Relaxation phenomena and morphology in polymer blends based on polyurethanes investigated by various thermal analysis techniques

Vatalis, AS; Kanapitsas, A; Delides, CG; Pissis, P

dc.contributor.author	Vatalis, AS	en
dc.contributor.author	Kanapitsas, A	en
dc.contributor.author	Delides, CG	en
dc.contributor.author	Pissis, P	en
dc.date.accessioned	2014-03-01T01:17:00Z
dc.date.available	2014-03-01T01:17:00Z
dc.date.issued	2001	en
dc.identifier.issn	0040-6031	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/14323
dc.subject	Branched polymer polyol	en
dc.subject	Microphase separation	en
dc.subject	Polymer blends	en
dc.subject	Polyurethane	en
dc.subject	Styrene-acrylonitrile copolymer	en
dc.subject.classification	Chemistry, Analytical	en
dc.subject.classification	Chemistry, Physical	en
dc.subject.other	acetonitrile	en
dc.subject.other	glass	en
dc.subject.other	polymer	en
dc.subject.other	polyurethan	en
dc.subject.other	styrene	en
dc.subject.other	article	en
dc.subject.other	conductance	en
dc.subject.other	differential scanning calorimetry	en
dc.subject.other	molecular dynamics	en
dc.subject.other	phase separation	en
dc.subject.other	temperature dependence	en
dc.subject.other	thermal analysis	en
dc.title	Relaxation phenomena and morphology in polymer blends based on polyurethanes investigated by various thermal analysis techniques	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/S0040-6031(01)00430-0	en
heal.identifier.secondary	http://dx.doi.org/10.1016/S0040-6031(01)00430-0	en
heal.language	English	en
heal.publicationDate	2001	en
heal.abstract	The thermal, thermomechanical and thermal-dielectric properties of polyurethane blends based on branched polymer polyol (PUR) and styrene-acrylonitrile (SAN) copolymer were studied by differential scanning calorimetry (DSC), thermomechanical analysis (TMA), thermally stimulated depolarization currents (TSDC) techniques and dielectric relaxation spectroscopy (DRS). Several molecular mobility mechanisms associated with secondary local relaxations, primary (main) relaxations due to the dynamic glass transition and conductivity effects were observed and studied in detail. The use of several molecular mobility techniques, characterized by various spatial and time scales, allowed for several intercomparisons, in particular with respect to the determination of glass transition temperatures and of the temperature dependence of relaxation times which indicate the advantages and the limits of each particular technique. The results by the different techniques suggests in agreement to each other, that on addition of SAN the microphase separation between hard segment (HS) microdomains and soft segment (SS) microphase of PUR is improved. (C) 2001 Elsevier Science B.V. All rights reserved.	en
heal.publisher	ELSEVIER SCIENCE BV	en
heal.journalName	Thermochimica Acta	en
dc.identifier.doi	10.1016/S0040-6031(01)00430-0	en
dc.identifier.isi	ISI:000168764900005	en
dc.identifier.volume	372	en
dc.identifier.issue	1-2	en
dc.identifier.spage	33	en
dc.identifier.epage	38	en