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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。
It is an effective and direct method to measure self-diffusion coefficient of polymer system by NMR method. In this paper, we report the experimental results of the NMR method for measuring the self-diffusion coefficient of polymers in solution, and study the self-diffusion phenomenon of the polystyrene-based and θ-solution systems. De-Gennes “creep” theory provides experimental verification.