目的 为了提高纳米二氧化硅与树脂的相容性，采用“点击”化学法研究表面接枝聚合物。方法 利用普通自由基聚合制备的聚（甲基丙烯酸甲酯-马来酸酐）和聚（甲基丙烯酸甲酯-甲基丙烯酸缩水甘油酯），分别与丙炔醇和叠氮钠反应从而在分子链上引入多个炔基和叠氮基，然后与叠氮基改性的纳米二氧化硅粒子进行“点击”化学反应实现纳米二氧化硅包覆改性，并通过热重分析、红外光谱分析以及扫描电镜进行结构表征。结果 聚合物接枝到了纳米二氧化硅表面，包覆第一层聚合物后，二氧化硅分散性明显提高；包覆第二层聚合物后，分散性有所下降。结论 通过在纳米二氧化硅表面包覆聚合物，可以明显提高其分散性能。

The work aims to improve the compatibility between nano silica and resinand research the surface grafted polymer by virtue of "click" chemical process. Poly (methyl methacrylate-maleic anhydride) (P(MMA-MA)) and poly (methyl methacrylate-glycidyl methacrylate) (P(MMA-GMA)) were firstly synthesized by common free radical polymerization, then the two polymers reacted with propargyl and sodium azide respectively to introduce alkynyl and azide groups on a molecular chain. Later the two had click chemical reaction with azide group modified nano-silica particles to realize nano-silica coated modification, and the structure was characterized by thermogravimetric analysis (TG), infrared spectroscopy (FT-IR) analysis and scanning electron microscope (SEM). The polymer was grafted onto the surface of nano silica, dispersion of the silica nanoparticles improved significantly after coating the first layer of polymer and decreased after coating the second layer of polymer. The dispersion properties of the nano silica can be improved significantly by coating polymer on its surface.