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 journalArticlepeer-review

50 Scopus citations

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 (US)
JournalPhysical review letters
Volume87
Issue number9
DOIs
StatePublished - Aug 9 2001

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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