Electrorheological properties of kaolinite, polyindole, and polyindole/kaolinite composite suspensions


Arslan Y., Ünal H. İ., Yilmaz H., Sarı B.

Journal of Applied Polymer Science, vol.104, no.5, pp.3484-3493, 2007 (SCI-Expanded) identifier

  • Publication Type: Article / Article
  • Volume: 104 Issue: 5
  • Publication Date: 2007
  • Doi Number: 10.1002/app.26197
  • Journal Name: Journal of Applied Polymer Science
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.3484-3493
  • Keywords: Electrorheological suspensions, Kaolinite, Polyindole, Polyindole/kaolinite composites
  • Ankara Haci Bayram Veli University Affiliated: No

Abstract

In this study, polyindole (PIN) and polyindole/kaolinite (PIN/KAO) composite were synthesized by free radical polymerization using FeCl3 as an initiator. Average particle sizes (d50) of PIN and PIN/KAO composite were determined by dynamic light scattering (DLS) as 7.2 and 6.2 μm, respectively. The samples were characterized by FTIR, elemental analysis, DSC/TGA and SEM measurements. Suspensions of KAO, PIN, and PIN/KAO composite were prepared in silicone oil (SO) and the sedimentation stabilities were determined. Electrorheological (ER) properties of these suspensions were studied as a function of dispersed phase concentration, shear rate, shear stress, and temperature; and yield stresses and excess shear stresses determined. Further, dielectric properties of KAO, PIN, and PIN/KAO composite were investigated. © 2007 Wiley Periodicals, Inc.