KCS

Organosilanepolyols were obtained in 70-98 % isolated yields as white powders by the hydrolysis reaction of organopolyalkoxysilanes under weak acidic condition. These organoslanepolyols were applied as surface modifiers for inorganic oxide particles such as silica, Zinc oxide, and titania. This process relatively good modified route for hydrophobic inorganic oxide particles by two step reactions: 1) organosilanepolyol interact with hydroxyl group on inorganic oxide particles through strong hydrogen bonding to make thin layered coating on the surface of inorganic oxide particles, 2) then can undergo condensation by heating. When ca. 50 nm silica particles treated with 5 wt % organosilanepolyol, all silica particles were floated on water, indicating that such organosilanepolyols are good surface modifiers for silica particles. This way to modify surface of silica should be applied for preparation of organic-inorganic hybrid materials. When organosilanepolyol-treated silica particles were used for hybrid material (composites) with organic rubber such as styrene butadiene rubber (SBR), the composites exhibit increased bound rubber contents and improved mechanical properties. SEM images of the prepared composites clearly show that organosilanepolyol-modified silica particles are well hybridized with SBR. The results of dynamic mechanical analyzer show that composites prepared with organosilanepolyol-modified silica particles have lower tan δ values at 60 °C and higher tan δ values at 0 °C than a composite obtained by conventional composition process.