POLY(CARBOSILANE) PRECURSORS OF SILICON-CARBIDE - THE EFFECT OF CROSS-LINKING ON CERAMIC RESIDUE

被引：51

作者：

BOURY, B ^{[1
]}

CORRIU, RJP ^{[1
]}

DOUGLAS, WE ^{[1
]}

机构：

[1] UNIV MONTPELLIER SCI & TECH LANGUEDOC,RHONE POULENC,CNRS,UMR 44,UNITE MIXTE CNRS,F-34095 MONTPELLIER 5,FRANCE

来源：

CHEMISTRY OF MATERIALS | 1991年 / 3卷 / 03期

关键词：

D O I：

10.1021/cm00015a024

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Poly(carbosilanes) of general structure X[-Si(H)(Y)C2H4-]n-SiH2Z (I, X = Y = H, Z = vinyl; II, X = Y = Z = H; III, X = Z = vinyl, Y = H; IV, X = Z = vinyl, Y = vinyl and H) have been prepared by means of hydrosilylation polymerization, followed by chemical transformation of the resulting polymer including a final LiAlH4 reduction step. Thus, I was prepared from dichlorovinylsilane (V), II from V together with trichlorosilane as a chain-terminating agent, and III from V together with dichlorodivinylsilane as a chain-terminating agent. IV was made by polymerization of anisylvinylsilane followed by anisyl group cleavage with HCl/AlCl3 and then reaction with vinyl Grignard reagent. Ceramic yield from I-IV was found to increase with polymer vinyl group content, ranging from a low yield for I (12%) to a high yield for IV (60%). This is explained by cross-linking through hydrosilylation occurring during pyrolysis, as shown by the exotherm at ca. 200-degrees-C, and also by changes in the IR spectrum.

引用

页码：487 / 489

页数：3

共 20 条

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