蒙脱土硅氧烷双重改性水性聚氨酯  

Waterborne Polyurethane Doubly Modified by Montmorillonite and Siloxane

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：《应用化学》2005年第10期1132-1136,共5页Chinese Journal of Applied Chemistry

基　　金：广州市天河区科技局科技攻关项目(2002XGP28)

摘　　要：以蒙脱土、甲苯二异氰酸酯、二羟甲基丙酸、γ-氨丙基三乙氧基硅烷、聚氧化丙烯二醇等为基本原料,采用插层聚合方法制备了复合改性的水性聚氨酯乳液。X射线衍射和TEM表明,蒙脱土以平均间距5.19 nm无规分散在水性聚氨酯基体中。硅烷偶联剂和蒙脱土改性水性聚氨酯具有性能互补的效果,加入质量分数为1%的蒙脱土和2%的偶联剂时,水性聚氨酯乳液膜的拉伸强度和断裂伸长率比相应的纯水性聚氨酯分别提高了69.7%和17.6%,吸水率降低了48.7%。A series of waterborne polyurethane（WPU） emulsions with montmorillonite（ MMT）, toluene diisocyanate, dimethylolpropionic acid, T-aminopropyhriethoxysilane and polyoxypropylene glycol etc. as the starting materials were prepared via the intercalative polymerization method. The X-ray diffraction and SEM results showed that the gallery distance of the montmorillonite was about 5.19 nm in the WPU matrix. Silane coupling agent and montmorillonite had mutual improvement effect for modifying the WPU. As 1% （mass fraction） MMT and 2% （mass fraction） coupling agent were introduced, compared with those of WPU without modification, the tensile strength and the elongation at break increased by 69.7% and 17.6% , respectively, and the water absorption rate decreased by 48.7%.

关 键 词：水性聚氨酯 蒙脱土 硅烷偶联剂 乳液 

分 类 号：O631[理学—高分子化学] TQ323.8[理学—化学]