Dielectric relaxation of polystyrene doped with polar DR1 molecules

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dc.contributor.authorFedosov, S. N.
dc.contributor.authorSergeeva, A. E.
dc.contributor.authorSoloshenko, Viktor I.
dc.contributor.authorButenko, A. F.
dc.date.accessioned2018-06-06T06:38:16Z
dc.date.available2018-06-06T06:38:16Z
dc.date.issued2004
dc.description.abstractFour relaxation processes identified in polystyrene containing 2 wt % of DR1 chromophore were studied by the dielectric spectroscopy in the frequency range from 1 Hz to 1 MHz at constant temperatures from 30 to 130 °С and by thermally stimulated depolarization current measurements at sub-zero temperatures down to —160 °С. Hamon’s transformation of isothermal depolarization currents were also performed to give information on dielectric relaxation at infra-low frequencies. It has been found that distribution of relaxation times related to a relaxation becomes wider due to presence of dye molecules, while both the dielectric constant and the dielectric strength increase. Considerable narrowing of the loss peak was observed with increase of temperature indicating that the PS/DRI system is not the thermoreologically simple one and temperature-time superposition principle is not applicable above glass transition where the temperature dependence of the relaxation time obeys Williams—Landel—Ferry law. It has been found that Arrenius law is valid below glass transition.uk
dc.identifierUDC 678.01:537.226
dc.identifier.citationФотоэлектроника = Photoelectronicsuk
dc.identifier.urihttps://dspace.onu.edu.ua/handle/123456789/16605
dc.language.isoenuk
dc.publisherОдеський національний університет імені І. І. Мечниковаuk
dc.relation.ispartofseries;Вип. 13.
dc.subjectspectroscopyuk
dc.subjectchromophoreuk
dc.subjectrelaxationuk
dc.subjecttemperatureuk
dc.titleDielectric relaxation of polystyrene doped with polar DR1 moleculesuk
dc.typeArticleuk
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Photoelectronics