【摘要】 纳米SiO₂粒子经硅烷偶联剂表面处理后,采用乳液聚合方法在纳米SiO₂粒子表面接枝苯乙烯单体,实现了纳米SiO₂表面的高分子包覆改性,制备了具有核壳结构的聚苯乙烯接枝SiO₂复合纳米粒子。采用傅里叶变换红外光谱、透射电子显微镜对纳米SiO₂粒子的表面结构及其在聚丙烯（PP）中的分散状况进行了表征。结果表明,接枝改性后纳米SiO₂粒子能够在PP基体中均匀分散,明显改善了PP复合材料的力学性能。更多还原

【Abstract】 Styrene monomers were grafted onto the surface of the nano-SiO₂ particles via emulsion polymerization after the particles underwent surface pretreatment with silane coupling agent KH-570,for reaching the polymeric coating modification of the particles.The nano-SiO₂ composite particles featuring shell-core structure were prepared in such a way.The surface structure and distribution status in PP matrix of the nano-SiO₂ particles were characterized by Fourier transform infrared spectrometry（FTIR）and transmission electron microscopy（TEM）.The results confirm that the modified nano-SiO₂ particles are homogeneously dispersed in the PP matrix and therefore,the mechanical properties of the PP composite material are remarkably improved.更多还原