Mechanism of decay reaction of free radicals trapped in poly(tetrafluoroethylene) related with the heterogeneity in structure

被引：13

作者：

Hara, S

Yamamoto, K

Shimada, S ^{[2
]}

Nishi, H

机构：

[1] Hitachi Cable Ltd, Hitachi, Ibaraki 3191414, Japan

[2] Nagoya Inst Technol, Showa Ku, Nagoya, Aichi 4668555, Japan

来源：

MACROMOLECULES | 2003年 / 36卷 / 15期

关键词：

D O I：

10.1021/ma030206v

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Reactions of free radicals produced in gamma-irradiated poly(tetrafluoroethylene) (PTFE) were studied by electron spin resonance spectroscopy. beta-Scission reaction of main chain radicals and fluorine abstraction of chain end radicals were detected directly. The decay reactions of the free radicals were examined in connection with molecular motion of the matrix polymer. The rates of those reactions were also discussed in relation to much heterogeneity in structure. Behaviors of free radicals trapped in crosslinked PTFE were compared with those in non-cross-linked PTFE to clarify the effects of molecular motion and structure on the reactions in the solid state.

引用

页码：5661 / 5665

页数：5

共 33 条

[1] ESR STUDIES ON OXIDATION PROCESSES IN IRRADIATED POLYETHYLENE .1. DIFFUSION OF OXYGEN INTO AMORPHOUS PARTS AT LOW-TEMPERATURES [J].