Reinforcing Effects from Silica-Type Fillers Containing Hydrocarbon Groups

摘要

Curing hydroxyl-terminated chains of poly(dimethylsiloxane) is achieved by reacting them with tetraethoxysilane, vinyltriethoxysilane, methyltriethoxysilane, and phenyltriethoxysilane, with excess amounts of the silanes hydrolyzed in-situ to filler particles. When triethoxysilanes are used, the vinyl, methyl, and phenyl groups must be part of the filler particles and, in at least some cases, the resulting reinforcement is better than that given by the silica particles obtained from the (unsubstituted) tetraethoxysilane.