中文摘要：

采用硅烷偶联剂γ-甲基丙烯酰氧丙基三甲氧基硅烷（MPS）对埃洛石纳米管（HNTs）进行表面改性,并以改性埃洛石纳米管（m-HNTs）填充硬质聚氯乙烯（PVC）制备聚氯乙烯/改性埃洛石纳米管（PVC/m-HNTs）纳米复合材料.傅里叶变换红外光谱分析、热重分析以及X射线光电子能谱分析证明埃洛石纳米管表面负载了硅烷偶联剂;扫描电镜结果表明,m-HNTs在PVC中分散均匀,PVC/m-HNTs纳米复合材料的断面呈现较大的塑性变形,表现出韧性断裂的特征;实验表明,m-HNTs对PVC同时起到了增韧和增强的作用,特别是使冲击强度大幅度提高,与添加未改性HNTs的材料相比,PVC/m-HNTs纳米复合材料具有更高的力学性能和模量;m-HNTs对复合材料热性能的提高和加工性能的改善也有一定的效果.

英文摘要：

Modified halloysite nanotubes（m-HNTs） were obtained by taking methacryloxypropyltrimethoxysilane（MPS） as the silane coupling agent,and were compounded with polyvinyl chloride（PVC） to prepare PVC/m-HNTs nanocomposites.Then,the properties of m-HNTs were characterized by means of FT-IR,TGA and XPS.It is found that the HNTs are successfully modified by MPS.SEM photographs show that m-HNTs uniformly disperse in PVC matrix,and that the fracture surfaces of the nanocomposites exhibit severe plastic shear deformation and ductile fracture.Moreover,experimental results indicate that（1） m-HNTs are effective in toughening and reinforcing PVC nanocomposites,especially in improving the impact strength;（2） PVC/m-HNTs nanocomposites are of better mechanical properties and higher modulus,as compared with PVC/HNTs nanocomposites;and（3） m-HNTs can also improve the thermal stability and rheological property of the nanocomposites.