Transitions and relaxations in gamma-irradiated polypropylene studied by positron annihilation lifetime spectroscopy

被引：6
作者：
Djourelov, N
Suzuki, T
Shantarovich, VP
Dobreva, T
Ito, Y
机构：
[1] High Energy Accelerator Res Org, KEK, Tsukuba, Ibaraki 3050801, Japan
[2] Russian Acad Sci, Inst Chem Phys, Moscow 117334, Russia
[3] Bulgarian Acad Sci, Inst Polymer, BU-1113 Sofia, Bulgaria
[4] Univ Tokyo, JAERI, RCNT, Tokai, Ibaraki 3191106, Japan
来源：
RADIATION PHYSICS AND CHEMISTRY | 2005年 / 72卷 / 01期
基金：
日本学术振兴会;
关键词：
positron annihilation; polypropylene; transition; relaxation;
D O I：
10.1016/j.radphyschem.2003.12.049
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：
The changes in the relaxation and transition temperatures in PP due to gamma irradiation in a vacuum were measured by means of positron annihilation lifetime spectroscopy. It was shown that the gamma and beta relaxation temperatures, as well as the melting point follow the changes in the crystallinity with the irradiation dose. For the glass transition temperatures and premelting point, after irradiation dose of 88 kGy, an inverse of the changes was observed. (C) 2004 Elsevier Ltd. All rights reserved.
引用
收藏
页码：13 / 18
页数：6
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