Multifunctional carbochain organosilicon polymers. I. A new approach to the synthesis of high molecular weight cyclolinear polycarbosiloxane
Tóm tắt
Controlled synthesis of high molecular weight cyclolinear polycarbosiloxanes (PCCS) is considered, using the following reactions sequence: (1) anionic polymerization of vinyldimethylphenylsilane, (2) replacement of the Ph group in polyvinyldimethylphenylsilane (M
n=83.900,M
w/M
n=1.48) by a Cl group to prepare polyvinyldimethylchlorosilane (PVMCS), and (3) hydrolytic intramolecular condensation of PVMCS. The formation of carbochain polymer with predominantly six-membered carbosiloxane rings is demonstrated (M
n=81.400,M
w/M
n=1.54).
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