Thermal decomposition of polyamides in the presence of poly(vinyl chloride)

被引：37

作者：

Czégény, Z ^{[1
]}

Blazsó, M ^{[1
]}

机构：

[1] Hungarian Acad Sci, Chem Res Ctr, Res Lab Mat & Environm Chem, H-1525 Budapest, Hungary

来源：

JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS | 2001年 / 58卷

基金：

匈牙利科学研究基金会;

关键词：

polyamides; PVC; Py-GC/MS; thermal decomposition; pyrolysis;

D O I：

10.1016/S0165-2370(00)00152-2

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Thermal decomposition of aliphatic and aromatic polyamides (polyamide-12, polyamide-6,6 and poly(1,4-phenylene terephthalamide) (Kevlar)) with poly(vinyl chloride) (PVC) was examined by pyrolysis-gas chromatography/mass spectrometry. Polyamide-PVC mixtures (typical mass ratio 1:1) were pyrolysed at 700 and 900 degreesC. It was found that the presence of PVC promoted the hydrolytic decomposition routes of amide groups and volatile nitrile formation from all examined polyamides due to the hydrogen chloride eliminated from PVC under pyrolysis. In the presence of PVC an elevated yield of alkenenitriles was observed from polyamide-12. Benzeneamine is produced from Kevlar instead of benzenediamine in the presence of PVC, and the evolution of benzoic acid, benzenenitrile and benzeneisocyanate is promoted. At 900 degreesC pyrolysis temperature enhanced hydrogen cyanide evolution was observed from polyamide-12 and polyamide-6,6 in the presence of PVC. Mechanisms are proposed for the hydrogen chloride assisted formation of nitriles. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：95 / 104

页数：10

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