( 4 ) we use sem to observe fractured morphology of composites , and tem to observe dispersion and particle size of nanoparticles or composited nanoparticles in matrix . we also investigate dispersion property of composited nanoparticles in polymer matrix with the help of microtone ( 4 )采用扫描电镜( sem )观察缺口冲击的断裂形貌，通过透射电镜( tem )观察纳米粒子和复合纳米粒子的分散情况和粒径的大小；通过超薄切片法研究复合粒子在聚合物基体中的分散性。
