Journal of Materials Science

, Volume 43, Issue 4, pp 1451–1459 | Cite as

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

  • Kubra Oz
  • Mustafa Yavuz
  • Hasim Yilmaz
  • Halil Ibrahim UnalEmail author
  • Bekir Sari


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.


Shear Rate Polyaniline Electric Field Strength External Electric Field Polarization Force 



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


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Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  • Kubra Oz
    • 1
  • Mustafa Yavuz
    • 2
  • Hasim Yilmaz
    • 3
  • Halil Ibrahim Unal
    • 1
    Email author
  • Bekir Sari
    • 1
  1. 1.Science Faculty, Chemistry DepartmentGazi UniversityAnkaraTurkey
  2. 2.Science and Arts Faculty, Chemistry DepartmentSuleyman Demirel UniversityIspartaTurkey
  3. 3.Science and Arts Faculty, Chemistry DepartmentHarran UniversitySanliurfaTurkey

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