期刊
INTERNATIONAL JOURNAL OF MODERN PHYSICS B
卷 26, 期 2, 页码 -出版社
WORLD SCIENTIFIC PUBL CO PTE LTD
DOI: 10.1142/S0217979212500075
关键词
Electrorheology; rods; polypyrrole; dielectric; steady shear
资金
- Ministry of Education, Youth and Sports of the Czech Republic (MSM) [7088352101]
- Grant Agency of the Czech Republic [202/09/1626]
- European Regional Development Fund (ERDF)
- Centre of Polymer Systems [CZ.1.05/2.1.00/03.0111]
In this paper, we study the preparation of titanate/polypyrrole core-shell rod-like composite particles. The mere titanate rod-like particles were prepared as core material and PPy was polymerized on their surface in different amounts. Rheological measurements showed that under an applied external electric field, shear stress of these materials significantly increased with amount of PPy in the shell layer. The yield stresses obtained from the Cho-Choi-Jhon model were correlated with dielectric properties of suspensions. Polarizability as a measure of particle polarization obtained from Havriliak-Negami model of dielectric spectra increases with the content of PPy in the samples. Furthermore, role of particle concentration and silicone oil viscosity was also investigated.
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