The properties and preparation of styrene acrylic emulision/nano-SiO_2 with core-shell structure

Styrene acrylic emulision(SAE) /SiO2 core-shell structure hybrid materials was prepared by emulsion polymerization with unsaturated(RNS-D) as a silica component and polyvinyl alcohol(PVA) as polymeric colloid stabilizer.Hybrids were characterized by TEM,FT-IR,the result indicated RNS-D which surface is modified by unsaturated organic compounds was used as a monomer taking part in the reaction completely.The morphology of hybrids latex coats was observed via scanning electron microscope(SEM).The best mechanical properties and water resistance were obtained,the tensile strength was up to 5.5N/mm2 at the same time the elongation at break reached 102%.The incorption of nano-SiO2 has a toughening and reinforcing effect.The water absorption reached lowest value was 12.5%.