POLYMERIZATION OF OCTAMETHYLCYCLOTETRASILOXANE WITH HEXAMETHYLDISILAZYL-LITHIUM AS INITIATOR  

作　　者：Zhijie Zhang Ning Zhou Cai-hong Xu Ze-min Xie 

机构地区：[1]Center for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, China Center for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, China Center for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, China Center for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, China

出　　处：《Chinese Journal of Polymer Science》2001年第1期7-11,共5页高分子科学（英文版）

基　　金：国家自然科学基金

摘　　要：This work focused on the anionic polymerization of octamethylcyclotetrasiloxane (D-4, D = Me2SiO2/2) initiated by a new kind of initiator hexamethydisilazyl-lithium (MMNLi). Si-29-NMR spectroscopy and gas chromatography (GC) were used to characterize the polymerization products. The process was accelerated by adding a small amount of high activity monomer D-3 and by raising the polymerization temperature. At the end of polymerization more than 95% of the monomer was converted to polymer and only a very small amount of D-4 and D-5 remained in the polymers.This work focused on the anionic polymerization of octamethylcyclotetrasiloxane (D-4, D = Me2SiO2/2) initiated by a new kind of initiator hexamethydisilazyl-lithium (MMNLi). Si-29-NMR spectroscopy and gas chromatography (GC) were used to characterize the polymerization products. The process was accelerated by adding a small amount of high activity monomer D-3 and by raising the polymerization temperature. At the end of polymerization more than 95% of the monomer was converted to polymer and only a very small amount of D-4 and D-5 remained in the polymers.

关 键 词：high purity polydimethylsiloxane OCTAMETHYLCYCLOTETRASILOXANE hexamethyldisilazyl-lithium anionic polymerization 

分 类 号：O63[理学—高分子化学]