The polydimethylsiloxane( PDMS) was first prepared by cationic emulsion polymerization,which was further used to form a silicone rubber-modified silica sol emulsion using tetraethoxysilane( TEOS) as coupling agent and silica sol as reinforcing agent.1H-NMR and GPC analysis of the synthesized PDMS show that the average molecular weight is around 27000 and polydispersity index is 1. 35. The microstructure of the silicone rubber emulsion was further characterized by TEM. The morphology of composite films was a...