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Electrorheological properties and creep behavior of polyindole/poly(vinyl acetate) composite suspensions

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Abstract

In this study, electrorheological (ER) properties of polyindole (PIN) and polyindole/poly (vinyl acetate), (PIN/PVAc) conducting composites having different compositions were investigated. Conductivities and dielectric properties of these composites were determined. The particle sizes of the composites were determined by dynamic light scattering method. Suspensions of PIN and PIN/PVAc composites were prepared in silicone oil, at several concentrations (c = 5–25%, m/m) and their sedimentation stabilities were determined. Then the effects of dispersed particle concentration, shear rate, electric field strength, frequency, and temperature onto ER activities of suspensions were investigated. The flow times of these suspensions at various dc electric field strengths were measured. Further, creep tests were applied to the composite suspensions and a reversible viscoelastic deformation was observed.

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Acknowledgement

We are grateful to the Gazi University Research Fund (Grant No: 2006-45) for the financial support of this work.

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Authors and Affiliations

  1. Science Faculty, Chemistry Department, Gazi University, Ankara, Turkey

    Kubra Oz, Halil Ibrahim Unal & Bekir Sari

  2. Science and Arts Faculty, Chemistry Department, Suleyman Demirel University, Isparta, Turkey

    Mustafa Yavuz

  3. Science and Arts Faculty, Chemistry Department, Harran University, Sanliurfa, Turkey

    Hasim Yilmaz

Authors
  1. Kubra Oz
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  2. Mustafa Yavuz
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  3. Hasim Yilmaz
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  4. Halil Ibrahim Unal
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  5. Bekir Sari
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Correspondence to Halil Ibrahim Unal.

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Oz, K., Yavuz, M., Yilmaz, H. et al. Electrorheological properties and creep behavior of polyindole/poly(vinyl acetate) composite suspensions. J Mater Sci 43, 1451–1459 (2008). https://doi.org/10.1007/s10853-007-2319-x

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  • DOI: https://doi.org/10.1007/s10853-007-2319-x

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