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用阶跃升温热刺激电流 (TSC)、束缚电荷和剩余电荷等一系列准静态的方法分析了聚丙烯的电荷储存与释放的温度关系 .提出了降温极化和循环变温极化的TSC方法以研究冷冻过程中极化电荷的变化 .三种准静态的TSC谱与2℃ /min升温的TSC谱相比有 -1 5℃的温度移动 .急速降温极化的电流显示出一个充电峰 ,其原因是聚合物在低温时保持了高温态的结构 ,引起了介电常数的突变 ,导致了聚合物存储较多的束缚电荷 .循环变温极化的TSC方法证实了在降温极化过程中束缚电荷进入了较深的能级 .上述循环变温极化的方法有利于制备聚合物驻极体 ,而急速降温不利于高直流电场或辐射条件下使用的聚合物 .
The temperature dependence of charge storage and release of polypropylene was analyzed by a series of quasi-static methods, such as step-wise thermal stimulation current (TSC), bound charge and residual charge. The TSC method for temperature-controlled and cyclic temperature-programmed polarization The polarization charge changes during the freezing process were studied.The three quasi-static TSC spectra shifted by -1 5 ° C compared to the TSC spectrum heated at 2 ° C / min.The rapidly depolarized polarization showed a charge peak which The reason is that the polymer maintains a high-temperature structure at low temperatures, causing a sudden change in dielectric constant, which results in the storage of more bound charges in the polymer. The cyclic temperature-dependent polarization of TSC method confirms the binding charge Into the deeper energy level.The above method of cyclic temperature polarization is conducive to the preparation of polymer electrets, and rapid cooling is not conducive to high DC field or radiation conditions used in the polymer.