Gamma irradiation effect upon positron annihilation in ultra high molecular weight poly(ethylene oxide)

被引：8

作者：

Misheva, M

Djourelov, N

Nedkov, ET

机构：

[1] Bulgarian Acad Sci, Inst Nucl Res & Nucl Energy, BU-1784 Sofia, Bulgaria

[2] Univ Sofia, Fac Phys, BU-1126 Sofia, Bulgaria

[3] Bulgarian Acad Sci, Inst Polymers, BU-1113 Sofia, Bulgaria

来源：

RADIATION PHYSICS AND CHEMISTRY | 2001年 / 62卷 / 5-6期

关键词：

positron annihilation; gamma-irradiation of polymers; poly(ethylene oxide);

D O I：

10.1016/S0969-806X(01)00208-0

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：

Positron annihilation technique was used to reveal the evolution of small pore structure of semi-crystalline ultra high molecular weight poly(ethylene oxide) under gamma -irradiation. It has been established that the structure of poly(ethylene oxide) is improved under low dose irradiation (< 20 kGy), while the concentration of free-volume holes in amorphous regions increases at higher doses. The results were compared with those from small angle X-ray scattering and wide angle X-ray scattering measurements of the same samples. (C) 2001 Elsevier Science Ltd. All rights reserved.

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收藏

页码：379 / 385

页数：7

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