Rheological properties of bent-core liquid crystals

C. Bailey, K. Fodor-Csorba, J. T. Gleeson, S. N. Sprunt, A. Jákli

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Abstract

We show that bent-core liquid crystalline materials exhibit non-Newtonian flow in their optically isotropic liquid phase. We conjecture that this behavior is due to the existence of nanostructured, fluctuating clusters composed of a few smectic-like layers. Shear alignment of these clusters explains the shear thinning observed in bent-core liquid crystals having either a nematic phase or non-modulated smectic phase. By contrast, smectogens having a modulated smectic phase do not shear thin at low shear rates, but even show a slight shear thickening which may be due to entanglements of wormlike and/or helical clusters.

Original languageEnglish
Pages (from-to)3618-3622
Number of pages5
JournalSoft Matter
Volume5
Issue number19
DOIs
Publication statusPublished - Sep 28 2009

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ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics

Cite this

Bailey, C., Fodor-Csorba, K., Gleeson, J. T., Sprunt, S. N., & Jákli, A. (2009). Rheological properties of bent-core liquid crystals. Soft Matter, 5(19), 3618-3622. https://doi.org/10.1039/b907261f