Molecular mobility and protonic conductivity in polymers: Hydrogels and ionomers

Pissis, P; Kyritsis, A; Shilov, VV

dc.contributor.author	Pissis, P	en
dc.contributor.author	Kyritsis, A	en
dc.contributor.author	Shilov, VV	en
dc.date.accessioned	2014-03-01T01:14:50Z
dc.date.available	2014-03-01T01:14:50Z
dc.date.issued	1999	en
dc.identifier.issn	0167-2738	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/13240
dc.subject	hydrogels	en
dc.subject	ionomers	en
dc.subject	microphase separation	en
dc.subject	ionic aggregation	en
dc.subject	fragility	en
dc.subject.classification	Chemistry, Physical	en
dc.subject.classification	Physics, Condensed Matter	en
dc.subject.other	Agglomeration	en
dc.subject.other	Dielectric relaxation	en
dc.subject.other	Electric conductivity	en
dc.subject.other	Hydrogels	en
dc.subject.other	Ionomers	en
dc.subject.other	Molecular dynamics	en
dc.subject.other	Phase separation	en
dc.subject.other	Polyethylene oxides	en
dc.subject.other	Polyurethanes	en
dc.subject.other	Protons	en
dc.subject.other	Spectroscopic analysis	en
dc.subject.other	Thermal effects	en
dc.subject.other	Dielectric relaxation spectroscopy (DRS)	en
dc.subject.other	Microphase separation	en
dc.subject.other	Protonic conductors	en
dc.subject.other	Thermally stimulated depolarization currents (TSDC) techniques	en
dc.subject.other	Conductive materials	en
dc.title	Molecular mobility and protonic conductivity in polymers: Hydrogels and ionomers	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/S0167-2738(99)00177-0	en
heal.identifier.secondary	http://dx.doi.org/10.1016/S0167-2738(99)00177-0	en
heal.language	English	en
heal.publicationDate	1999	en
heal.abstract	Dielectric relaxation spectroscopy (DRS) in wide ranges of frequency (10(-2)-10(10) Hz) and temperature (170-350 K) and thermally stimulated depolarization currents (TSDC) techniques (77-300 K) were employed to study protonic conductivity and molecular mobility in poly(ethylene ride) (PEO) hydrogels and in novel segmented polyurethane ionomers. High protonic DC conductivity values are obtained with both systems. In the hydrogels the results are discussed in terms of polymer-water interactions, and of temperature- and water-induced effects. In the ionomers additional information on microphase separation and ionic aggregation obtained by means of DSC, WAXS, SAXS and DMTA measurements provides a basis for discussing structure-property relationships in this class of materials. Proton conductivity in both systems is governed by the motion of the polymeric chains. In the ionomers DC conductivity increases with decreasing hard segment content, suggesting that proton motion occurs through the soft segments phase (C) 1999 Elsevier Science B.V. All rights reserved.	en
heal.publisher	Elsevier Science Publishers B.V., Amsterdam, Netherlands	en
heal.journalName	Solid State Ionics	en
dc.identifier.doi	10.1016/S0167-2738(99)00177-0	en
dc.identifier.isi	ISI:000083122700026	en
dc.identifier.volume	125	en
dc.identifier.issue	1	en
dc.identifier.spage	203	en
dc.identifier.epage	212	en