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Electrorheology of aniline oligomers

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dc.title Electrorheology of aniline oligomers en
dc.contributor.author Mrlík, Miroslav
dc.contributor.author Sedlačík, Michal
dc.contributor.author Pavlínek, Vladimír
dc.contributor.author Bober, Patrycja
dc.contributor.author Trchová, Miroslava
dc.contributor.author Stejskal, Jaroslav
dc.contributor.author Sáha, Petr
dc.relation.ispartof Colloid and Polymer Science
dc.identifier.issn 0303-402X Scopus Sources, Sherpa/RoMEO, JCR
dc.date.issued 2013
utb.relation.volume 291
utb.relation.issue 9
dc.citation.spage 2079
dc.citation.epage 2086
dc.type article
dc.language.iso en
dc.publisher Springer-Verlag en
dc.identifier.doi 10.1007/s00396-013-2947-4
dc.relation.uri https://link.springer.com/article/10.1007/s00396-013-2947-4
dc.subject Aniline oligomers en
dc.subject Dielectric properties en
dc.subject Electrorheology en
dc.subject Polyaniline en
dc.subject Steady shear en
dc.description.abstract Aniline oligomers were prepared by the oxidation of aniline with p-benzoquinone in aqueous solutions of methanesulfonic acid (MSA) of various concentrations. Their molecular structures were assessed by Fourier transform infrared spectroscopy. The electrorheological (ER) behavior of their silicone oil suspensions under applied electric field has been investigated. Shear stress at a low shear rate, τ 0.9, was used as a criterion of the rigidity of internal structures created by the application of an electric field. It was established from the fitting of the dielectric spectra of the suspensions with the Havriliak-Negami model that dielectric relaxation strength, as a degree of polarization induced by an external field contributing to the enhanced ER effect, increases and relaxation time, i.e., the response of the particle to the application of the field, decreases when a higher molar concentration of MSA is used. The best values were observed for suspensions of the sample prepared in the presence of 0.5 M of MSA. This suspension creates stiff internal structures under an applied electric field strength of 2 kV mm-1 with τ 0.9 of nearly 50 Pa, which is even slightly of higher value than that obtained for standard polyaniline base ER suspension measured at the same conditions. The concentration of the MSA used in the preparation of oligomers seems to be a crucial factor influencing the conductivity, dielectric properties and, consequently, rheological behavior, and finally ER activity of their suspensions. © 2013 Springer-Verlag Berlin Heidelberg. en
utb.faculty Faculty of Technology
dc.identifier.uri http://hdl.handle.net/10563/1003465
utb.identifier.obdid 43870201
utb.identifier.scopus 2-s2.0-84882333973
utb.identifier.wok 000323248000005
utb.identifier.coden CPMSB
utb.source j-scopus
dc.date.accessioned 2013-09-20T08:46:43Z
dc.date.available 2013-09-20T08:46:43Z
utb.contributor.internalauthor Mrlík, Miroslav
utb.contributor.internalauthor Sedlačík, Michal
utb.contributor.internalauthor Pavlínek, Vladimír
utb.contributor.internalauthor Sáha, Petr
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