PRIMARY THERMAL FRAGMENTATION PROCESSES IN POLY(ETHYLENE OXALATE) INVESTIGATED BY MASS-SPECTROMETRY

被引：16

作者：

BALLISTRERI, A ^{[1
]}

GAROZZO, D ^{[1
]}

GIUFFRIDA, M ^{[1
]}

IMPALLOMENI, G ^{[1
]}

MONTAUDO, G ^{[1
]}

机构：

[1] CNR,IST CHIM & TECNOL MAT POLIMERICI,I-95125 CATANIA,ITALY

来源：

POLYMER DEGRADATION AND STABILITY | 1988年 / 21卷 / 04期

关键词：

ORGANIC COMPOUNDS - Pyrolysis - POLYETHYLENES - Chemistry;

D O I：

10.1016/0141-3910(88)90018-3

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 primary thermal decomposition mechanism of poly(ethylene oxalate) (PEO) has been investigated by pyrolysis-mass spectrometry. Several mass spectrometric techniques have been used in order to identify compounds present in the pyrolysis mixture: comparison of electron impact and chemical ionization spectra, high resolution accurate mass measurements and tandem mass spectrometry (daughter and parent ion spectra). The results obtained indicate that intramolecular exchange reactions predominate in the primary thermal fragmentation processes yielding cyclic oligomers up to tetramer. No other pyrolysis products were detectable under our experimental conditions. PEO, prepared by condensation polymerization, was shown by H-NMR to contain up to 7% of diethyleneglycol (DEG) units along the polymer chain. A small amount of cyclic oligomers containing DEG units was detected among the pyrolysis products from PEO.

引用

页码：311 / 321

页数：11

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