Chinese Journal of Magnetic Resonance ›› 1991, Vol. 8 ›› Issue (2): 237-243.

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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 Published:1991-06-05 Online:2018-01-20
  • Supported by:
    This work was supported by Academia Sinica Selected Research Prosram and National Natural Science Foundatioa of China

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