Synthesis of polycarbosilazanes by using the hydrosilylation reaction

The paper reports a simple method for the synthesis of a polycarbosilazane possessing both C-C and Si-N-Si linkages in its backbone by using the hydro silylation reaction of two disilazanes with Si-H and Si-Vinyl terminal grou ps, respectively. The obtained polymer was characterised by IR, GPC, TGA, e lemental analysis and solubility behaviour. The route also stands for a ver satile approach to novel organosilicon polymers possessing various substitu ents on silicon and nitrogen atoms and with various lengths of the hydrocar bonate bridges. The ultimate aim is to obtain precursors for C-Si-N ceramic s with better thermal stability than of those obtained from polycarbosilane precursors (SiC-based ceramic fibers).