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- W4256695269 abstract "1,2-Dimethyltetramethoxydisilane was reacted with acetylene in a tube reactor heated to 400—425°C. A mixture that is liquid at ambient temperature was formed. Careful vacuum distillation of this liquid mixture yielded crude 1,4-dimethyl-1,4-dimethoxy-1,4-disilacyclohexadiene. The crude product was reacted with potassium hydroxide, and recrystallization in isopropyl alcohol produced 1,4-dimethyl-1,4-disilacyclohexadiene-1,4-di(potassium silanoate). Upon acidification of the disilanoate, the thermally stable siloxane homopolymer was produced. Upon reaction of the disilanoate with phenylmethyldichlorosilane, the thermally stable, exactly alternating methylphenylsiloxane copolymer was obtained. Thermogravimetric analysis showed that these polymers are thermally stable. Vigorous distillation of the crude reaction mixture yielded a glassy transparent reaction product. IR and 1H NMR spectroscopic data suggest that the product is poly(methylmethoxysilane). The reaction of acetylene and 1,1,2,2-tetrachlorodisilane in a heated tube at 500°C produced a product that is liquid at ambient temperature and that produced a glassy transparent solid upon vigorous distillation. IR, 1H NMR, and UV spectroscopic data suggest that the product is poly(methylchlorosilane)." @default.
- W4256695269 created "2022-05-12" @default.
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- W4256695269 date "1989-05-05" @default.
- W4256695269 modified "2023-09-27" @default.
- W4256695269 title "Polymers and Copolymers of Disilacyclohexadiene" @default.
- W4256695269 doi "https://doi.org/10.1021/ba-1990-0224.ch019" @default.
- W4256695269 hasPublicationYear "1989" @default.
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