Abstract: TiO₂/ Poly(styrene maleic anhydride) nanocomposites were synthesized In situ via multi-component solution method. It was found that the
composites existed in the formation of covalent bonding between TiO₂ and polymer by infrared spectra. The systematical morphology change of TiO₂ in the composites with different reaction conditions was observed through transmission electron microscope. Based on the mechanism of “anchor wrapping”, the nanocomposites were in the form of three-dimensional net with the separated nano-crystalline TiO₂ micro-phases inside, and the aggregation of TiO₂ grains was successfully inhibitted. The anatase phase of TiO₂ was proved by X-Ray diffraction.

Key words: covalent bonding, “anchor” wrapping, TiO₂ anatase phase