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OALib Journal期刊
ISSN: 2333-9721
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一种双组份液态环氧树脂材料的固化行为
Keywords: 双组份液态环氧,玻璃化转变温度,等温固化
Abstract:
？将一种液态双酚a二缩水甘油醚环氧树脂用曼尼希改型胺进行等温固化,固化温度范围为5~60℃.采用差示扫描量热法(dsc)测试不同固化条件下固化后样品的玻璃化转变温度和剩余反应焓.结果表明,玻璃化转变温度g随固化时间的延长而上升,tg与转化率之间存在着不依赖于固化温度的一一对应关系.将tg与时间的关系曲线漂移叠合形成固化反应的总曲线,用时温漂移技术获得了体系唯一的表观活化能(52.65kj/mol).做出包含玻璃化曲线和iso-tg曲线的时间-温度-转变(ttt)等温固化图.
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