Polyacrylate / Tio <sub> 2 </ Sub> / Sio <sub> 2 </ Sub> Organic - Inorganic Hybrid Materials Research

Titanium dioxide sol and polyacrylate/ titanium dioxide hybrid materials were prepared by sol - gel method.In the nanoreactor of miniemulsion,polyacrylate / silicon dioxide hybrid materials emulsion was synthesized.The structure of hybrid materials was characterized by FT-IR,UV-Vis,GPC,AFM and DLS.(1) A series of sol-gel derived organic-inorganic hybrid materials consisting of organic poly(methyl methacrylate)(PMMA) and inorganic titania(TiO₂) were successfully synthesized by usingγ-(trimethoxysilyl)propyl methacrylate(MTMS) as a coupling agent.The influences of water,solvent,temperature,the addition of tetraethoxysilane(TEOS) on the TiO₂ Sol was studied.Effects of the different polymers and different weight radios of TiO₂/polymer on the hybrid materials were studied.It was found that the addition of TEOS can significantly affect on TiO₂ Sol and the content of the MTMS have effectively impact on hybrid material.(2) The transparent poly(methyl methacrylate-co-butyl acrylate-co-maleic anhydride)/titania[P(MMA-BA-MAn)/TiO₂]were successfully prepared with methyl methacrylate-butyl acrylate-maleic anhydride copolymer P(MMA-BA-MAn) and titanium(â…£) n-butoxide in the presence of theγ-aminopropyl triethoxysilane(APS) by sol-gel method.Atomic force microscopy(AFM) showed that the content of MAn was 2%,the morphology of hybrid materials were co-continual sphericity.When the contents of MAn was 5%and the weight radios of TiO₂/polymer was 4:1,it occurred spinodal decomposition and formed bicontinuous structure.(3) By minimulsion polymerization,poly(methyl methacrylate-co- butyl acrylate-costyrene) /silica[P(MMA-BA-St)/SiO₂]was prepared via the mixing of theγ-(trimethoxysilyl)propyl methacrylate(MTMS) capped acrylic resin with silica.The effects of surfactant,sodium dodecyl sulfate(SDS),co-stabilizer(hexadecane,HD), ultrasonic period and reaction temperature on the miniemulsion polymerization were studied.It can be summarize that the addition of inorganic phase can effectively improve breaking elongation and breaking stress of the hybrid materials.