研究了KH-560硅烷偶联剂的水解工艺,采用不对硅烷水解平衡体系带来干扰和破坏的电导率测定法,在线检测硅烷的水解程度.利用水解后的KH-560硅烷溶液对低碳钢试件表面进行预处理,制备了聚乙烯(PE)涂层,对比了不同表面预处理工艺制备的PE涂层的结合强度.结果表明:由硅烷进行试件表面处理所得涂层的结合强度比用传统的砂纸打磨、酸洗、磷化、喷沙处理法分别高出了40.3%、46%、17.6%和13.2%,而涂层的断裂形式也有别于传统的处理方法,为内聚断裂;且PE涂层结合强度随着KH-560硅烷溶液浓度的增大反而下降.对于PE涂层的硅烷化处理,适宜的KH-560的浓度为5%左右,其水解时间为48 h.
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