Radiation effects on LDPE/EVA blends

被引：57

作者：

Dalai, S ^{[1
]}

Chen, WX ^{[1
]}

机构：

[1] Beijing Normal Univ, Dept Chem, Beijing 100875, Peoples R China

来源：

JOURNAL OF APPLIED POLYMER SCIENCE | 2002年 / 86卷 / 05期

关键词：

radiation effects; LDPE/EVA blends; compatibility; amorphous region's content; vinyl acetate content;

D O I：

10.1002/app.11125

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Radiation effects of low-density polyethylene/ethylene-vinyl acetate copolymer (LDPE/EVA) blends were discussed. EVA content in the LDPE/EVA blends was an enhancement effect on radiation crosslinking of LDPE/EVA blends, and the highest radiation crosslinking was obtained when the EVA content was reached at 30% when irradiated by gamma-ray in air. The phenomenon was discussed with the compatibility, morphology, and thermal properties of LDPE/EVA blends and found that the enhanced radiation crosslinking of the LDPE/EVA blends was proportional to the good compatibility, the increasing degree of the amorphous region's content of the LDPE/EVA blends, and the vinyl acetate content of EVA. We also found that the vinyl acetate of EVA in the blends is easily oxidized by gamma-ray irradiation in air. The possible radiation crosslinking and degradation mechanism of LDPE/EVA blends was discussed quantitatively with a novel method "step-analysis" process of irradiated LDPE/EVA blends in the thermal gravimetric analysis (TGA) technique. (C) 2002 Wiley Periodicals, Inc.

引用

页码：1296 / 1302

页数：7

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