Abstract
N.m.r. relaxation data of molten poly(ethylene oxide) are quantitatively analysed by the aid of the three components of molecular motion, defined previously. Polymer motion is described by the crankshaft fluctuation of orientation conserving defects and by longitudinal chain diffusion. Furthermore, a rotational diffusion of the local chain orientation is discussed. The theory explains the molecular weight dependence of the T 1 dispersion, the size of T 2, the different behaviour of highly concentrated solutions and the temperature dependence of T 1. The parameters, used for the description of the relaxation data, are compatible with data derived from other investigations. In addition, dielectric and mechanical relaxation data are qualitatively compared with the proposed model. The essential relaxation features of all methods agree well with the predictions of the three component description.
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