聚丙烯的极化冷冻效应

Effect of Polarization Cooling in Polypropylene

测量了聚丙烯的极化冷冻效应 ,发现冷冻过程极化强度增加 .用循环变温极化的热刺激电流方法分析 ,结果表明 ,在极化温度低于峰温时峰值增大 ;高于峰温时峰高温侧的电荷量增加 .认为极化冷冻过程促进了聚合物的极化 .

The effect of polarization cooling in polypropylene has been studied. It is found that the polarization increases during quenching process. Further analysis by use of cyclic polarization TSC method where polarizing temperature changes from T p to T 0 then returns to T p shows that when T p is lower than the peak temperature, peak value increases and when T p is higher, the upper side of the peak extends. The polarization cooling strengthens the ability of polymer chains to bound the polarized charges.