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The observation of a conductivity threshold on the electrorheological effect of p-phenylenediamine oxidized with p-benzoquinone

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dc.title The observation of a conductivity threshold on the electrorheological effect of p-phenylenediamine oxidized with p-benzoquinone en
dc.contributor.author Plachý, Tomáš
dc.contributor.author Sedlačík, Michal
dc.contributor.author Pavlínek, Vladimír
dc.contributor.author Stejskal, Jaroslav
dc.relation.ispartof Journal of Materials Chemistry C
dc.identifier.issn 2050-7534 Scopus Sources, Sherpa/RoMEO, JCR
dc.identifier.issn 2050-7526 Scopus Sources, Sherpa/RoMEO, JCR
dc.date.issued 2015
utb.relation.volume 3
utb.relation.issue 38
dc.citation.spage 9973
dc.citation.epage 9980
dc.type article
dc.language.iso en
dc.publisher Royal Society of Chemistry (RSC)
dc.identifier.doi 10.1039/c5tc02119g
dc.relation.uri http://pubs.rsc.org/en/Content/ArticleLanding/2015/TC/C5TC02119G#!divAbstract
dc.description.abstract p-Phenylenediamine was oxidized with p-benzoquinone in the presence of 0.1-5 M methanesulfonic acid (MSA) solutions. The resulting methanesulfonate salts of 2,5-(di-p-phenylenediamine)-1,4-benzoquinone are semiconducting and the particles were further suspended in silicone oil in a weight ratio of 1 : 9 in order to create novel electrorheological fluids. Conductivity measurements using the two-point method along with dielectric spectroscopy were carried out in order to investigate their electrical and dielectric properties, including their silicone-oil suspensions. The higher the concentration of MSA was present during the synthesis, the higher the conductivity was observed. Nevertheless, a certain threshold of the ER effect has been found and a further significant increase in conductivity causes only a slight ER effect enhancement. At an electric field strength of 1.5 kV mm-1, the observed yield stresses read at the low shear rate values were 11.5 Pa, 20.3 Pa, 24.5 Pa, and 28.2 Pa for particles with conductivities 1.5 × 10-12, 8.5 × 10-11, 1.0 × 10-8, and 1.5 × 10-7 S cm-1, respectively. From dielectric spectra, it was observed that the conductivity of the particles determines the relaxation times of their silicone-oil suspensions. This journal is © The Royal Society of Chemistry. en
utb.faculty University Institute
utb.faculty Faculty of Technology
dc.identifier.uri http://hdl.handle.net/10563/1005694
utb.identifier.rivid RIV/70883521:28610/15:43873181!RIV16-MSM-28610___
utb.identifier.obdid 43873612
utb.identifier.scopus 2-s2.0-84942474951
utb.identifier.wok 000361835600026
utb.identifier.coden JMCCC
utb.source j-wok
dc.date.accessioned 2015-11-05T11:27:35Z
dc.date.available 2015-11-05T11:27:35Z
dc.description.sponsorship P205/12/0911, GACR, Czech Science Foundation
dc.description.sponsorship Internal Grant Agency of Tomas Bata University [IGA/CPS/2015/007]; Ministry of Education, Youth and Sports of the Czech Republic - Program NPU I [LO1504]; Czech Science Foundation [P205/12/0911]
dc.rights Attribution-NonCommercial-NoDerivs 3.0 Unported
dc.rights.uri https://creativecommons.org/licenses/by-nc-nd/3.0/
dc.rights.access openAccess
utb.ou Centre of Polymer Systems
utb.contributor.internalauthor Plachý, Tomáš
utb.contributor.internalauthor Sedlačík, Michal
utb.contributor.internalauthor Pavlínek, Vladimír
utb.fulltext.affiliation Tomas Plachy a,b, Michal Sedlacik *a, Vladimir Pavlinek a, Jaroslav Stejskal c a Centre of Polymer Systems, University Institute, Tomas Bata University in Zlin, T. Bata Ave. 5678, 760 01 Zlin, Czech Republic. E-mail: msedlacik@cps.utb.cz b Polymer Centre, Faculty of Technology, Tomas Bata University in Zlin, T. G. Masaryk Sq. 275, 762 72 Zlin, Czech Republic c Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovsky Sq. 2, 162 06 Prague 6, Czech Republic
utb.fulltext.dates Received 14th July 2015 Accepted 3rd September 2015
utb.fulltext.faculty University Institute
utb.fulltext.faculty Faculty of Technology
utb.fulltext.faculty University Institute
utb.fulltext.faculty University Institute
utb.fulltext.ou Centre of Polymer Systems
utb.fulltext.ou Polymer Centre
utb.fulltext.ou Centre of Polymer Systems
utb.fulltext.ou Centre of Polymer Systems
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