物理化学学报 >> 1996, Vol. 12 >> Issue (12): 1090-1093.doi: 10.3866/PKU.WHXB19961208

研究论文 上一篇    下一篇

聚丙烯的动态和平衡态热刺激电流

曹万强,王勇,李景德   

  1. 中山大学物理系,广州 510275
  • 收稿日期:1996-06-13 修回日期:1996-09-06 发布日期:1996-12-15
  • 通讯作者: 曹万强

Thermally Stimulated Current of Polypropylene in Equilibrium and Non-equilibrium State

Cao Wan-Qiang,Wang Yong,Li Jing-De   

  1. Department of Physics,Zhongshan University,Guangzhou 510275
  • Received:1996-06-13 Revised:1996-09-06 Published:1996-12-15
  • Contact: Cao Wan-Qiang

摘要:

通常的热刺激电流谱是等速升温测量结果,但解谱时要假设热平衡态的两个基本方程成立,若改进为采用阶跃升温方法,则可不必用这两个假设;实验将直接给出冷冻下来的极化电荷和弛豫时间随温度的变化,以聚丙烯为例对两种方法的测量结果作了比较.

关键词: 聚丙烯, 热刺激电流, 介电谱

Abstract:

Usually the thermally stimulated current (TSC) is a result of measurement for rising temperature at constant rate. To give an explanation of this result, two TSC equations are assumed. If TSC is measured at stepped increasing temperature, there is no need of any equation to use as assumption. The experimental results of two methods for polypropylene are compared. It shows that the usual TSC equations are not correct for TSC measurement; although these equatons are correct in thermal equilibrium state of crystal, but they can not be used for polymer particularly in non-equilibrium state.

Key words: Polypropylene, Thermally stimulated current, Dielectric spectroscopy