APPLICATIONS OF TRIPLE-RESONANCE NMR TECHNIQUES TO THE STUDY OF POLYMER STRUCTURE AND REACTIVITY

The utility of isotopic labeling combined with triple resonance nuclea r magnetic resonance (NMR) techniques for polymer structure and reacti vity investigations will be demonstrated. One dimensional (1D) and two dimensional (2D) H-1/F-19/C-13 triple resonance NMR experiments have been used to study the structure of fluoropolymers; and H-1/H-2/C-13 t riple resonance techniques have been used to study the reactivity of p oly[styrene-alt-(methyl methacrylate)] and the structure of deuterated polybutadiene. These methods provide a unique ability to selectively detect resonances of structural features that are present in minute am ounts in polymers, without interference from the much larger signals o f the rest of the polymer.