Molecular dynamics in hyperbranched polyimides cross-linked with ethylene glycol diglycidyl ether

Maroulas, P; Kripotou, S; Sysel, P; Hobzova, R; Kotek, J; Pissis, P

dc.contributor.author	Maroulas, P	en
dc.contributor.author	Kripotou, S	en
dc.contributor.author	Sysel, P	en
dc.contributor.author	Hobzova, R	en
dc.contributor.author	Kotek, J	en
dc.contributor.author	Pissis, P	en
dc.date.accessioned	2014-03-01T01:24:39Z
dc.date.available	2014-03-01T01:24:39Z
dc.date.issued	2006	en
dc.identifier.issn	0022-3093	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/17378
dc.subject	Dielectric properties	en
dc.subject	Relaxation, electric modulus	en
dc.subject	Thermally stimulated and depolarization current	en
dc.subject.classification	Materials Science, Ceramics	en
dc.subject.classification	Materials Science, Multidisciplinary	en
dc.subject.other	Computer simulation	en
dc.subject.other	Crosslinking	en
dc.subject.other	Dielectric relaxation	en
dc.subject.other	Ethers	en
dc.subject.other	Glass transition	en
dc.subject.other	Molecular dynamics	en
dc.subject.other	Polyethylene glycols	en
dc.subject.other	Spectroscopic analysis	en
dc.subject.other	Broadband dielectric relaxation spectroscopy	en
dc.subject.other	Chain dynamics	en
dc.subject.other	Depolarization currents	en
dc.subject.other	Ethylene glycol diglycidyl ether	en
dc.subject.other	Polyimides	en
dc.title	Molecular dynamics in hyperbranched polyimides cross-linked with ethylene glycol diglycidyl ether	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.jnoncrysol.2006.02.171	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.jnoncrysol.2006.02.171	en
heal.language	English	en
heal.publicationDate	2006	en
heal.abstract	Chain dynamics in hyperbranched polyimides based on 2,4,6-triaminopyrimidine and 4,4'-oxydiphthalic anhydride (molar ratio 1:1) cross-linked with ethylene glycol diglycidyl ether was investigated by means of broadband dielectric relaxation spectroscopy and thermally stimulated depolarization currents techniques. The secondary gamma relaxation increases in magnitude and slows down with increasing degree of cross-linking, whereas the alpha relaxation, associated with the glass transition, becomes faster. These effects were explained in terms of increase of free volume and of constraints to the motion imposed by cross-links. (c) 2006 Elsevier B.V. All rights reserved.	en
heal.publisher	ELSEVIER SCIENCE BV	en
heal.journalName	Journal of Non-Crystalline Solids	en
dc.identifier.doi	10.1016/j.jnoncrysol.2006.02.171	en
dc.identifier.isi	ISI:000242821800070	en
dc.identifier.volume	352	en
dc.identifier.issue	42-49 SPEC. ISS.	en
dc.identifier.spage	4800	en
dc.identifier.epage	4803	en