Abstract
Poly(dimethylsilylene-diphenylsilylene) copolymer, [(SiMe2 x(SiPh2)]n, where x=1.0 to 8.0, was synthesized by condensation polymerization of dimethyldichlorosilane and diphenyldichlorosilane in xylene. In the thermogravimetric analysis of the copolymer, weight loss started at 170‡C and the weight residue at 1,000‡C was 32%. The copolymer was stabilized by thermal oxidation at 80 to 110‡C for 5 hr in air, and its thermal stability increased as the temperature increased. The copolymer heat treated above 700‡C showed no organic bonds of C-H and Si-CH3, while Si-C and Si-0 bonds were observed. Amorphous SiC was obtained by pyrolysis at 1,000‡C and β-SiC at 1,200 to 1,400‡C, in which better crystallinity of β-SiC was observed at a higher temperature.
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Kang, PH., Yang, HS. Synthesis and characterization of poly(dimethylsilylene-diphenylsilylene) as a precursor to silicon carbide. Korean J. Chem. Eng. 15, 585–589 (1998). https://doi.org/10.1007/BF02698982
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DOI: https://doi.org/10.1007/BF02698982