Abstract
Polymer self-diffusion coefficient Ds in entangled systems is formulated by postulating the free chain model and estimating the noodle effect on the basis of three assumptions. Here, the noodle effect refers to the frictional resistance exerted on a diffusing chain by its surrounding chains. For highly entangled solutions of a monodisperse polymer, Ds corrected for the segment friction coefficient is shown to vary linearly with cp−1.5M−2.5, where cp and M are the mass concentration and molecular weight of the polymer, respectively. The corresponding results for binary blends of homologous monodisperse polymers are compared with some published data, and a fairly good agreement is found between theory and experiment.
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Fujita, H., Einaga, Y. Self Diffusion and Viscoelasticity in Entangled Systems I. Self-Diffusion Coefficients. Polym J 17, 1131–1139 (1985). https://doi.org/10.1295/polymj.17.1131
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DOI: https://doi.org/10.1295/polymj.17.1131