摘要
聚合物的电性能与其物理、化学、微观结构密切相关。通过电声脉冲(PEA)法测量少量茂金属聚乙烯(MPE)与低密度聚乙烯(LDPE)共混物在不同场强作用下的去极化特性。根据空间电荷限制电流(SCLC)理论,通过公式推导求解共混物平均电荷体密度、视在迁移率、陷阱深度分布及阈值场强。结果表明,1%MPE与LDPE共混,能有效减少深陷阱密度,增加浅陷阱密度,提高电荷迁移率和阈值场强。
Dielectric properties of polymer are related to its physical, chemical and microstructural structures. The depolarization characteristics of low-density polyethylene （LDPE） blended with a small amount of metallocene catalyzed polyethylene （MPE） are measured by pulsed electro-acoustic （PEA） method under various stresses. According to space charge limited current （SCLC） theory, the derivation of quantities such as mean volume density of space charge, apparent trap-controlled mobility, trap depth distribution and threshold stress is discussed. The test results show that LDPE blended with 1 wt% MPE can effectively decrease deep trap density, increase shallow trap density, and improve the mobility of charges and threshold stress.
出处
《电工技术学报》
EI
CSCD
北大核心
2008年第9期26-31,共6页
Transactions of China Electrotechnical Society
关键词
空间电荷测量
视在迁移率
陷阱深度及分布
阈值场强
Space charge measurement, apparent mobility, trap depth distribution, threshold stress
