高聚物分子运动的核磁共振研究

研究核磁共振谱的分子运动效应.实验上,研究实现用常规探头测量对于分子运动敏感的碳氢偶极谱的新途径;理论上,在一定分子运动模型下,推倒计算理论谱的公式,并程序化,最终建⒀芯扛呔畚锓肿釉硕奶记馀技椎亩舜殴舱裥路椒?该项研究对于详细表征高聚物中的分子运动,获取相关的新知识,具有十分重要的科学意义.

This project is investigating the molecular motion effect of NMR spectra, which focus on the 2D 13C-1H dipolar spectra. It combines both the theory and experiment to develop the new experimental method, which can precisely investigate 2D solid MAS 13C-1H dipolar spectra. And the method is put into use of analyzing the polymer molecular motion. It does not use the expensive variable angle magic spinning probe, but selects the regular 13C-1H magic probe. It does not eliminate the spinning sideband patterns, but fully utilizes it to investigate the polymer molecular motion. We prepare a new 2D pulse sequence and have successfully obtained the isotactic polypropylene. On the whole this method has crucial scientific value in obtaining new information of molecular motion by investigating the polymer molecular motion.