Abstract
The electrorheological (ER) behavior of polypyrrole (PPy)–SBS composite suspensions was investigated. The PPy–SBS composites were prepared to improve mechanical and electrical properties, and thereby enhance the ER response of their suspensions. Various PPy–SBS composites were synthesized by emulsion polymerization controlling the amount of SBS. The ER response initially decreased and then increased with increasing amount of SBS. The dielectric constant and conductivity of the PPy–SBS composite particles and the dielectric constant of the PPy–SBS composite suspensions were not consistent with the ER behavior, but the particle size did. A power-law dependence, τ = 0.207 βd 2 E 3/2, shows a good fit to the ER behavior of PPy–SBS composite suspensions with various amounts of SBS. The dependence of E 1.5 is consistent with the conduction model and the dependence of d 2 is consistent with the polarization model, but the dependence of β is not consistent with the either model. A surfactant, Brij ®30, was added to the PPy–SBS composite suspension to reduce the non-linear conduction and thereby enhance the ER response. It was observed that the ER response was enhanced by adding the surfactant.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.