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Prediction of the concentration dependence of diffusion coefficients of polymers in solution
Author(s) -
Qian J. W.,
Rudin Alfred
Publication year - 1989
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.1989.070370720
Subject(s) - polymer , diffusion , solvent , volume fraction , thermodynamics , volume (thermodynamics) , materials science , chemistry , polymer chemistry , organic chemistry , physics
The hydrodynamic volumes of solvated polymers shrink with increasing concentrations in solution until a concentration ( c x ) is reached at which the effective dimensions are those of a Theta solvent. A simple model (Ref. 7) can be used to calculate the volume fraction of solvated polymer coils as a function of concentration. From this, the concentration dependence of diffusion coefficients can be estimated (Ref. 5). Calculated data are in very good agreement with experimental values except for some lower molecular weight polymers in poor solvents.