An ESR study of irradiated poly(tetrafluoroethylene-co-perfluoropropyl vinyl ether) (PFA)

被引：22

作者：

Dargaville, TR

Hill, DJT ^{[1
]}

Whittaker, AK

机构：

[1] Univ Queensland, Dept Chem, Brisbane, Qld 4072, Australia

[2] Univ Queensland, Ctr Magnet Resonance, Brisbane, Qld 4072, Australia

来源：

RADIATION PHYSICS AND CHEMISTRY | 2001年 / 62卷 / 01期

基金：

澳大利亚研究理事会;

关键词：

poly(tetrafluoroethylene-co-perfluoropropyl vinyl ether); ESR; gamma-irradiation; fluoropolymer; G-value;

D O I：

10.1016/S0969-806X(01)00418-2

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Poly(tetrafluoroethylene-co-perfluoropropyl vinyl ether) (PFA) with 2 mol% perfluoropropyl vinyl ether (PPVE) was exposed to gamma -irradiation in vacuum at both 77 K and room temperature and the ESR spectra recorded. Both the main chain, similar to CF2-(CF)-F-.-CF(2)similar to, and end chain, similar to (CF2CF2)-F-. radicals were identified at both temperatures and their thermal stabilities measured, No radicals unique to the radiolytic cleavage at the PPVE units were observed at room temperature, either due to the low concentration of the comonomer or beta -scission to form a chain end radical and a nonradical species. G-values for radical formation at room temperature and 77 K were found to be 0.93 and 0.16, respectively. (C) 2001 Elsevier Science Ltd. All rights reserved.

引用

页码：25 / 31

页数：7

共 30 条

[1] Analysis of the ESR spectra of the ∼CF2CFCF2∼ macroradical trapped in a γ-irradiated polytetrafluoroethylene matrix at 77 K [J].