Abstract
A new class of hybrid organic-inorganic materials was synthesized and%characterized. These compounds were obtained through the hydrosilylation%reaction of a vinyl-containing polydimethylsiloxane with two kinds of Si-H%functional cyclic carbosiloxanes: 1) bis-[1,4-bis(methylhydrosiloxanyl)-dihydro-naphthalene],- (MHCDHNF); 2) 2,5-dimethyl-2,5-dihydro-3,3-diphenyl-1,4-di-oxa -2,5-disil-a-cyclopentane, (MHCDFMO). The different reactivities of the Si-H groups resulted in a two- stage crosslinking%process (in the presence of the hexachloroplatinic acid as catalyst) with onset of crosslinking occurring at 100°C and 150°C. The components of the final reaction mixture were analyzed by IR, 1H-NMR and gel-permeation chromatography (GPC) to establish their formal structure and infer a reaction pathway.
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