Studies on Polysilyl-Arylene Siloxane(Ⅱ)——Synthesis of Poly(tetramethyl-p-silphenyiene Siioxane)

Abstract

Abstract: Poly(tetramethyl-p-silphenylene siloxane) (PMSPS) with M_w of 6.6×10⁵ was synthesized by the ring-opening polymerization of dodecametliyl-cyeio-p-silphenylene trisiloxane (MSPTS) at 160℃ with potassium silanolate (0.01%)as the catalyst.The relationship between conversion of monomer or M_w of PMSPS and polymerization time indicates that under the mentioned polymerization condition,the MSPTSis active enough to polymerize and the ring-opening polymerization ss basically completed within half an hour.In addition,some properties of PMSPS,characterized by GPC,FTIR,¹H NMR,¹³C NMR and TGA are also reported.The TGAresult shows that PMSPS has a much higher thermal stability than that of polydimethylsiloxane mrtety.

Key words: Dodecamethyl-eyclo-p-silphenylene trisiloxane, Poly (tetramethyl-p-silphenyiene siloxane), Modified organic siloxane, Ring-opening polymerization, Thermal stability

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LIN Si-Cong, LIU Xiao-Ning, WANG Zhi-Liu, TU Xiang-Tong. Studies on Polysilyl-Arylene Siloxane(Ⅱ)——Synthesis of Poly(tetramethyl-p-silphenyiene Siioxane)[J]. Chem. J. Chinese Universities, 1992, 13(10): 1315.

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Studies on Polysilyl-Arylene Siloxane(Ⅱ)——Synthesis of Poly(tetramethyl-p-silphenyiene Siioxane)

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