化学学报 ›› 1982, Vol. 40 ›› Issue (4): 370-376. 上一篇    下一篇

研究简报

二甲基二氯硅烷与二甲基环硅氧烷反应的研究

朴爱植, 徐广智, 孙树门   

  1. 中国科学院化学研究所 北京
  • 投稿日期:1980-08-29 发布日期:2013-06-03
  • 通讯作者: 朴爱植

STUDY ON REACTION OF DICHLORODIMETHYLSILANE AND DIMETHYLCYCLOPOLYSILOXANE WITH 1H NMR

PIAO AI-ZHI, XU GUANG-ZHI, SUN SHU-MEN   

  1. Institute of Chemistry, Academia Sinica, Beijing
  • Received:1980-08-29 Published:2013-06-03

α,ω-二氯聚二甲基硅氧烷(1)是有机硅高分子制品的重要中间体,其n值的大小对有机硅高分子制品的性能有很重要的影响.

The 1H NMR speotra of mixtures of dichlorodimethylsilane,octamethyloyclotetrasilogane and α,ω-diohloropolydimethylsiloxane with various n values were measured and a quantitative relationship was derived.Our results indicated that 1H NMR method can be used to investigate the reaction between dichlorodimethylsilane and dimethyloyolopolysiloganes.The reaction between dichlorodimethylsilane and octamethyloyolotetrasiloxano with different Cl/Si ratios (R) and under different temperature has been studied.It has been found that n values can be controlled and the equilibrium constants at 220℃ and 200℃ for the interaction of two end groups giving middle group plus a diohlor odimethylsilane molecule arc 0.11 and 0.10 respectively.The mechanism of the above roaotion was proposed.