NEW POLY(CARBOSILANE) MODELS .4. DERIVATIZATION OF LINEAR POLY[(METHYCHLOROSILYLENE)METHYLENE] - APPLICATION TO THE SYNTHESIS OF FUNCTIONAL POLY(CARBOSILANES) POSSESSING A POLY[(METHYLSILYLENE)METHYLENE] BACKBONE

To study the mechanisms of pyrolysis of poly(carbosilanes), as well as the effect of the structure of these precursors upon properties of the resulting ceramics, novel organosilicon polymers with well-defined skeletons were prepared. Thus, linear poly(carbosilanes) formed of exactly alternate silicon atoms and methylene groups were synthesized. Owing to the presence of functional groups on silicon centers, cross-linking of these compounds was then investigated according to chemical routes, by creating disilane, disilazane, disiloxane, and hydrocarbon bridges between different poly(carbosilanic) sites. These polymers were characterized by physicochemical methods (IR, NMR, GPC, and TGA).