Electrorheological characteristics of polyaniline and its copolymer suspensions with ionic and nonionic substituents |
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| Authors: | M S Cho J W Kim H J Choi R M Webber M S Jhon |
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| Institution: | (1) Department of Polymer Science and Engineering, Inha University Inchon 402-751 Korea e-mail: hjchoi@inha.ac.kr, KR;(2) The Lubrizol Co., 29400 Lakeland Boulevard, Wickliffe, OH 44092, USA, US;(3) Department of Chemical Engineering Carnegie Mellon University, Pittsburgh PA 15213, USA, US |
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| Abstract: | Electrorheological (ER) characteristics of ER fluids, composed of suspensions of semiconducting polyaniline and two different
copolyaniline particles in silicone oil, were determined experimentally. Ionic sodium diphenylamine sulfonate and nonionic
o-ethoxyaniline were used to synthesize copolyanilines, i.e. N-substituted copolyaniline and poly(aniline-co-o-ethoxyaniline), respectively. ER fluids composed of these three different polymers were compared with respect to their rheological
properties under an applied electric field. It was found that ER fluids containing a copolymer with an ionic group exhibited
the highest ER performance among polyaniline and its copolymer systems in a shear-rate region above 1 s−1.
Received: 22 February 1999 /Accepted in revised form: 25 August 1999 |
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| Keywords: | Electrorheological fluid N-substituted copolyaniline Polyaniline Poly(aniline-co-o-ethoxyaniline) |
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