Local modification of solvent dynamics by polymeric solutes

J. L. Schrag, T. M. Stokich, D. A. Strand, P. A. Merchak, C. J T Landry, D. R. Radtke, V. F. Man, T. P. Lodge, R. L. Morris, K. C. Hermann, S. Amelar, C. E. Eastman, M. A. Smeltzly

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26 Scopus citations

Abstract

Extensive oscillatory flow birefringence and dynamic viscoelastic measurements on a variety of polymer-solvent systems indicate that the solvent contributions to the measured solution properties are not given by the neat solvent birefringence or viscosity, respectively, by contrast with the predictions of chain dynamics theory. Rather, the high frequency limiting plateaus observed in the loss components of both the dynamic birefringence and dynamic viscosity, designated S′ and η′, respectively, represent the appropriate solvent contributions. Measurements of solvent rotational and translational friction in some of the same polymer-solvent systems provide direct support for the postulate that the values of S′ and η′ reflect predominantly polymer-induced modifications to the dynamics of the solvent surrounding the chains.

Original languageEnglish (US)
Pages (from-to)537-543
Number of pages7
JournalJournal of Non-Crystalline Solids
Volume131-133
Issue numberPART 2
DOIs
StatePublished - Jun 2 1991

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