物理化学学报 >> 1997, Vol. 13 >> Issue (10): 921-924.doi: 10.3866/PKU.WHXB19971011

研究论文 上一篇    下一篇

聚合物中激化的冷冻和热刺激

曹万强,王勇,刘俊刁,肖忠模,李景德   

  1. 中山大学物理系,广州 510275
  • 收稿日期:1996-12-31 修回日期:1997-06-09 发布日期:1997-10-15
  • 通讯作者: 李景德

The Frozen and Thermally Stimulated Polarization in Polymer

Cao Wan-Qiang,Wang Yong,Liu Jun-Diao,Xiao Zhong-Mo,Li Jing-De   

  1. Department of Physics,Zhongshan University,Guangzhou 510275
  • Received:1996-12-31 Revised:1997-06-09 Published:1997-10-15
  • Contact: Li Jing-De

摘要:

用等速升温、阶路升温、冷冻电荷、剩余电荷等方法测量了聚丙烯的热刺激电流.对于α和β峰,冷冻电荷方法有更高的分辨率和对称的线型.热刺激电流包含了快极化和慢极化机构的贡献,但线型主要决定于后者.慢极化涉及聚合物长分子链局部链段的运动与束缚空间电荷的相互作用.

关键词: 聚丙烯, 热刺激电流, 慢极化

Abstract:

The thermally stimulated current of polypropylene is studied using methods of linear and step rising temperature, frozen charges, and residual polarization. For α and β peaks, the frozen charge method gives excellent resolving power and symmetry line shape. There are contributions of fast and slow polarization mechanisms to the thermally stimulated current, but the line shape is determined mainly by the slow mechanism. The slow polarizations originate from the interaction of the segment movement in a long chain with the bounded space charges.

Key words: Polypropylene, Thermally stimulated current, Slow polarization