摘要
用电子辐射和γ-辐射对α-晶型聚丙烯(PP)薄膜进行处理.用声探法测定了材料体电荷充电和松弛动力学曲线.顺磁共振仪检测到烯丙基自由基氧化时间.经γ-辐射的PP试样的充电准稳态程序,最大荷电量和辐射稳定性均有提高.引起该效应的材料状态变化是结构陷阱交深.研究表明,PP中烯丙基自由基淬灭动力学和充电前经过γ-辐射试样的电荷松弛动力学曲线几乎相吻合.论文指出了PP晶相对充电过程和辐射氧化进程的影响.
Accumulation and relaxation of volume charges of α-crystalline polypropylene (PP) films treated by electron beam and/or modified by Y-irradiation have been detected by means of the a-coustic method. The irradiation-oxidation provides with deeper structural trap levels. The coincidence of kinetics of charge relaxation with the annihilation of radicals in PP r-irradiated has been observed.
基金
国家自然科学基金资助项目
