Multicomponent diffusion involving high polymers. III. Ternary diffusion in the system polystyrene 1-polystyrene 2-toluene

E. L. Cussler, E. N. Lightfoot

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Abstract

Ternary diffusion coefficients for two concentrations of mixtures of two monodisperse polystyrenes of different molecular weight in toluene were measured at 25.00° with the Gouy interferometer. This system was chosen as a model of a polydisperse polymer suitable for experimental study. The results show large multicomponent effects for diffusion coefficients based on concentration gradient. The coefficients measured satisfy the Onsager reciprocal relations within experimental error. They are in qualitative agreement with those predicted from extensions of the hydrodynamic model.

Original languageEnglish (US)
Pages (from-to)2875-2879
Number of pages5
JournalJournal of physical chemistry
Volume69
Issue number9
DOIs
StatePublished - Jan 1 1965
Externally publishedYes

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