Study on Syntheses and Characterizations of Polymethylphenethylsilane Polymethylcyclohexylsilane and their Copolymers

来源期刊：中南大学学报(英文版)2000年第2期

论文作者：HUANG Ke-long HU Hui-ping PAN Chun-yue CHEN De-ben

文章页码：92 - 96

Key words：polysilane; cosolvent; synthesis; characterization

Abstract: The effects of adding cosolvents of diglyme and 15-crown-5 to the reaction mixture of Wurtz-type coupling of dichlorosilanes on the yield and relative molecular mass dispersity of polymethylphenethylsilane(PMPES) were discussed. The results show that addition of 10% (volume ratio of diglyme to toluene) diglyme as a cosolvent to the reaction mixture leads to the yield increase of PMPES with a monomodal distribution of relative molecular masses. Adding 10% diglyme to the reaction mixtures, the yields of polymethylcyclohexylsilane(PMCS) and copolymers (polymethylphenethylsilane-co-methylcyclohexylsilane), (the molar ratios of methylphenethyldichlorosilane to methylcyclohexyldichlorosilane were 2.0, 1.0 and 0.5, and the copolymers were abbreviated by CopolymersⅠ,Ⅱ,Ⅲ, respectively) are 47%, 52%, 54%, 53%, respectively. Their relative molecular masses (^-M_w) almost reach 10⁵. These polysilanes were characterized by　¹H-NMR, IR and UV absorption spectrum.