高等学校化学学报 ›› 1992, Vol. 13 ›› Issue (10): 1315.

• 论文 • 上一篇    下一篇

聚硅芳撑硅氧烷的研究(Ⅱ)——聚四甲基对硅苯撑硅氧烷的合成

林思聪, 刘晓宁, 王治流, 屠湘同   

  1. 南京大学化学系, 南京, 210008
  • 收稿日期:1991-08-13 修回日期:1992-07-07 出版日期:1992-10-24 发布日期:1992-10-24
  • 通讯作者: 林思聪

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

LIN Si-Cong, LIU Xiao-Ning, WANG Zhi-Liu, TU Xiang-Tong   

  1. Department of Chemistry, Nanjing University, Nanjing, 210008
  • Received:1991-08-13 Revised:1992-07-07 Online:1992-10-24 Published:1992-10-24

摘要: 本文以具有硅苯撑结构的环状有机硅氧烷——十二甲基环三对硅笨撑硅氧烷为单体,用开环聚合方法合成了聚四甲基对硅苯撑硅氧烷.选用硅醇钾催化,环单体有较高的开环聚合活性.通过IR、1H NMR和13C NMR等证明了聚合物的化学结构.聚合物在空气中的热失重温度较聚二甲基硅氧烷约高110℃,因此热稳定性更好.

关键词: 十二甲基环三对硅苯撑硅氧烷, 聚四甲基对硅苯撑硅氧烷, 改性有机硅氧烷, 开环聚合, 热稳定性

Abstract: Poly(tetramethyl-p-silphenylene siloxane) (PMSPS) with Mw 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 Mw 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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