高等学校化学学报 ›› 1984, Vol. 5 ›› Issue (6): 901.

• 研究简报 • 上一篇    

链结构及频率对嵌段聚醚氨酯介电谱的影响

陈竹生1, 段晓青1, 黄祖琇1, 张道范2, 朱镛2   

  1. 1. 北京大学化学系;
    2. 中国科学院物理研究所
  • 收稿日期:1983-03-05 出版日期:1984-12-24 发布日期:1984-12-24

The Effects of Chain Structure and Frequence on the Dielectric Spectra of Segmented Poly(ether-urethane) Copolymer

Chen Zhusheng1, Duan Xiaoqing1, Huang Zuxiu1, Zhang Daofan2, Zhu Yong2   

  1. 1. Department of Chemistry, Peking University, Beijing;
    2. Institute oj physics, Academia Sinica, Beijing
  • Received:1983-03-05 Online:1984-12-24 Published:1984-12-24

摘要: 不少研究者用介电驰豫的方法对聚合物进行了广泛的研究[1-5].对多嵌段的两相体系,介电驰豫的方法很灵敏.我们曾用此法研究了不同扩链剂及软段为聚四亚甲基醚二醇(PTMG)嵌段聚醚氨酯(SPEU)的分子运动,观察到软段结晶的αc[6].本文用介电驰豫方法进一步考察软段链结构不同对温度谱的影响,以及不同驰豫单元的活化能.

Abstract: In this paper, the dielectric spectra of different chain structure of segmented poly(ether-urethane) copolymer have been investigated. All relaxation phenomena were greatly influenced by the molecular weight of the prepolymer. Conditions of the micro-phase separation have been discussed. The apparent activation energies of relaxation processes were determined.

TrendMD: