环氧树脂是灌封胶的主要基础材料,然其高黏度、易脆、聚热等缺陷造成灌封结构开裂、缺料等质量问题,文中利用邻苯二甲酸二缩二乙二醇双丙烯酸酯(PDDA)与氨基的迈克尔点击反应,使其在环氧体系中发挥多种功能.结果表明,PDDA作为活性稀释剂可有效地降低体系的初始黏度;促进固化反应的进行,使体系的凝胶时间提前;抑制剧烈放热;提高韧性等多种协同效应.双酚A环氧树脂(E51)/三乙烯四胺(TETA)体系中,100份E51中加入40份PDDA时,基体断裂韧性增250.0%;E51/PA51体系中,同样的加入量韧性增加92.7%.同时均保持了良好的物理力学性能.
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