Effect of hydrostatic pressure on polystyrene diffusivity in toluene

Benny D. Freeman, David S. Soane, Morton M. Denn

Research output: Contribution to journalArticleResearchpeer-review

Abstract

The pressure dependence of the mutual diffusion coefficient of selected polystyrene-in-toluene solutions is determined by dynamic light scattering. Decreases in the observed diffusivity with pressure can be explained by changes in the polymer concentration (due to solution compression) and decreases in the solvent fluidity (due to lowering of the system free volume). Quantitative correlations of diffusivity are established for different polymer concentrations and molecular weights, and the results are compared with theoretical predictions.

Original languageEnglish
Pages (from-to)245-251
Number of pages7
JournalMacromolecules
Volume23
Issue number1
DOIs
Publication statusPublished - 1990
Externally publishedYes

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