Phase morphology and molecular dynamics of a polyurethane ionomer reinforced with a liquid crystalline filler

Charnetskaya, AG; Polizos, G; Shtompel, VI; Privalko, EG; Kercha, YuYu; Pissis, P

dc.contributor.author	Charnetskaya, AG	en
dc.contributor.author	Polizos, G	en
dc.contributor.author	Shtompel, VI	en
dc.contributor.author	Privalko, EG	en
dc.contributor.author	Kercha, YuYu	en
dc.contributor.author	Pissis, P	en
dc.date.accessioned	2014-03-01T01:19:25Z
dc.date.available	2014-03-01T01:19:25Z
dc.date.issued	2003	en
dc.identifier.issn	0014-3057	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/15481
dc.subject	Dielectric relaxation	en
dc.subject	Liquid crystalline/polyurethane ionomer composties	en
dc.subject	Microphase separation	en
dc.subject	Molecular mobility	en
dc.subject.classification	Polymer Science	en
dc.subject.other	Agglomeration	en
dc.subject.other	Composite materials	en
dc.subject.other	Crystallization	en
dc.subject.other	Dielectric relaxation	en
dc.subject.other	Differential scanning calorimetry	en
dc.subject.other	Electric conductivity	en
dc.subject.other	Interfaces (materials)	en
dc.subject.other	Ionomers	en
dc.subject.other	Liquid crystal polymers	en
dc.subject.other	Molecular dynamics	en
dc.subject.other	Phase separation	en
dc.subject.other	Polymer blends	en
dc.subject.other	Spectroscopy	en
dc.subject.other	X ray scattering	en
dc.subject.other	Molecular mobility	en
dc.subject.other	Polyurethanes	en
dc.title	Phase morphology and molecular dynamics of a polyurethane ionomer reinforced with a liquid crystalline filler	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/S0014-3057(03)00136-8	en
heal.identifier.secondary	http://dx.doi.org/10.1016/S0014-3057(03)00136-8	en
heal.language	English	en
heal.publicationDate	2003	en
heal.abstract	Solution-blended binary composites of ionic segmented polyurethane (SPU-I) and liquid crystalline oligonter (LCO) were characterized by wide-angle (WAXS) and small-angle (SAXS) X-ray scattering, differential scanning calorimetry (DSC), thermally stimulated depolarization currents (TSDC) and dielectric relaxation spectroscopy (DRS). Both components mutually influenced their states of aggregation in blends (most significantly, promoting smearing-out of interfaces between stiff and soft chain fragments of SPU-I into broad interfacial regions of intermediate composition). Apparently, the blend with w = 0.10 happened to be most favorable for crystallization of the LCO, while the degree of microphase separation for SPU-I became lower and the distribution of stiff domains by sizes became broader, the higher the LCO content. The overall molecular mobility of SPU-I in blends was significantly reduced. This reduction included the intensity of the secondary and the primary relaxations, and of the interfacial Maxwell-Wagner-Sillars (MWS) relaxation, whereas the transition temperatures remained essentially composition-invariant. The Arrhenius-like behavior for the dc conductivity concomitant to the non-Arrhenius (i.e., Vogel-Tammann-Fulcher) frequency dependence for the a relaxation in blends suggested a decoupling of conductivity from the motion of the SPU-I soft chain segments. (C) 2003 Elsevier Ltd. All rights reserved.	en
heal.publisher	PERGAMON-ELSEVIER SCIENCE LTD	en
heal.journalName	European Polymer Journal	en
dc.identifier.doi	10.1016/S0014-3057(03)00136-8	en
dc.identifier.isi	ISI:000186676500012	en
dc.identifier.volume	39	en
dc.identifier.issue	11	en
dc.identifier.spage	2167	en
dc.identifier.epage	2174	en