Mode selection in the dynamics of sheared polymer solutions

P. K. Dixon, D. J. Pine, X. L. Wu

Research output: Contribution to journalArticlepeer-review


We report transient light-scattering measurements upon the cessation of shear for a semidilute polymer solution under theta conditions. The polymer solution demonstrates two modes of relaxation for concentration fluctuations in equilibrium. The transient measurements show that the mechanism that couples the concentration fluctuations to the shear flow, and thereby enhances concentration fluctuations, selectively enhances only the slower of the two equilibrium modes. This selective enhancement generates a long-wavelength peak in the shear-enhanced structure.

Original languageEnglish (US)
Pages (from-to)2239-2242
Number of pages4
JournalPhysical Review Letters
Issue number14
StatePublished - 1992

ASJC Scopus subject areas

  • General Physics and Astronomy


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