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Electrorheological performances of poly(o-toluidine) and p-toluenesulfonic acid doped poly(o-toluidine) suspensions

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Abstract

Poly(o-toluidine) (POT) and p-toluenesulfonic acid doped poly(o-toluidine) (TSA-POT) were synthesized via chemical oxidation and emulsion polymerization, respectively. The rheological measurements of the dedoped POT and TSA-POT silicone oil suspensions showed that both of the suspensions exhibited electrorheological (ER) effect under electric field. The analyses of the rheological curves of suspension indicated that POT and TSA-POT suspensions presented different flow behaviors. POT suspensions presented fast polarization under external electric field with the existence of critical shear rates (γ crit), and POT suspensions behaved well with Bingham model above γ crit TSA-POT suspension behaved very well with Cho–Choi–Jhon model in all shear rate regions. Both of static and dynamic yield stresses for POT and TSA-POT suspensions in electric field were proportional to the square of electric field strength. The different ER performances between POT and TSA-POT suspensions were explained based on the conductivity and dielectric constant of the particles. The modification of conductivity and dielectric constant by doping POT with TSA improved the ER performance of TSA-POT suspension.

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Authors and Affiliations

  1. Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education, College of Chemistry, Xiangtan University, Xiangtan, 411105, People’s Republic of China

    Jing Liu, Xiaohong Wen, Zhanpeng Liu, Yi Tan & Shuangyan Yang

  2. College of Civil Engineering and Mechanics, Xiangtan University, Xiangtan, 411105, People’s Republic of China

    Zhanpeng Liu & Ping Zhang

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  1. Jing Liu
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  2. Xiaohong Wen
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  3. Zhanpeng Liu
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  4. Yi Tan
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  5. Shuangyan Yang
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  6. Ping Zhang
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Correspondence to Zhanpeng Liu or Ping Zhang.

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Liu, J., Wen, X., Liu, Z. et al. Electrorheological performances of poly(o-toluidine) and p-toluenesulfonic acid doped poly(o-toluidine) suspensions. Colloid Polym Sci 293, 1391–1400 (2015). https://doi.org/10.1007/s00396-015-3523-x

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  • DOI: https://doi.org/10.1007/s00396-015-3523-x

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