波谱学杂志 ›› 1991, Vol. 8 ›› Issue (2): 237-243.

• 研究论文 • 上一篇    

高分子溶液体系的自扩散系数的NMR测量

王琦1, 李子荣1, 孟庆安1, 毕喜平2, 应琦琮2   

  1. 1. 中科院物理所;
    2. 中科院化学所
  • 收稿日期:1990-09-19 出版日期:1991-06-05 发布日期:2018-01-20
  • 基金资助:
    This work was supported by Academia Sinica Selected Research Prosram and National Natural Science Foundatioa of China

THE MEASUREMENT OF SELF-DIFFUSION COEFFICIENTS OF POLYSTYRENE SOLUTIONS BY NMR

Wang Qi1, Li Zirong1, Meng Qingan1, Bi Xiping2, Ying Qicong2   

  1. 1. Institute of Physics, Academia Science;
    2. Institute of Chemistry, Academia Science
  • Received:1990-09-19 Online:1991-06-05 Published:2018-01-20
  • Supported by:
    This work was supported by Academia Sinica Selected Research Prosram and National Natural Science Foundatioa of China

摘要: 用核磁共振方法测量高聚物体系的自扩散系数是一种有效而直接的方法。本文报告了用核磁共振方法测量高分子在溶液中自扩散系数实验方法的研究结果,并对聚苯乙烯良溶液体系和θ溶液体系的自扩散现象进行了研究和比较,为半浓溶液范围的de-Gennes的"蠕动"理论提供了实验验证。

关键词: 自扩散系数, 核磁共振, 高分子溶液

Abstract: The self-diffusion coefficients of polystyrene (PS) dissolved in CCl4 and in CCl4+D3COD at θ condition were measured by the spin echo pulsed field gradient method. The dependence of the measured self-diffusion coefficient on concentration and molecular weight was proved basically to follow the scaling law of the rcptation model by de-Gennes.

Key words: Self-diffusion coefficient, NMR, Polystyrene solution