Polymer-water interactions in poly(hydroxyethyl acrylate) hydrogels studied by dielectric, calorimetric and sorption isotherm measurements

Kyritsis, A; Pissis, P; Ribelles, JLG; Pradas, MM

dc.contributor.author	Kyritsis, A	en
dc.contributor.author	Pissis, P	en
dc.contributor.author	Ribelles, JLG	en
dc.contributor.author	Pradas, MM	en
dc.date.accessioned	2014-03-01T01:11:25Z
dc.date.available	2014-03-01T01:11:25Z
dc.date.issued	1995	en
dc.identifier.issn	0966-7822	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/11628
dc.subject	Dielectric Relaxation	en
dc.subject	Differential Scanning Calorimetry	en
dc.subject	Phase Separation	en
dc.subject	Sorption Isotherm	en
dc.subject	Water Content	en
dc.subject.classification	Polymer Science	en
dc.subject.other	GLASS-TRANSITION TEMPERATURES	en
dc.subject.other	POLY(2-HYDROXYETHYL METHACRYLATE)	en
dc.subject.other	SYNTHETIC HYDROGELS	en
dc.subject.other	LIQUID TRANSITION	en
dc.subject.other	CONDUCTIVITY	en
dc.subject.other	BEHAVIOR	en
dc.subject.other	SYSTEMS	en
dc.title	Polymer-water interactions in poly(hydroxyethyl acrylate) hydrogels studied by dielectric, calorimetric and sorption isotherm measurements	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/0966-7822(94)00009-3	en
heal.identifier.secondary	http://dx.doi.org/10.1016/0966-7822(94)00009-3	en
heal.language	English	en
heal.publicationDate	1995	en
heal.abstract	Poly(hydroxyethyl acrylate) hydrogels with water contents up to 0.96 (g water/g dry material) are studied with equilibrium and dynamic water sorption isotherm measurements, differential scanning calorimetry, thermally stimulated depolarization current measurements and broadband a.c. dielectric relaxation spectroscopy. Our main interest is focused on comparing results on the state of water in the hydrogel obtained with the different techniques on the same sample and on discussing in a quantitative way the relations among the different descriptions imposed by the different techniques. The results show that for water contents lower than about 0.20-0.30 the hydrogel is a homogeneous system in the temperature range down to -100 °C. At higher water contents phase separation occurs. Several critical water contents have been obtained by means of the different techniques used. © 1995.	en
heal.publisher	ELSEVIER SCI LTD	en
heal.journalName	Polymer Gels and Networks	en
dc.identifier.doi	10.1016/0966-7822(94)00009-3	en
dc.identifier.isi	ISI:A1995TN84300004	en
dc.identifier.volume	3	en
dc.identifier.issue	4	en
dc.identifier.spage	445	en
dc.identifier.epage	469	en