Structure-property relationships in novel poly(imide-amide)-poly(ethylene glycol) hybrid networks

Kripotou, S; Pissis, P; Sysel, P; Sindelar, V; Bershtein, VA

dc.contributor.author	Kripotou, S	en
dc.contributor.author	Pissis, P	en
dc.contributor.author	Sysel, P	en
dc.contributor.author	Sindelar, V	en
dc.contributor.author	Bershtein, VA	en
dc.date.accessioned	2014-03-01T01:25:12Z
dc.date.available	2014-03-01T01:25:12Z
dc.date.issued	2006	en
dc.identifier.issn	0032-3861	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/17597
dc.subject	Dielectric techniques	en
dc.subject	Hybrid polymer networks	en
dc.subject	Molecular mobility	en
dc.subject.classification	Polymer Science	en
dc.subject.other	Crystallization	en
dc.subject.other	Dielectric relaxation	en
dc.subject.other	Differential scanning calorimetry	en
dc.subject.other	Glass transition	en
dc.subject.other	Morphology	en
dc.subject.other	Spectroscopic analysis	en
dc.subject.other	Dielectric relaxation spectroscopy (DRS)	en
dc.subject.other	Dielectric techniques	en
dc.subject.other	Hybrid polymer networks	en
dc.subject.other	Molecular mobility	en
dc.subject.other	Thermally stimulated depolarization currents (TSDC)	en
dc.subject.other	Polyethylene glycols	en
dc.subject.other	polymer science	en
dc.title	Structure-property relationships in novel poly(imide-amide)-poly(ethylene glycol) hybrid networks	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.polymer.2005.11.012	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.polymer.2005.11.012	en
heal.language	English	en
heal.publicationDate	2006	en
heal.abstract	Broadband dielectric relaxation spectroscopy (DRS), thermally stimulated depolarisation currents (TSDC), differential scanning calorimetry (DSC) and to a lesser extent water uptake measurements, were employed to investigate molecular mobility, morphology and crystallization/melting events of PEG in poly(imide-amide)-polyethylene glycol hybrid networks (PIA-PEG) with short (M-n = 1000 g/mol) and long (M-n. = 3400 g/mol) PEG crosslinks. The results obtained suggest long range connectivity of the PEG component in the hybrids with short PEG crosslinks at PEG content higher than 40 wt% and in these with long PEG crosslinks at PEG content higher that] 20 wt%. Crystallization of the PEG component is observed by DSC in the hybrids with the longer crosslinks at sufficiently high content of PEG, only, The glass transition temperature, T-g, of PEG component in the hybrids with the shorter PEG crosslinks is shifted to higher temperatures compared to that of the hybrids with longer PEG crosslinks, while suppression of the glass transition of the PEG component is observed in the hybrids with the shorter PEG crosslinks at PEG content lower than 40 wt%. The results are discussed in terms of constraints to segmental motion of the PEG crosslinks, imposed by fixed PEG chain ends on the rigid PI chains. (c) 2005 Elsevier Ltd. All rights reserved.	en
heal.publisher	ELSEVIER SCI LTD	en
heal.journalName	Polymer	en
dc.identifier.doi	10.1016/j.polymer.2005.11.012	en
dc.identifier.isi	ISI:000234617600047	en
dc.identifier.volume	47	en
dc.identifier.issue	1	en
dc.identifier.spage	357	en
dc.identifier.epage	366	en