Molecular mobility and hydration properties in polyurethane and styrene-acrylonitrile blends

Kanapitsas, A; Pissis, P

dc.contributor.author	Kanapitsas, A	en
dc.contributor.author	Pissis, P	en
dc.date.accessioned	2014-03-01T01:14:49Z
dc.date.available	2014-03-01T01:14:49Z
dc.date.issued	1999	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/13238
dc.subject	Diffusion Coefficient	en
dc.subject	Water Uptake	en
dc.subject	Water Content	en
dc.subject.other	Copolymers	en
dc.subject.other	Desorption	en
dc.subject.other	Dielectric relaxation	en
dc.subject.other	Diffusion	en
dc.subject.other	Hydration	en
dc.subject.other	Isotherms	en
dc.subject.other	Molecular dynamics	en
dc.subject.other	Molecular spectroscopy	en
dc.subject.other	Polyacrylonitriles	en
dc.subject.other	Polystyrenes	en
dc.subject.other	Polyurethanes	en
dc.subject.other	Water	en
dc.subject.other	Molecular mobility	en
dc.subject.other	Thermally stimulated depolarization currents	en
dc.subject.other	Polymer blends	en
dc.title	Molecular mobility and hydration properties in polyurethane and styrene-acrylonitrile blends	en
heal.type	journalArticle	en
heal.identifier.primary	10.1109/ISE.1999.832090	en
heal.identifier.secondary	http://dx.doi.org/10.1109/ISE.1999.832090	en
heal.publicationDate	1999	en
heal.abstract	Dielectric measurements by means of thermally stimulated depolarization currents (TSDC) techniques in the temperature range 90 - 300 K were used to study molecular mobility and morphology in blends of polyurethanes based on branched polymer polyol (PUR) and styrene-acrylonitrile copolymer (SAN) with different SAN content. Water sorption/desorption isotherms both in equilibrium (ESI) and dynamic (DSI) were used to measure isothermal water uptake and diffusion coefficients. Water sorption has a significant influence on the γ and β relaxations. With increasing water content the MWS peak shifts to lower temperatures. For all samples studied the amount of water at saturation was found to decrease with increasing temperature and SAN content in the blends.	en
heal.publisher	IEEE, Piscataway, NJ, United States	en
heal.journalName	Proceedings - International Symposium on Electrets	en
dc.identifier.doi	10.1109/ISE.1999.832090	en
dc.identifier.spage	485	en
dc.identifier.epage	488	en