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

Arslan Y., Unal H. I. , Yilmaz H., Sari B.

JOURNAL OF APPLIED POLYMER SCIENCE, vol.104, no.5, pp.3484-3493, 2007 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 104 Issue: 5
  • Publication Date: 2007
  • Doi Number: 10.1002/app.26197
  • Page Numbers: pp.3484-3493
  • Keywords: kaolinite, polyindole, polyindole/kaolinite composites, electrorheological suspensions, METHACRYLATE)-CO-POLY(4-VINYL PYRIDINE), POLYANILINE SUSPENSIONS, SILICONE OIL, FLUID, METHACRYLATE), PARTICLES, COPOLYMER, BLOCK, WATER, FIELD


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 (d(50)) of PIN and PIN/KAO composite were determined by dynamic light scattering (DLS) as 7.2 and 6.2 mu m, 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. (c) 2007 Wiley Periodicals, Inc. J Appl Polym Sci 104: 3484-3493, 2007.