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前言动态介电分析(dynamic dielectricanalysis,简称 DDA)是物质在一定频率的交变电场下并受一定受控温度程序加热时,测试物质的介电性能随温度变化的一种技术。这一技术已被广泛地应用于研究高聚物电介质的分子结构、聚合程度和聚合物机
Introduction Dynamic dielectric analysis (DDA) is a technique for measuring the dielectric properties of a test substance as a function of temperature when a substance is heated under a certain frequency of alternating electric field and under a controlled temperature program. This technique has been widely used to study the molecular structure of polymer dielectrics, the degree of polymerization and polymer machines