有机硅蒙脱土复合改性水性聚氨酯的研究  

Studies of Waterborne Polyurethane Doubly Modified with Montmorillonite and Organosilicon

作　　者：侯孟华[1] 刘伟区[1] 黎艳[1] 陈精华[1] 

机构地区：[1]中国科学院广州化学研究所

出　　处：《功能高分子学报》2005年第1期89-93,共5页Journal of Functional Polymers

基　　金：广州市天河区科技局科技攻关项目(2002XGP28)

摘　　要：采用插层聚合制备了改性的水性聚氨酯乳液。X射线研究表明,蒙脱土以层间距 5.19 nm分散在水性聚氨酯基体中。硅烷和蒙脱土改性水性聚氨酯具有性能互补的效果, 当有机蒙脱土和有机硅烷的质量分数分别为0.01及0.02时,聚氨酯乳液涂膜的拉伸强度和断裂伸长率比未改性时分别提高了 70%、18%,吸水率降低了49%。A kind of waterborne polyurethane emulsion modified compositely was prepared by intercalative polymerization method. The results of X-ray diffraction study show that the average gallery distance of montmorillonite in the WPU matrix is 5.19nm. Organosilicon and montmorillonite have the effect of mutual improvement for modifying WPU. As w_(OMMT)=0.01and w_(OSC)=0.02 were introduced,compared with those of WPU without modification,the tensile strength and the elongation at break increased by 70% and 18% respectively,and the water absorption decreased by 49%.

关 键 词：有机硅 蒙脱土 水性聚氨酯 改性技术 插层聚合法 断裂伸长率 吸水率 涂料 

分 类 号：TQ633[化学工程—精细化工]