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高分子材料中的微观结构和动力学特征决定了材料的最终物理化学性能,并具有典型的时间和空间上的多尺度特性。在不同时空尺度上表征凝聚态下高分子中多尺度的结构、动力学及其动态演变等问题,进而阐明其结构-性能间的关系一直是高分子科学研究中的挑战性课题。目前,固体NMR技术已成为从原子至100nm的空间和10-9～10s的时间尺度上研究固态高聚物体系中多层次结构和复杂运动并阐明其结构与性能关系的有力工具。本文将综述我们近年来系统构建的多尺度固体NMR实验技术,及其在阐明高分子链结构、链间相容性和相互作用、界面相结构及相区尺寸、以及从高频到超慢链运动等问题中的应用。
The microstructural and kinetic characteristics of a polymer material determine the final physical and chemical properties of the material, with typical temporal and spatial multiscale properties. The characterization of multi-scale structure, dynamics and dynamic evolution of polymers in condensed matter at different spatiotemporal scales, and further elucidation of the relationship between structure and properties has been a challenging issue in polymer science. At present, the solid-state NMR technology has become a powerful tool to study the multi-level structure and complex motion in the solid polymer system from the atomic to the 100 nm space and the 10-9 to 10 s time scale and clarify the relationship between the structure and the performance. In this article, we review our recent systematic multi-scale solid state NMR experimental techniques and their applications in elucidating polymer chain structures, interchain compatibility and interactions, interfacial phase structure and phase size, as well as high frequency to ultra slow chain Exercise and other issues in the application.