Shear-induced nano-macro structural transition in a polymeric bicontinuous microemulsion

K. Krishnan, K. Almdal, W.R. Burghardt, T.P. Lodge, F.S. Bates

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    Bicontinuous microemulsions arise in a narrow concentration range for ternary blends containing two immiscible homopolymers and the corresponding diblock copolymer. Steady shear reveals four distinct regimes of response as a function of shear rate, corresponding to flow-induced transitions in fluid structure. In situ neutron scattering shows flow-induced anisotropy in the nanometer-scale microemulsion structure at moderate shear rates, while higher rates induce bulk phase separation, with micron-size morphology, which is characterized with in situ light scattering and optical microscopy.
    Original languageEnglish
    JournalPhysical Review Letters
    Volume87
    Issue number9
    Pages (from-to)098301.1-098301.4
    ISSN0031-9007
    DOIs
    Publication statusPublished - 2001

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