Abstract
The electro-rheological (ER) response of an anisotropic solution of a commercially available poly(hexyl isocyanate) (PHIC) in p-xylene with a concentration of 30 wt% was measured at a shear rate of 2.56 s−1 by our parallel plates sliding rheometer. The solution was deformed at the shear rate to be a steady flow, and subsequently it was stimulated by step-wise electric fields with amplitudes up to 3.0 kV mm−1. In the transient ER response, the stress overshoot was observed at electric fields of 1.0 kV mm−1 as well as 1.5 kV mm−1. The transient stress tended to approach to a steady stress depending on the electric field strength although the steady shear stress could not be necessarily measured by the sliding rheometer which limited the maximum shear strain. The maximum shear stress enhanced by the electric fields in the present experiment was in excess of 20 times the steady shear stress under no electric field. The ER response was discussed in terms of the orientation of the PHIC molecules induced by the external electric fields.
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Tanaka, K., Akiyama, R. & Takada, K. Electro-Rheological Response of Anisotropic Solution of Poly(hexyl isocyanate) Measured by Parallel Plates Sliding Rheometer. Polym J 28, 419–423 (1996). https://doi.org/10.1295/polymj.28.419
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DOI: https://doi.org/10.1295/polymj.28.419
