Microphase separation in ion-containing polyurethanes studied by dielectric measurements

Tsonos, C; Apekis, L; Zois, C; Tsonos, G

dc.contributor.author	Tsonos, C	en
dc.contributor.author	Apekis, L	en
dc.contributor.author	Zois, C	en
dc.contributor.author	Tsonos, G	en
dc.date.accessioned	2014-03-01T01:21:02Z
dc.date.available	2014-03-01T01:21:02Z
dc.date.issued	2004	en
dc.identifier.issn	1359-6454	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/16046
dc.subject	Fragility	en
dc.subject	Ion-containing polyurethanes	en
dc.subject	Microphase separation	en
dc.subject	MWS interfacial polarization	en
dc.subject.classification	Materials Science, Multidisciplinary	en
dc.subject.classification	Metallurgy & Metallurgical Engineering	en
dc.subject.other	Dielectric relaxation	en
dc.subject.other	Differential scanning calorimetry	en
dc.subject.other	Ionomers	en
dc.subject.other	Mixtures	en
dc.subject.other	Molecular structure	en
dc.subject.other	Molecular weight	en
dc.subject.other	Polymer blends	en
dc.subject.other	Spectroscopic analysis	en
dc.subject.other	Thermoplastic elastomers	en
dc.subject.other	Dielectric relaxation spectroscopy (DRS)	en
dc.subject.other	Thermally stimulated depolarization currents (TSDC)	en
dc.subject.other	Polyurethanes	en
dc.title	Microphase separation in ion-containing polyurethanes studied by dielectric measurements	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.actamat.2003.11.015	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.actamat.2003.11.015	en
heal.language	English	en
heal.publicationDate	2004	en
heal.abstract	Ac dielectric relaxation measurements, thermally stimulated depolarization currents (TSDC) measurements, and differential scanning calorimetry (DSC) measurements, were employed to investigate the dielectric properties in relation to the microphase separation in blends of an anion containing polyurethane (PU1) and polyaminourethane (PU2). The temperature at which alpha- and Maxwell-Wagner-Sillars relaxation appear in the TSDC plots and the magnitude of these relaxations are strongly affected by the degree of microphase separation (DMS) of the ionomer blends. The results, of the various techniques, were compared to each other with respect to their characteristic, and indicate that the DMS decreases on addition of the pure component PU2 to the blends. Analysis of the alpha-relaxation, in terms of fragility, indicates that the systems under investigation are fragile. Results indicate a correlation between fragility and DMS. Lower phase mixing suggests higher fragility. (C) 2003 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.	en
heal.publisher	PERGAMON-ELSEVIER SCIENCE LTD	en
heal.journalName	Acta Materialia	en
dc.identifier.doi	10.1016/j.actamat.2003.11.015	en
dc.identifier.isi	ISI:000220236100024	en
dc.identifier.volume	52	en
dc.identifier.issue	5	en
dc.identifier.spage	1319	en
dc.identifier.epage	1326	en