Novel Approach for Preparation of Organic/Inorganic Hybrid Nanocomposites

摘要

A new class of organic/inorganic hybrid nanocomposites has been synthesized through surface initiated emulsion grafting polymerization in the presence of modified silica particles. Well-defined polymer chains were grown from the nanoparticle surfaces to yield individual particles composed of a silica core and a densely grafted outer styrene-acrylonitrile copolymer (SAN) layer, The resulting nanocomposites demonstrated raising glass-transition temperature (Tg) and showed a good dispersion of silica nanoparticle regardless of particle content. It is because of the existence of the covalent bond between ABS chains and silica nanoparticles that increased the compatibility between the organic and inorganic phases The interfacial interaction between the silica and the SAN phases plays a major role in controlling the microstructures and the properties of the composite materials.