一、引言高分子材料作为绝缘材料使用时,其介电性能是重要的指标之一。因此,介电性能的测试及其研究受到了国内外许多科学工作者的重视,发表了很多文章和专著。介电性能的研究分为两个方面,一个是测试材料的介电系数、介质损耗角正切,为绝缘结构的设计和电容器的使用提供依据;另一个是通过介电测试来研究高分子材料的结构和性能之间的关系,以指导加工过程和设计新的材料。但高分子材料极其复杂,影响介电性能的因素很多,如何正确认识高分子材料的特性,是研究其介电(或其它)性能的关键。大家知道,高分子的介电性能不是仅由 First, the introduction of polymer materials used as an insulating material, the dielectric properties of one of the important indicators. Therefore, the dielectric properties of the test and its research by many scientists at home and abroad attention, published many articles and monographs. Dielectric properties of the study is divided into two aspects, one is to test the dielectric constant of the material, dielectric loss tangent, for the design of the insulating structure and the use of capacitors provide the basis; the other is through the dielectric test to study the polymer materials The relationship between structure and performance, to guide the process and design new materials. However, the polymer materials are extremely complex and affect the dielectric properties of many factors, how to correctly understand the characteristics of polymer materials, is to study the dielectric (or other) the key performance. We all know that the dielectric properties of polymers is not only by