Radical processes initiated by ionizing radiation in PEEK and their macroscopic consequences

被引：19

作者：

Kornacka, Ewa Maria ^{[1
]}

Przybytniak, Grazyna ^{[1
]}

Nowicki, Andrzej ^{[1
]}

机构：

[1] Inst Nucl Chem & Technol, Ul Dorodna 16, PL-03195 Warsaw, Poland

来源：

POLYMERS FOR ADVANCED TECHNOLOGIES | 2019年 / 30卷 / 01期

关键词：

aromatic polymers; degradation; EPR/ESR; irradiation; radicals; AROMATIC POLYMERS; ELECTRON; IRRADIATION; POLYETHERETHERKETONE; DEGRADATION; EPR;

D O I：

10.1002/pat.4445

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Poly (ether ether ketone) was irradiated with gamma rays or electron beam to investigate the radical process. The generated paramagnetic species were observed by electron spin resonance spectroscopy at ambient temperature and in liquid nitrogen. The effect of microwave power on saturation of the particular spectra and thermal annealing effects were determined. The following radicals were identified: radical anion, phenoxyl radical, and phenylperoxy radical. Despite the fact that the intermediates were formed as a result of backbone cleavage causing degradation, the macroscopic features were almost unaffected by irradiation up to dose of 1500 kGy.

引用

页码：79 / 85

页数：7