THERMAL REDISTRIBUTION REACTIONS IN CROSS-LINKED POLYSILOXANES

被引：118

作者：

BELOT, V ^{[1
]}

CORRIU, RJP ^{[1
]}

LECLERCQ, D ^{[1
]}

MUTIN, PH ^{[1
]}

VIOUX, A ^{[1
]}

机构：

[1] UNIV MONTPELLIER 2,CNRS,UM 44,USTL CASE 007,PL E BATAILLON,F-34095 MONTPELLIER 05,FRANCE

来源：

JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY | 1992年 / 30卷 / 04期

关键词：

THERMOLYSIS OF CROSS-LINKED POLYSILOXANES; REDISTRIBUTION REACTIONS; SI-C/SI-O AND SI-H/SI-O BONDS EXCHANGE; THERMOGRAVIMETRIC ANALYSIS MASS SPECTROSCOPY; SOLID-STATE SI-29-NMR;

D O I：

10.1002/pola.1992.080300413

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

The thermolysis under argon of various polysiloxane resins containing D, T, D(H), or T(H) units was investigated using thermogravimetric analysis combined with mass spectroscopy (TG/MS analysis) and solid-state Si-29-NMR. Redistribution reactions involving the exchange of Si-C/Si-O bonds or Si-H/Si-O bonds were evidenced in addition to the exchange of Si-O/Si-O bonds reported to date. These reactions significantly modify the initial siloxane units and lead to an escape of volatile silanes or siloxanes. The exchange of Si-H/Si-O bonds takes place at lower temperatures (300-degrees-C) than the exchange of Si-C/Si-O bonds (500-degrees-C).

引用

页码：613 / 623

页数：11

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