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The local polymer dynamics of polyethyleneoxide in aqueous solutions were studied by 1H‐ and 13C‐nuclear magnetic relaxation. The concentration dependence is caused by polymer‐polymer interactions, whereas in the concentration independent range the polymer dynamics is mainly determined intramolecularly and by water‐PEO interactions. The latter interaction is influenced by the presence of salts. MW‐dependence of the relaxation rates is not observed for DP > 100. From the dispersion of the 1H relaxation rates, for a PEO‐sample with DP = 360 at a concentration of 0.5 mol/kg, the polymer segment dynamics are evaluated in terms of an overall and an internal motion.
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Breen et al. (1986) studied this question.
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