Studies on properties of nano-SiO_2/silicone modified polyacrylate composite

Nano-SiO2/silicone modified polyacrylate emulsifier-free emulsion was synthesized by emulsifier-free emulsion polymerization and sol-gel technique.The effect of the content of nano-SiO2 on emulsion stability,solvent resistance and optical properties of film was investigated.The microstructure of the emulsion and film was studied by TEM and SEM.The results indicated that the emulsifier-free emulsion had better polymerization stability,and centrifugal stability of emulsion decreased with the increasing content of nano-SiO2.The water resistance of nano-SiO2/silicone modified polyacrylate hybrid film was better than that of silicone modified polyacrylate film,and increased with increasing content of nano-SiO2.The hybrid film had good light transmittance and ultraviolet light absorption property.In the hybrid film,silica domains smaller than 100nm were dispersed homogeneously in the polyacrylate component.