STUDY ON SYNTHESIS AND END-BLOCKING OF POLYMETHYLSILANE

XING Xin; LI Xiaodong; GUO Aiqing; CAO Feng; WANG Jun

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STUDY ON SYNTHESIS AND END-BLOCKING OF POLYMETHYLSILANE

Research Article | 更新时间：2021-03-19

- STUDY ON SYNTHESIS AND END-BLOCKING OF POLYMETHYLSILANE
- Acta Polymerica Sinica Issue 5, Pages: 705-708(2004)
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- Published：20 October 2004，
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XING Xin, LI Xiaodong, GUO Aiqing, CAO Feng, WANG Jun. STUDY ON SYNTHESIS AND END-BLOCKING OF POLYMETHYLSILANE. [J]. Acta Polymerica Sinica (5):705-708(2004)
DOI：

XING Xin, LI Xiaodong, GUO Aiqing, CAO Feng, WANG Jun. STUDY ON SYNTHESIS AND END-BLOCKING OF POLYMETHYLSILANE. [J]. Acta Polymerica Sinica (5):705-708(2004) DOI：

摘要

利用Wurtz反应合成聚甲基硅烷

研究两类溶剂对其组成、分子结构和分子量的影响 .FT-IR和1H-NMR及29Si-NMR分析表明

以甲苯为溶剂

可以避免在溶剂化过程中Kumada重排的发生 ;而以THF/正己烷(1∶6

V/V)为溶剂

聚甲基硅烷容易支化和形成Si—CH2—Si结构 .研究发现

聚甲基硅烷具有复杂的端基结构

封端剂的加入量影响着最终合成聚甲基硅烷的质量.

Abstract

Polymethylsilane (PMS) is the simplest polysilane；it can be synthesized by Wurtz reductive coupling reaction of methyldichlorosilane in different solvent systems. The FT-IR

1H-NMR

29Si-NMR spectra of PMS indicated that the resulting polymers showed Si—CH2—Si segments formed by the Kumada rearrangement when THF／n-hexane was used as solvent

and the Kumada rearrangement can be avoided by the stabilization effect on the silyl radicals when toluene was used as solvent．End-group of the polymer is changeable

and it is optimal to use Me3SiCl as end-blocking agent at a ratio of Me3SiCl／MeHSiCl2=0.045:1.

关键词

聚甲基硅烷溶剂化效应Kumada重排封端剂

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