Fabrication of Polyurethane/Clay Nanocomposites by Prepolymer Lu Dehong, Su Gaoshen, Zhou Rong (Kunming University of Science and Technology, Kunming 650093) Abstract A polyurethane matrix nanocomposite has been successfully fabricated using a commercial grade polyurethane prepolymer and organoclay powders, with the aid of a solvent and supersonic treatment. The interplanar distance of (001) of the clay in the composite was 4.3nm according to XRD measurement. When the weight fraction of organoclay powders was 3%, the ultimate tensile strength of the nanocomposite reached 1.6 times, the fracture strain reached 2.2 times of that of the matrix, however the modulus was a little lower than that of the matrix according to the stress-strain curves. Key words Nanocomposite, Polyurethane, Clay 预聚法制备聚氨酯基粘土纳米复合材料 卢德宏 苏高申 周 荣 (昆明理工大学机电工程学院 昆明 650093) 摘要 本文利用商业级的聚氨酯预聚体和有机粘土成功制备了聚氨酯基粘土纳米复合材料。X 射线衍射表明，复合材料中粘土的(001)晶面面间距达到 4.3nm。当加入 3(wt)%的有机粘土时，纳米复合材料的拉伸强度达到聚氨酯基体的1.6倍，断裂伸长率达到聚氨酯基体的2.2倍，而刚度比聚氨酯基体有所下降。 关键词 聚氨酯 有机粘土 纳米复合材料 卢德宏 男，35 岁，副教授，从事各种复合材料和耐磨材料研究。 云南省自然科学基金资助项目(20010008Q) 2003-04-28 收稿，2004-02-10 接受 (PDF全文下载c04040)