用等温电流法研究自由基清除剂的作用机理——聚合物电老化陷阱理论的实验验证  

STUDY ON THE ACTION MECHANISM OF THE FREE RADICAL SCAVENGER WITH ISOTHERMAL-CURRENT DECAY METHOD—AN EXPERIMENTAL VERIFICATION OF TRAP THEORY FOR ELECTRICAL AGING IN POLYMER

作　　者：尹毅[1] 屠德民[1] 李明[1] 李忠华[1] 

机构地区：[1]西安交通大学电气绝缘研究所,陕西省西安市710049

出　　处：《中国电机工程学报》2000年第3期13-15,25,共4页Proceedings of the CSEE

基　　金：国家教委博士点基金;西安交通大学研究生院博士论文基金

摘　　要：首先对含有自由基清除剂以及纯聚乙烯的薄膜试样进行了准均匀电场下的电老化试验 ,发现自由基清除剂能够提高均匀电场下聚乙烯的电老化寿命。对老化试样进行等温电流衰减试验 ,测得其中的陷阱能级分布 ,结果表明作为浅陷阱存在于试样中的自由基清除剂 ,能够有效地减少电老化过程中深陷阱的产生 ,从一个侧面验证了聚合物电老化的陷阱理论。In this paper the low density polyethylene samples with and without the free radical scavenger(FRS) are aged under quasi uniform electrical stress, and the test results show that the FRS can increase the breakdown strength of LDPE greatly. In addition, the energy level distribution of traps in these samples aged for various time are measured by isothermal current decay method. It is shown that the FRS can reduce the producing of deep traps during the electrical process, which offers good evidence on the reasonableness of trap theory for electrical aging in polymer.

关 键 词：聚合物 电老化 自由基清除剂 等温电流法 陷阱 

分 类 号：TM201.3[一般工业技术—材料科学与工程]