The interdiffusion coefficient in two-component polymeric mixtures
- 1 January 1988
- journal article
- Published by EDP Sciences in Journal de Physique
- Vol. 49 (7) , 1261-1270
- https://doi.org/10.1051/jphys:019880049070126100
Abstract
Starting from the Liouville equation we derive equations for density and concentration fluctuations in two-component polymeric liquids. An exact expression for the interdiffusion coefficient is obtained. As examples we consider mixtures of labelled molecules and the case of polymers solved in a low molecular weight liquid. The relation of the general formula to two widely used approximate formulas is discussedKeywords
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