Diffusion and nuclear magnetic relaxation in concentrated polystyrene solutions |
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| Authors: | T Cosgrove RF Warren |
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| Affiliation: | School of Chemistry, University of Bristol, Bristol BS8 1TS, UK;Department of Chemistry, University of Manchester, Manchester M13 9PL, UK |
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| Abstract: | Nuclear magnetic relaxation times (T1 and T2) and diffusion coefficients (D) of polystyrene solutions in d8 toluene have been measured as a function of molecular weight. The polymer T1, T2 and D values decrease monotonically with increasing molecular weight. T1 and D reach limiting values at high molecular weights. The results are interpreted in terms of chain entanglements and the time scale of the experimental method. |
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