Electrorheological properties and creep behavior of polyindole/poly(vinyl acetate) composite suspensions |
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| Authors: | Kubra Oz Mustafa Yavuz Hasim Yilmaz Halil Ibrahim Unal Bekir Sari |
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| Affiliation: | (1) Science Faculty, Chemistry Department, Gazi University, Ankara, Turkey;(2) Science and Arts Faculty, Chemistry Department, Suleyman Demirel University, Isparta, Turkey;(3) Science and Arts Faculty, Chemistry Department, Harran University, Sanliurfa, Turkey |
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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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