EFFECT OF IRRADIATION ON CRYSTALLINITY AND MECHANICAL-PROPERTIES OF ULTRAHIGH MOLECULAR-WEIGHT POLYETHYLENE

被引：39
|
作者：
ZHAO, Y
LUO, YX
JIANG, BZ
机构：
[1] Changchun Institute of Applied Chemistry, Academia Sinica, Changchun
来源：
JOURNAL OF APPLIED POLYMER SCIENCE | 1993年 / 50卷 / 10期
关键词：
Chain scission - Crystallinity - Differential scanning calorimetry - Heat of fusion - High energy irradiation - Irradiation effects - Small angle X ray scattering - Young's modulus;
D O I：
10.1002/app.1993.070501015
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Ultrahigh molecular weight polyethylene (UHMWPE) has been irradiated (0-40 Mrad) with a Co-60 source at room temperature under vacuum. The crystallinity has been investigated by differential scanning calorimetry (DSC) and small-angle X-ray scattering (SAXS). The mechanical properties have been determined at room temperature. A significant increase of heat of fusion can be seen at low irradiation doses, which is attributed to crystallization, caused by chain scission during the process of irradiation. It is also observed that the thickness of the lamellae changes with irradiation dose. The Young's modulus has been improved significantly after irradiation at low doses. (C) 1993 John Wiley & Sons, Inc.
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页码：1797 / 1801
页数：5
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