Free Volume and Transverse Relaxation in Polymer Solutions
NMR has proven to be a very effective tool for the study of polymer motions. In this study, we have labeled poly(isopropyl acrylate), (PIPA) in the backbone methine position with deuterium. Thus only one resonance per spectrum is observed and the results of the relaxation time measurements can be used to probe polymer motions. It is found that T//2 measurements can be used to study the transition from semi-dilute to concentrated solution. T//2 values can also be seen to exhibit either a concentration or temperature superposition predicted by simple-free volume approaches.
F. D. Blum et al., "Free Volume and Transverse Relaxation in Polymer Solutions," American Chemical Society, Polymer Preprints, Division of Polymer Chemistry, American Chemical Society (ACS), Jan 1984.
Article - Conference proceedings
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