Structure-property relationships in proton conductors based on polyurethanes

Pissis, P; Kyritsis, A; Georgoussis, G; Shilov, VV; Shevchenko, VV

dc.contributor.author	Pissis, P	en
dc.contributor.author	Kyritsis, A	en
dc.contributor.author	Georgoussis, G	en
dc.contributor.author	Shilov, VV	en
dc.contributor.author	Shevchenko, VV	en
dc.date.accessioned	2014-03-01T01:15:54Z
dc.date.available	2014-03-01T01:15:54Z
dc.date.issued	2000	en
dc.identifier.issn	0167-2738	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/13810
dc.subject	polyurethanes	en
dc.subject	microphase separation	en
dc.subject	segmental relaxation	en
dc.subject	protonic conductivity	en
dc.subject	decoupling	en
dc.subject.classification	Chemistry, Physical	en
dc.subject.classification	Physics, Condensed Matter	en
dc.subject.other	POLYMER ELECTROLYTES	en
dc.subject.other	PHASE MORPHOLOGY	en
dc.subject.other	CONDUCTIVITY	en
dc.subject.other	IONOMERS	en
dc.subject.other	HYDROGELS	en
dc.title	Structure-property relationships in proton conductors based on polyurethanes	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/S0167-2738(00)00318-0	en
heal.identifier.secondary	http://dx.doi.org/10.1016/S0167-2738(00)00318-0	en
heal.language	English	en
heal.publicationDate	2000	en
heal.abstract	Novel proton-conducting polyurethanes based on poly(tetramethylene glycol), with the protons being incorporated in the flexible soft segments, were prepared and their structure-property relationships were investigated. The structure: and the morphology were studied by means of differential scanning calorimetry (DSC), and wide- and small-angle X-ray scattering (WAXS and SAXS). Molecular mobility and proton conductivity were measured by means of broadband dielectric relaxation spectroscopy (DRS, 10(-2)-10(9) Hz) and of thermally stimulated depolarisation currents techniques (TSDC, 77-300 K). Dc conductivity values, sigma (dc), determined from ac conductivity and from complex impedance plots, are of the order of 10(-5) S/m at 50 degreesC, and decrease with increasing hard segment content of the polyurethanes. Their temperature dependence is described by Vogel-Tammann-Fulcher-Hesse (VTFH), suggesting that the conductivity mechanism is governed by the motion of the polymeric chains. (C) 2000 Elsevier Science B.V. All rights reserved.	en
heal.publisher	ELSEVIER SCIENCE BV	en
heal.journalName	SOLID STATE IONICS	en
dc.identifier.doi	10.1016/S0167-2738(00)00318-0	en
dc.identifier.isi	ISI:000165996600036	en
dc.identifier.volume	136	en
dc.identifier.spage	255	en
dc.identifier.epage	260	en