Field Gradient NMR for Polymer Systems with Cavities

Abstract

A review. Pulse field gradient (PFG) NMR method has become a useful technique for studying self-diffusion of probe mols. in polymer systems. Recently, high field-gradient NMR system with a max. strength of more than 1,000 G/cm and new pulse sequences are possible to measure the diffusion coeff. (D) with the order of 1-10-1-cm2/s in polymer systems. It is expected that the use of this system leads to sophisticated knowledge on nature of polymer systems as well as diffusional behavior of probe mols. in polymer systems. A no. of papers, reviews, and monographs in this field have appeared. In this section, some of most recent topics esp. characterization of the polymer systems such as polymer gels and polymer media with controlled cavity through the diffusion expts. rather than principle of PFG NMR system and diffusional behavior of polymer chains have been described.Editor(s): Webb, Graham A. Publisher: Springer, Dordrecht, Neth