用NMR方法测定聚合物长侧基转动扩散系数

DETERMINATION OF THE ROTATIONAL DIFFUSION CONSTANTS OF THE SIDE - CHAINS IN POLYMERS BY NMR TECHNIQUE

提出了一种测定聚合物溶液及有机固体中长侧基转动扩散系数的NMR方法,即先导出聚合物溶液和固体中长侧基运动的相关函数和谱密度函数,然后利用^(13)C自旋弛豫数据求出扩散系数.同时还讨论了两个应用实例.

An NMR method is presented for determining the rotational diffusion constants of the side-chains in polymer solutions and solids, that is , first, the correlation functions and spectral density functions of the rotation of the side-chains were derived, and then the rotational diffusion constants of these side-chains were determined with the aid of 13C spin relaxation data. Two applied examples are also discussed.