Preparation and morphology of transparent poly(methyl methacrylate)-poly(dimethylsiloxane) hybrid materials using multifunctional silicone macromonomer

In this study, transparent poly(methylmethacrylate) (PMMA)-silicone hybrid materials, P(MMA-co-SigUMAx), were prepared with methylmethacrylate (MMA) and multifunctional silicone macromonomer introduced methacryl groups. The transmittance of hybrid materials improved with increase of methacryl groups of silicone macromonomer and reached around 90% T. Atomic force microscopic analysis, scanning electron microscope examinations, and copolymerization kinetics estimation by proton nuclear magnetic resonance revealed that the silicone macromonomer randomly incorporated in the copolymer with MMA by the increase of methacryl groups and suppresses the aggregation of the silicone segment. The hybrid materials introduced over 10 wt % of silicone component had water-shedding surface and the water contact angle was elevated from 65 to 95 degrees. Though the mechanical properties of hybrid materials were lowered by introduction of flexible silicone component, thermal property such as 5 wt % weight loss temperature were improved. (C) 2011 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem, 2012