing phthalazinone(DHPZ-BMI)/DDS compound.The curing reaction kinetics of DHPZ-BMI/ DDS/ E-51 was studied by DSC and the calculated results were as follows:apparent activation energy Ea=63.28kJ/mol,frequency factor A=1.55×106s-1 and the curing reaction order n=0.89.The results were almost as same as those of PPEK-BMI/DDS/E-51 system and showed that the two system had the same curing reaction process.The thermal decomposition kinetics of the cured systems of DHPZ-BMI/ DDS/ E-51 and PPEK-BMI/DDS/E-51 were investigated by thermal gravimetric analysis(TGA).The thermal decomposition energy of the former was 215.04 kJ/mol and 1.5 times than that of the later system.It showed that DHPZ-BMI/ DDS/ E-51 was a heat-resistant epoxy system with good thermal stabilities.