Mutual diffusion in concentrated polymer solutions under a small driving force

C. J. Durning, Michael Tabor

Research output: Contribution to journalArticle

71 Citations (Scopus)

Abstract

A theory is presented for mutual diffusion in concentrated polymer solutions under a small driving force. The crucial concept is that the interdiffusion of polymer and solvent causes deformation of the polymer component. A memory integral contribution to the solvent flux is developed from the transient network and reptation models; analytical formulas for measurables are derived for a polymer behaving like a Maxwell fluid. For sorption experiments, non-Fickian behavior is predicted when the polymer relaxation time matches the sorption time scale, that is, when the diffusion Deborah number is ∼O(1). The predictions agree with non-Fickian behavior observed in classical and oscillatory sorption experiments. The analysis clarifies the potential value of the oscillatory sorption technique.

Original languageEnglish (US)
Pages (from-to)2220-2232
Number of pages13
JournalMacromolecules
Volume19
Issue number8
StatePublished - 1986
Externally publishedYes

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Polymer solutions
Sorption
Polymers
Relaxation time
Experiments
Fluxes
Data storage equipment
Fluids

ASJC Scopus subject areas

  • Materials Chemistry

Cite this

Mutual diffusion in concentrated polymer solutions under a small driving force. / Durning, C. J.; Tabor, Michael.

In: Macromolecules, Vol. 19, No. 8, 1986, p. 2220-2232.

Research output: Contribution to journalArticle

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