dc.contributorUniversidade Estadual Paulista (UNESP)
dc.creatorCastillo, J.
dc.creatorChacon, M.
dc.creatorCastillo, R.
dc.creatorVargas, R. A.
dc.creatorBueno, Paulo Roberto
dc.creatorVarela, José Arana
dc.date2014-05-20T15:32:44Z
dc.date2016-10-25T18:09:05Z
dc.date2014-05-20T15:32:44Z
dc.date2016-10-25T18:09:05Z
dc.date2009-10-01
dc.date.accessioned2017-04-06T00:29:23Z
dc.date.available2017-04-06T00:29:23Z
dc.identifierIonics. Heidelberg: Springer Heidelberg, v. 15, n. 5, p. 537-544, 2009.
dc.identifier0947-7047
dc.identifierhttp://hdl.handle.net/11449/41568
dc.identifierhttp://acervodigital.unesp.br/handle/11449/41568
dc.identifier10.1007/s11581-009-0320-x
dc.identifierWOS:000269952300003
dc.identifierhttp://dx.doi.org/10.1007/s11581-009-0320-x
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/884265
dc.descriptionIn the present paper, the ionic conductivity and the dielectric relaxation properties on the poly(vinyl alcohol)-CF(3)COONH(4) polymer system have been investigated by means of impedance spectroscopy measurements over wide ranges of frequencies and temperatures. The electrolyte samples were prepared by solution casting technique. The temperature dependence of the sample's conductivity was modeled by Arrhenius and Vogel-Tammann-Fulcher (VTF) equations. The highest conductivity of the electrolyte of 3.41x10 (-aEuro parts per thousand 3) (Omega cm) (-aEuro parts per thousand 1) was obtained at 423 K. For these polymer system two relaxation processes are revealed in the frequency range and temperature interval of the measurements. One is the glass transition relaxation (alpha-relaxation) of the amorphous region at about 353 K and the other is the relaxation associated with the crystalline region at about 423 K. Dielectric relaxation has been studied using the complex electric modulus formalism. It has been observed that the conductivity relaxation in this polymer system is highly non-exponential. From the electric modulus formalism, it is concluded that the electrical relaxation mechanism is independent of temperature for the two relaxation processes, but is dependent on composition.
dc.languageeng
dc.publisherSpringer Heidelberg
dc.relationIonics
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectPolymer electrolyte
dc.subjectPhase behavior
dc.subjectDielectrical relaxation
dc.titleDielectric relaxation and dc conductivity on the PVOH-CF(3)COONH(4) polymer system
dc.typeOtro


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