DIFFUSION OF MACROMOLECULES: A CONSTITUTIVE THEORY

A constitutive diffusion theory for polymer solutions is proposed based on a thermomechanical mixture theory. A general expression for the diffusion flux in a binary polymer-solvent system is presented. It is shown that the current approach is capable of sorting out various complex diffusion phenome...

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Bibliographic Details
Published in:Chemical engineering communications 1986-04, Vol.41 (1-6), p.73-99
Main Authors: COHEN, YORAM, METZNER, A.B.
Format: Article
Language:English
Subjects:
Applied sciences
Diffusion
Exact sciences and technology
Macromolecules
Organic polymers
Physicochemistry of polymers
Polymer Theory of mixtures
Properties and characterization
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Summary:A constitutive diffusion theory for polymer solutions is proposed based on a thermomechanical mixture theory. A general expression for the diffusion flux in a binary polymer-solvent system is presented. It is shown that the current approach is capable of sorting out various complex diffusion phenomena. In particular, the dependence of the diffusion flux on a gradient of a generalized chemical potential emerges naturally by considering the limit of "weak equilibrium".
ISSN:0098-6445
1563-5201
DOI:10.1080/00986448608911713