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Multicomponent diffusion in polymeric liquids
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DOI：10.1073/pnas.93.15.7440.png)
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Abstract
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It is shown hom the phase-space kinetic theory of polymeric liquid mixtures leads to a set of extended Maxwell-Stefan equations describing multicomponent diffusion. This expression reduces to standard results for dilute solutions and for undiluted polymers. The polymer molecules are modeled as flexible bead-spring structures. To obtain the Maxwell-Stefan equations, the usual expression for the hydrodynamic drag force on a bead, used in previous kinetic theories, must be replaced by a new expression that accounts explicitly for bead-bead interactions between different molecules.
Keywords:
diffusivity
polymer
Maxwell-Stefan equations
transport phenomena
kinetic theory
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9.1
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10.8W
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73.5W
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