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Diffusion coefficient measurements by solvent absorption in concentrated polymer solution
Author(s) -
Hansen Charles M.
Publication year - 1981
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1981.070261011
Subject(s) - diffusion , effective diffusion coefficient , solvent , polymer , absorption (acoustics) , attenuation coefficient , thermodynamics , diffusion layer , materials science , analytical chemistry (journal) , chemistry , chromatography , optics , organic chemistry , composite material , physics , medicine , layer (electronics) , magnetic resonance imaging , radiology
Diffusion coefficient measurements for solvents in concentrated polymer solutions require consideration of both concentration dependence of the diffusion coefficient and surface resistance to mass transport. Solutions to the diffusion equation have been generated where these effects are explored. A method to account for both concentration dependence and surface (absorption) resistance in the experimental determination of diffusion coefficients is given and demonstrated with an example where a multiplying factor of over 300 is required to adjust the apparent diffusion coefficient to the value sought.