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- W2113140917 abstract "Abstract Homologs of ethynyldimethylsilanes [sbnd]C[tbnd]C[sbnd][[sbnd]Si(CH3)2[sbnd]C[dbnd]C[sbnd]] m with various unit lengths were synthesized by reacting di-Grignard ethyne with 1,4-dichlorodimethylsilane in tetrahydrofuran (THF). Poly(ethynyldimethylsilane-co-siloxane)s, [PESSs], [sbnd][[sbnd]C[tbnd]C[sbnd] Si(CH3)2[sbnd]} m+1[sbnd]O[sbnd]Si(CH3)2[sbnd]] x [sbnd] were synthesized by condensation polymerization of ethynyldimethylsilane and 1,3-dichlorotetramethyldisiloxane with high yields. They were identified by IR and NMR spectra and their molecular masses and molecular mass distributions measured by GPC. Thermal properties of the copolymers were determined by DSC and TGA; the glass transition temperatures go symbatically with the length of the ethynyldimethylsilane unit. In the case of m = 5 the polymer exhibits peculiar behavior: the usual strong melting peak is absent, but there is a transition which appears to be liquid crystalline. All polymers synthesized exhibit good thermal stabilities." @default.
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- W2113140917 date "1997-03-01" @default.
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- W2113140917 title "Synthesis and Thermal Properties of Poly(ethynyldimethylsilane-co-dimethylsiloxanes)" @default.
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- W2113140917 doi "https://doi.org/10.1080/00914039708039761" @default.
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