首页> 外文会议>Materials and applications for sensors and transducers II >THERMALLY STIMULATED DISCHARGE CURRENTS OF POLY(ACRYLONITRILE-CO-ACRYLICACID)-POLYPYRROLE COMPOSITES
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THERMALLY STIMULATED DISCHARGE CURRENTS OF POLY(ACRYLONITRILE-CO-ACRYLICACID)-POLYPYRROLE COMPOSITES

机译:聚(丙烯腈-共-丙烯酸)-聚丙烯腈复合材料的热激发放电电流

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摘要

Thermally Stimulated Discharge Currents, one of the oldest destructive method widely used for studying the mechanisms of polarization and depolarization within the dielectrics was employed for determining information related to trapped and/or detrapped charges and activation energy (Ea) within P(AN-co-AA)-PPy composite films. Two peaks or two relaxation regions could be noticed on the TSDC spectra for each material under test: one at a temperature around 323.15K (50℃), attributed to decomposition due to DMF removal as presented in our previous studies, and a second one at 363.15K (90℃), attributed to glass transition temperature. An increased of detrapped charges was observed when the PPy quantity within the P(AN-co-AA) matrix was increased. The same time, both relaxations appeared at very close temperatures for all three samples under test. Complementary measurements for an in-depth electrical analysis were performed with the help of Broadband Dielectric Spectroscopy (BDS), while further information regarding conductive composites structures was obtained through FTIR-ATR analysis.
机译:热激励放电电流是最广泛用于研究电介质内极化和去极化机理的最古老的破坏性方法之一,用于确定与P(AN-co-co)中被俘获和/或去俘获的电荷以及活化能(Ea)有关的信息AA)-PPy复合膜。对于每种被测材料,在TSDC光谱上可以看到两个峰或两个弛豫区域:一个在323.15K(50℃)左右的温度下,归因于我们先前研究中介绍的由于DMF去除而引起的分解,另一个在25℃下。 363.15K(90℃),归因于玻璃化转变温度。当P(AN-co-AA)基质中的PPy量增加时,观察到去离子电荷的增加。同时,所有三个被测样品在非常接近的温度下都出现了两种弛豫。在宽带介电谱(BDS)的帮助下,进行了深入的电分析的补充测量,而有关导电复合材料结构的更多信息则通过FTIR-ATR分析获得。

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