用自制的γ-(2,3-环氧丙氧)丙基倍半硅氧烷为改性剂,对双酚A缩水甘油醚型环氧树脂E-51进行改性,两者配比为60/40(质量比),选用等当量的4,4'-二氨基二苯砜(DDS)为固化剂,形成环氧-倍半硅氧烷杂化材料.通过凝胶特性曲线、傅立叶变换红外光谱(FTIR)以及差示扫描量热方法(DSC)研究了该体系的固化反应特性及动力学问题;初步研究了固化体系的力学性能以及热性能.结果表明,该体系具有较好的工艺性,其固化反应的活化能是 48.7 kJ/mol,体系的热变形温度(HDT)达到200℃,热分解温度达到442℃,玻璃化转变温度(Tg)达到245℃,比相同条件下的E-51/DDS体系分别高出了31,58,20℃,体系在800℃时热残余量为25%,同时其弯曲强度和冲击强度基本保持不变.
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