Korea-Australia Rheology Journal

The Korean Society of Rheology (한국유변학회)
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Scaling analysis of electrorheological poly(naphthalene quinone) radical suspensions

  • Min S. Cho (Department of Polymer Science and Engineering Inha University) ;
  • Park, Hyoung J. (Department of Polymer Science and Engineering Inha University)
  • Published : 2000.12.01
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Abstract

A semiconducting poly(naphthalene quinone) radical (PNQR) was synthesized from Friedel-Craft acylation between naphthalene and phthalic anhydride and used as dispersing particles of a dry-base electrorheological (ER) material in silicone oil. Under an applied electric field (E), the dynamic yield stress (${\tau}_{dyn}$) of this ER fluid, obtained from a steady shear experiment with a controlled shear rate mode, was observed to increase with $E^{1.45}$ Based on this relationship, we propose a universal correlation curve for shear viscosity, which is independent of E using a scaling analysis.

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