STUDIES OF THE SOLID-STATE THERMAL-DEGRADATION OF PVC .1. AUTOCATALYSIS BY HYDROGEN-CHLORIDE

被引：77

作者：

PATEL, K ^{[1
]}

VELAZQUEZ, A ^{[1
]}

CALDERON, HS ^{[1
]}

BROWN, GR ^{[1
]}

机构：

[1] MCGILL UNIV,DEPT CHEM,801 SHERBROOKE ST W,MONTREAL H3A 2K6,QUEBEC,CANADA

来源：

JOURNAL OF APPLIED POLYMER SCIENCE | 1992年 / 46卷 / 01期

关键词：

D O I：

10.1002/app.1992.070460117

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 thermal degradation of virgin and HCl-treated PVC in powder form, as well as of PVC films of different thicknesses, has been studied as a function of time and temperature. The rate of dehydrochlorination was determined conductimetrically and from the polyene sequence distributions as obtained by UV spectroscopy. Increases in the rate of dehydrochlorination, ranging between 30 and 45%, were observed at all temperatures for the samples pretreated with HCl, while the corresponding activation energies were found to be lower by about 20%. For the PVC films, the rate increased with thickness, i.e., with longer residence time of evolved HCl within the sample. The results offer insight regarding the autocatalytic role of evolved HCl.

引用

页码：179 / 187

页数：9

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