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Solvent and temperature effects on diffusion in polymer–solvent systems
Author(s) -
Vrentas J. S.,
Duda J. L.
Publication year - 1977
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.1977.070210627
Subject(s) - solvent , polystyrene , diffusion , thermodynamics , theta solvent , volume (thermodynamics) , polymer , solvent effects , materials science , molar volume , polymer chemistry , chemistry , chemical physics , organic chemistry , physics , composite material
The temperature dependence of the mutual diffusion coefficient at zero solvent concentration for a number of polystyrene–solvent systems is satisfactorily represented by an equation derived from a new version of the free‐volume theory of molecular transport. The free‐volume parameter which governs the temperature dependence of the diffusion rate is linearly related to the size of the solvent as estimated by its molar volume at OK. Data taken on various polystyrene–solvent systems are used to deduce information on the mechanism of solvent transfer in polymeric systems.