将端羧基液体丁腈橡胶(CTBN)与环氧树脂(EP)预聚,采用红外光谱、黏度计、万能电子材料试验机及扫描电镜(SEM)研究了CTBN含量对EP/聚酰胺/聚醚胺室温固化环氧结构胶的性能影响.结果表明,CTBN用量从0phr增加至20phr时,胶体拉伸强度从45MPa降低至29MPa,降低了35.56％;压缩强度从98MPa降低至60.2MPa,降低了38.6％;当CTBN加到10 phr时,极大地提升了粘接强度,钢-钢剪切强度从4.1MPa上升到16.7MPa,增加了3.07倍;结构胶加热至400℃时,EP质量损失达73.7％,而CTBN改性EP的质量损失为59.4％.SEM结果表明,CTBN在胶体固化过程中析出橡胶相,还有一定的空穴出现,橡胶粒子通过空化以及界面脱粘释放其弹性能,使材料的韧性得以提高.
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