Heterogeneity of Segmental Dynamics around Tg and Nanoscale Compositional Inhomogeneity in Polyurethane/ Methacrylate Interpenetrating Networks as Estimated by Creep Rate Spectroscopy

Bershtein, VA; Yakushev, PN; Karabanova, L; Sergeeva, L; Pissis, P

dc.contributor.author	Bershtein, VA	en
dc.contributor.author	Yakushev, PN	en
dc.contributor.author	Karabanova, L	en
dc.contributor.author	Sergeeva, L	en
dc.contributor.author	Pissis, P	en
dc.date.accessioned	2014-03-01T01:14:42Z
dc.date.available	2014-03-01T01:14:42Z
dc.date.issued	1999	en
dc.identifier.issn	0887-6266	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/13190
dc.subject	Β-relaxation	en
dc.subject	Creep rate spectroscopy	en
dc.subject	Glass transition	en
dc.subject	Interpenetrating polymer network	en
dc.subject	Nanoscale inhomogeneity	en
dc.subject	Segmental dynamics heterogeneity	en
dc.subject.classification	Polymer Science	en
dc.subject.other	Composition effects	en
dc.subject.other	Copolymers	en
dc.subject.other	Creep	en
dc.subject.other	Glass transition	en
dc.subject.other	Molecular dynamics	en
dc.subject.other	Polyacrylates	en
dc.subject.other	Polyurethanes	en
dc.subject.other	Relaxation processes	en
dc.subject.other	Spectroscopic analysis	en
dc.subject.other	Creep rate spectroscopy	en
dc.subject.other	Segmental dynamics	en
dc.subject.other	Interpenetrating polymer networks	en
dc.title	Heterogeneity of Segmental Dynamics around Tg and Nanoscale Compositional Inhomogeneity in Polyurethane/ Methacrylate Interpenetrating Networks as Estimated by Creep Rate Spectroscopy	en
heal.type	journalArticle	en
heal.identifier.primary	10.1002/(SICI)1099-0488(19990301)37:5<429::AID-POLB3>3.0.CO;2-E	en
heal.identifier.secondary	http://dx.doi.org/10.1002/(SICI)1099-0488(19990301)37:5<429::AID-POLB3>3.0.CO;2-E	en
heal.language	English	en
heal.publicationDate	1999	en
heal.abstract	Segmental relaxations in a series of poly(propylene oxide)-based polyurethane/butyl methacrylate-triethylene glycol dimethacrylate copolymer interpenetrating networks (IPNs) of various compositions, as compared to those in the pure constituent networks, were studied by an original laser-interferometric Creep Rate Spectroscopy (CRS) technique. The spectra, obtained over the range from 150 K to 360 K, confirmed the CRS superiority in resolution to generally utilized relaxation spectrometry techniques and allowed to characterize in detail the heterogeneity of segmental dynamics within or near the extraordinarily broad glass transition range in these IPNs. Up to eight creep rate peaks have been registered which were shown to be associated just with the predicted kinds of segmental motions, cooperative and partly- or noncooperative; thereby, molecular assignments could be done for these peaks. The relative peak contributions to dynamics around Tg as a function of IPN composition were approximately estimated that provided also some information on nanoscale compositional inhomogeneity of the networks. © 1999 John Wiley & Sons, Inc.	en
heal.publisher	JOHN WILEY & SONS INC	en
heal.journalName	Journal of Polymer Science, Part B: Polymer Physics	en
dc.identifier.doi	10.1002/(SICI)1099-0488(19990301)37:5<429::AID-POLB3>3.0.CO;2-E	en
dc.identifier.isi	ISI:000078670300003	en
dc.identifier.volume	37	en
dc.identifier.issue	5	en
dc.identifier.spage	429	en
dc.identifier.epage	441	en