용해성 poly(dimethy-co-diphenylsilane)공중합체의 특성과 열분해에 관한 연구 = A study on the characteristics and pyrolysis of soluble poly(dimethyl-co-diphenylsilane)copolymer

다국어 초록 (Multilingual Abstract)

Soluble poly(dimethyl-co-diphenylsilane)copolymer,［(SiMe₂)x(SiPh₂)1-x］n where x=0.5 to 0.9., was synthesized by condensation polymerization of dimethyldichlorosilane and diphenyldichlorosilane in xylene. In the TG analysis of the copolymer, weight loss started at 170℃ and the weight residue at 1000℃ was 32%. The copolymer was stabilized by thermal oxidation at 80 to 110℃ for 5 hr. in air, and its thermal stability increased as the temperature increased. The copolymer heat treated above 700℃ showed no organic bonds of C-H and Si-CH₃. while Si-C, and Si-O large bonds were observed. Amorphous SiC was obtained by pyrolysis at 1000℃ and β-SiC at 1200 to 1400℃, in which a better crystallinity of β-SiC was observed at a higher temperature.