聚合物材料中的慢极化介电弛豫

Slow Polarize Dielectric Relaxation in Polymers Materials

用时域方法在低频范围研究了涤纶、聚丙烯、线性低密度聚乙烯、绝缘纸等聚合物材料的介电谱，结果发现随着温度的升高，聚合物的慢极化出现多弛豫机构，而且介电响应函数有别于传统的经验公式。慢极化弛豫机构来源于空间电荷和缺陷的扩散，宏观表现为吸收电流。

Polyethylene terephthalate,polypropylene,insulating papers and linear low density polyethylene were studied using time domain dielectric spectrometer at low frequency range.The results show that these are a lot of slow polarize relaxation mechanism arise from the temperature rising and the response function different from the traditional experiment law.The mechanisms of slow polarize relaxation come from the diffuse of space charges and traps,it is absorption current in the macroscopic.Time domain differential spectroscopy can explain the results.