Shear banding and rheochaos in associative polymer networks

J.H.B. Sprakel, E. Spruijt, M.A. Cohen Stuart, N.A.M. Besseling, M.P. Lettinga, J. van der Gucht

    Research output: Contribution to journalArticleAcademicpeer-review

    58 Citations (Scopus)

    Abstract

    We present experimental evidence of an instability in the shear flow of transient networks formed by telechelic associative polymers. Velocimetry experiments show the formation of shear bands, following a complex pattern upon increasing the overall shear rate. The chaotic nature of the stress response in transient flow is indicative of spatiotemporal fluctuations of the banded structure. This is supported by time-resolved velocimetry measurements.
    Original languageEnglish
    Pages (from-to)1696-1705
    JournalSoft Matter
    Volume4
    Issue number8
    DOIs
    Publication statusPublished - 2008

    Keywords

    • cross-linked networks
    • viscoelastic properties
    • micellar-solutions
    • aqueous-solutions
    • rheology
    • behavior
    • systems
    • flows
    • transition
    • simulation

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