摘要
采用间苯二甲胺和聚醚胺作为混合固化剂 ,研究了柔性链增韧和不同官能度环氧的“混合效应”的协同作用对环氧胶粘剂的低温 (- 196℃ )、室温和高温 (14 0℃ )粘接性能的影响。研究结果显示 ,以间苯二甲胺为固化剂时 ,AG 80的引入可以改善双酚A环氧的高温及低温 (- 196℃ )的粘接强度 ,并在质量分数为 5 0 %时使低温粘接性能达到最佳值。聚醚链段的引入有利于胶粘剂低温和室温粘接强度的改善 ,但高温性能降低。而在柔性链改性体系中AG 80的加入可改善高温粘接性能 ,但室温及低温剪切强度略有降低。
In this paper, the influence of flexible polyether chain and synergetic effect of mixed resins with different functionality on the adhesion properties of epoxy adhesives at -196 ℃, room temperature and 140 ℃ were studied. The results indicated that when the curing agent used was m-xylene diamine (m-XDA), the addition of AG-80 resin could improve high temperature and cryogenic lap shear strength of DGEBA. And the lap cryogenic shear strength reached optimal value when the content of AG-80 was 50%. The introduction of flexible polyether chain could effectively improve the room temperature and cryogenic adhesion properties of adhesives, but the bonding strength at high temperature reduced greatly. In the system modified by flexible chain, the addition of AG-80 resin could improve adhesion properties at high temperature, but it reduced room temperature and cryogenic lap shear strength slightly.
出处
《粘接》
CAS
2004年第4期20-23,共4页
Adhesion
