辐射研究与辐射工艺学报2025，Vol.43Issue(1)：21-31,11.DOI:10.11889/j.1000-3436.2024-0054
三种聚乙烯薄膜的后辐射氧化反应
Post-radiation oxidation reaction of three types of polyethylene films
摘要
Abstract
The long-term,slow reaction that occurs when polyethylene(PE)is exposed to oxygen after ionizing radiation is known as post-radiation oxidation,which significantly affects the long-term performance of radiation-modified PE materials.In this study,an ultrahigh molecular weight polyethylene(UHMWPE)film,a high-density polyethylene(HDPE)film,and a low-density polyethylene(LDPE)film were selected as typical PE materials and irradiated with γ-rays.Subsequently,the carbonyl products of the post-radiation slow oxidation reaction were quantitatively analyzed using Fourier transform infrared spectroscopy and by varying the temperature,oxygen partial pressure,and absorbed dose.The effects of these factors on the oxidation behavior of PE after radiation were systematically investigated.Post-radiation oxidation was clearly observed in the UHMWPE and HDPE films.Meanwhile,the LDPE film showed weak post-radiation oxidation,which could be maintained for a long time at room temperature,with the highest reaction rate occurring at 50 ℃.However,above 70 ℃,the oxidation reaction could only be maintained for a few hours.Additionally,a significant positive correlation was observed among the post-radiation oxidation reaction,oxygen partial pressure,and absorbed dose.This study not only offers a new perspective for understanding the post-radiation oxidation reaction of PE but also provides guidance for improving the accelerated-aging evaluation of radiation-modified PE materials.关键词
聚乙烯/γ射线辐照/后辐射氧化反应/傅里叶变换红外光谱Key words
Polyethylene/γ-ray radiation/Post-radiation oxidation reaction/Fourier transform infrared spectroscopy分类
能源科技引用本文复制引用
韩磊,王静,鲁曼丽,张文礼,沈蓉芳,刘伟华,王谋华..三种聚乙烯薄膜的后辐射氧化反应[J].辐射研究与辐射工艺学报,2025,43(1):21-31,11.基金项目
国家自然科学项目(No.12375357) Supported by National Natural Science Foundation of China(No.12375357) （No.12375357）
