文章基本信息

标题：Thermally Stimulated Relaxation and Electrical Conduction Phenomena In Polyacrylamide
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作者：K. Rajendra Prasad
期刊名称：International Journal of Engineering Research
印刷版ISSN：2319-6890
出版年度：2013
卷号：2
期号：2
页码：88-90
出版社：IJER
摘要：Thermally stimulated relaxation (TSR), employing thermally stimulated luminescence (TSL) and thermally stimulated conductivity (TSC) as experimental techniques, in Polyacrylamide (PAA) have been studied; in the temperature range 300 - 480 K. Measurements of electrical conductivity ( . ) at various temperatures, in the same temperature range have been made, in both as-gro wn an d UV-irradiated PAA films; to elucidate the mechanism of charge transport in relation to the macromolecular relaxations in PAA. Two TSL and TSC glow curves with maxima at 375 and 475 K have been observed. The log . vs 1/T plots sho wed two transition temperatures with changes in slopes; indicating the on-set of molecular motion in PAA. The TSL/TSC curves at 475 K are attributed to the . - relaxation near the glass transition temperature of the polymer. The . -relaxation is considered to be associated with the glo w curve at 375 K. Analysis of TSL / TSC curves and electrical conductivity plots have been made and the results are correlated. The two endothermic peaks recorded by Differential scanning calorimetry (DSC) are correlated with the TSL/TSC . and . - relaxations in Polyacrylamide.
关键词：Thermally stimulated relaxation; luminescence; ; Electrical conductivity; Differential Scanning Calorimetry.