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Electrorheological properties of kaolinite, polyindole, and polyindole/kaolinite composite suspensions
Author(s) -
Arslan Yasin,
Ibrahim Unal Halil,
Yilmaz Hasim,
Sari Bekir
Publication year - 2007
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.26197
Subject(s) - materials science , composite number , silicone oil , electrorheological fluid , kaolinite , dynamic light scattering , polymerization , composite material , shear rate , polymer chemistry , polymer , rheology , nanoparticle , nanotechnology , electric field , physics , quantum mechanics , metallurgy
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