Electrorheological properties of kaolinite, polyindole, and polyindole/kaolinite composite suspensions
✍ Scribed by Yasin Arslan; Halil Ibrahim Unal; Hasim Yilmaz; Bekir Sari
- Publisher
- John Wiley and Sons
- Year
- 2007
- Tongue
- English
- Weight
- 365 KB
- Volume
- 104
- Category
- Article
- ISSN
- 0021-8995
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✦ Synopsis
Abstract
In this study, polyindole (PIN) and polyindole/kaolinite (PIN/KAO) composite were synthesized by free radical polymerization using FeCl~3~ 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 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. J Appl Polym Sci, 2007