改性CRL接触胶的制备及其对多孔材料的粘接机制

Preparation of modified CRL contact adhesive and its bonding mechanism on porous material

以CRL-g-MMA[甲基丙烯酸甲酯(MMA)接枝改性氯丁胶乳(CRL)]、苯丙乳液(SAE)为基料,配合适当助剂,制得多孔材料粘接用二元改性CRL接触胶。考察了SAE含量对该接触胶粘接性能的影响,并分析了该接触胶对多孔材料的界面粘接机制。结果表明:当w(SAE)=50%(相对于接触胶总质量而言)时,该接触胶的剥离强度相对最大(5.5 N/mm);将该接触胶应用于多孔材料(棉帆布/棉帆布)的粘接复合时,表现出明显的"锁-匙"效应,有利于形成牢固的机械胶合,这也是其粘接性能良好的原因之一。

With CRL-g-MMA[chloroprene rubber latex（CRL） grafted and modified by methyl methacrylate（MMA）] and styrene-acrylate emulsion（SAE） as basic materials,a eontact adhesive with binary-modified CRL for bonding porous material was prepared by adding appropriate additives. The influences of SAE contents on the bonding properties of contact adhesive were investigated,and the bonding mechanism of contact interface between eontaet adhesive and porous material was analyzed. The results showed that the contact adhesive had the relatively maximum peeling strength （5.5 N/mm） when mass fraction of SAE was 50% in total contact adhesive. This was also one of reasons,which had good bonding properties because it had obvious ＂lock and key＂ effect and could form firm mechanical adhesion when the contact adhesive was used for bonding porous materials（canvas/canvas）.