An electron spin resonance analysis on gamma-irradiated poly(glycolic acid) and its copolymers with lactic acid

被引：23

作者：

Babanalbandi, A ^{[1
]}

Hill, DJT ^{[1
]}

ODonnell, JH ^{[1
]}

Pomery, PJ ^{[1
]}

机构：

[1] UNIV QUEENSLAND,DEPT CHEM,POLYMER MAT & RADIAT GRP,BRISBANE,QLD 4072,AUSTRALIA

来源：

POLYMER DEGRADATION AND STABILITY | 1996年 / 52卷 / 01期

基金：

澳大利亚研究理事会;

关键词：

D O I：

10.1016/0141-3910(95)00230-8

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 effect of gamma radiation on poly(glycolic acid) and its copolymers with D,L-lactic acid has been examined using electron spin resonance (ESR) spectroscopy. The G-values for radical formation in poly(glycolic acid) and the copolymers have been determined and values of G(R) congruent to 1.7 and G(R) congruent to 1.5 were obtained at 77 and 300 K, respectively. The G(R) results obtained for the copolymers fitted the Linear Additive Model. At 77 K the ESR spectrum of poly(glycolic acid) is composed of three components. One component has been assigned to the radical formed by loss of a H atom from the methylene group and the other two are formed as a result of chain scission and loss of the ester linkage. (C) 1996 Published by Elsevier Science Limited

引用

页码：59 / 66

页数：8

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