Dielectric spectroscopy on propylene glycol/poly(vinyl pyrrolidone) solutions: Polymer and solvent dynamics in hydrogen-bonding systems

Spanoudaki, A; Shinyashiki, N; Kyritsis, A; Pissis, P

dc.contributor.author	Spanoudaki, A	en
dc.contributor.author	Shinyashiki, N	en
dc.contributor.author	Kyritsis, A	en
dc.contributor.author	Pissis, P	en
dc.date.accessioned	2014-03-01T02:51:35Z
dc.date.available	2014-03-01T02:51:35Z
dc.date.issued	2008	en
dc.identifier.issn	0094243X	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/35580
dc.subject	Dielectric spectroscopy	en
dc.subject	Glass transition	en
dc.subject	Polymer solutions	en
dc.title	Dielectric spectroscopy on propylene glycol/poly(vinyl pyrrolidone) solutions: Polymer and solvent dynamics in hydrogen-bonding systems	en
heal.type	conferenceItem	en
heal.identifier.primary	10.1063/1.2897766	en
heal.identifier.secondary	http://dx.doi.org/10.1063/1.2897766	en
heal.publicationDate	2008	en
heal.abstract	The dielectric behavior of solvent-rich solutions of poly(vinyl pyrrolidone) in propylene glycol has been studied through broadband dielectric spectroscopy. Measurements covered a broad temperature range both in the liquid and the glassy state of the samples and concentrations from 0% to 60% wt. of poly(vinyl pyrrolidone). Two distinct glass transitions are observed dielectrically, evidencing decoupling of the segmental motion of PVP and the rotation of the propylene glycol molecules. The decoupling appears not to be full, since the dielectric strength data hint to a participation of propylene glycol molecules in the relaxation connected with the glass transition attributed to poly(vinyl pyrrolidone). Interactions between the two components are expressed through the concentration dependency of the relaxation times, as well as through the marked broadening of the propylene glycol relaxation. © 2008 American Institute of Physics.	en
heal.journalName	AIP Conference Proceedings	en
dc.identifier.doi	10.1063/1.2897766	en
dc.identifier.volume	982	en
dc.identifier.spage	125	en
dc.identifier.epage	130	en