Dielectric studies of polymer-water interactions and water organization in PEO/water systems

Kyritsis, A; Pissis, P

dc.contributor.author	Kyritsis, A	en
dc.contributor.author	Pissis, P	en
dc.date.accessioned	2014-03-01T01:12:46Z
dc.date.available	2014-03-01T01:12:46Z
dc.date.issued	1997	en
dc.identifier.issn	0887-6266	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/12237
dc.subject	Dielectric relaxation	en
dc.subject	Freezable water	en
dc.subject	PEO/water system	en
dc.subject	Phase separation	en
dc.subject	Plasticization	en
dc.subject	Secondary γ mechanism	en
dc.subject.classification	Polymer Science	en
dc.subject.other	Dielectric relaxation	en
dc.subject.other	Hydration	en
dc.subject.other	Molecules	en
dc.subject.other	Phase separation	en
dc.subject.other	Polyethylene oxides	en
dc.subject.other	Water	en
dc.subject.other	Dielectric relaxation spectroscopy	en
dc.subject.other	Freezable water	en
dc.subject.other	Plasticization	en
dc.subject.other	Polymer water interaction	en
dc.subject.other	Reorientation	en
dc.subject.other	Secondary gamma mechanism	en
dc.subject.other	Thermally stimulated depolarization currents technique	en
dc.subject.other	Water organization	en
dc.subject.other	Polyelectrolytes	en
dc.title	Dielectric studies of polymer-water interactions and water organization in PEO/water systems	en
heal.type	journalArticle	en
heal.identifier.primary	10.1002/(SICI)1099-0488(19970730)35:10<1545::AID-POLB7>3.0.CO;2-Q	en
heal.identifier.secondary	http://dx.doi.org/10.1002/(SICI)1099-0488(19970730)35:10<1545::AID-POLB7>3.0.CO;2-Q	en
heal.language	English	en
heal.publicationDate	1997	en
heal.abstract	We report the results of detailed investigations of polymer-water interactions and of the organization of water in the poly( ethylene oxide) (PEO)/water system by dielectric techniques. They include thermally stimulated depolarization currents (TSDC) techniques in the temperature range of 77-300 K and broadband dielectric relaxation spectroscopy (DRS) techniques of frequencies, 5 Hz-10 GHz, and temperatures, 173-300 K. The water content h was varied between 0 and 1.21 (grams of water per gram of dry PEO). The secondary gamma mechanism of PEO and the reorientation of absorbed water molecules were extensively studied. The gamma mechanism was found to be plasticized up to water contents of about 0.20. The reorientation of water molecules was studied in three different experiments and frequency/temperature regions. The results suggest strong interactions in the PEO/water system and indicate the presence of a separate water phase at high water contents. (C) 1997 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(19970730)35:10<1545::AID-POLB7>3.0.CO;2-Q	en
dc.identifier.isi	ISI:A1997XH93700007	en
dc.identifier.volume	35	en
dc.identifier.issue	10	en
dc.identifier.spage	1545	en
dc.identifier.epage	1560	en