导电高聚物的微波吸收机理的研究

本文以“导电孤岛”物理模型阐明界面极化率对导电高聚物电损耗的影响。通过物理模型的数学解析表明,导电高聚物中的“导电孤岛”是导电高聚物的介电损耗的主要来源,并发现“导电孤岛”所引起的介电损耗依赖于“导电孤岛”本身的电导率、介电常数以及它的体积分数。“导电孤岛”物理模型所揭示的介电特性与实验中所观祭到的微波吸收率和导电高聚物的室温电导率有关的实验事实相符合。关键词：

STUDIES ON ABSORPTION MECHANISM OF MICROWAVE ABSORBENT OF CONDUCTING POLYMERS

A physical model of conducting islands is proposed to explaine the characterizations of dielectric loss of conducting polymers caused by interface polarizability. According to this model, the behavior of the electric loss of conducting polymers caused by conducting islands depends on the dielectric constant and the conductivity of conducting islands itself, as well as its volume fraction occupied in the conducting polymers. The characterizations of dielectric loss of conducting polymers proposed by the model of conducting island are consistent with the observations obtained from experiments of microwave absorption of conducting polymers.