DIFFERENTIAL SORPTION AND PERMEATION IN VISCOUS MEDIA.

C. J. Durning, J. L. Spencer, Michael Tabor

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

The development of polymeric barrier materials requires a quantitatively accurate description for the diffusion of small organic penetrants in high polymer systems. The common experimental methods for studying this process are sorption and permeation. For sorption, one measures the mass of penetrant sorbed by a polymer sample following a step increase of the penetrant activity in the environment; for permeation one measures the mass throughput following a step increase in the activity on one side of a barrier. Such experiments show that the classical theory for diffusion embodied by Fick's laws cannot describe the process accurately in all cases. This paper advances a new theory of diffusion and presents mathematical equations which are derived for the process description. The discussion is presented under these headings: application to differential transport processes; and analytical solutions for the shear flow of second-order fluids.

Original languageEnglish (US)
Pages (from-to)171-181
Number of pages11
JournalJournal of polymer science. Polymer letters edition
Volume23
Issue number4
StatePublished - Apr 1985
Externally publishedYes

Fingerprint

penetrants
Permeation
sorption
Sorption
Polymers
Fick's laws
high polymers
Shear flow
shear flow
Throughput
Fluids
fluids
polymers
Experiments

ASJC Scopus subject areas

  • Engineering(all)

Cite this

DIFFERENTIAL SORPTION AND PERMEATION IN VISCOUS MEDIA. / Durning, C. J.; Spencer, J. L.; Tabor, Michael.

In: Journal of polymer science. Polymer letters edition, Vol. 23, No. 4, 04.1985, p. 171-181.

Research output: Contribution to journalArticle

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