Temperature-humidity superposition in diffusion phenomena through polyamidic materials

Hatzigrigoriou, NB; Vouyiouka, SN; Joly, C; Dole, P; Papaspyrides, CD

dc.contributor.author	Hatzigrigoriou, NB	en
dc.contributor.author	Vouyiouka, SN	en
dc.contributor.author	Joly, C	en
dc.contributor.author	Dole, P	en
dc.contributor.author	Papaspyrides, CD	en
dc.date.accessioned	2014-03-01T02:14:47Z
dc.date.available	2014-03-01T02:14:47Z
dc.date.issued	2012	en
dc.identifier.issn	00218995	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/30115
dc.subject	diffusion	en
dc.subject	fluorescence recovery after photobleaching	en
dc.subject	hydration effects	en
dc.subject	hydrogen bonding	en
dc.subject	plasticization	en
dc.subject	polyamides	en
dc.subject	water content-temperature superposition	en
dc.subject.other	Barrier properties	en
dc.subject.other	Diffusion phenomena	en
dc.subject.other	Diffusion process	en
dc.subject.other	Fluorescence recovery after photobleaching	en
dc.subject.other	Glass transition points	en
dc.subject.other	Hydration effects	en
dc.subject.other	plasticization	en
dc.subject.other	Specific interaction	en
dc.subject.other	Temperature increase	en
dc.subject.other	Diffusion	en
dc.subject.other	Glass transition	en
dc.subject.other	Hydration	en
dc.subject.other	Hydrogen bonds	en
dc.subject.other	Photobleaching	en
dc.subject.other	Polyamides	en
dc.subject.other	Amides	en
dc.title	Temperature-humidity superposition in diffusion phenomena through polyamidic materials	en
heal.type	journalArticle	en
heal.identifier.primary	10.1002/app.36279	en
heal.identifier.secondary	http://dx.doi.org/10.1002/app.36279	en
heal.publicationDate	2012	en
heal.abstract	In this work, the diffusivity of three different migrants is investigated in water plasticized polyamides, while changing humidity at a steady temperature, and also in dry polyamides tested at different temperatures close to the glass transition point (Tg). The effect of hydration on the structure and the barrier properties of polyamides are investigated and the results reveal that the diffusion coefficient (D) can be described by a single Williams-Landel-Ferry type equation, expressing D as a function of the (T - Tg) parameter. This correlation is found valid regardless the cause of (T - Tg) variation that could be temperature increase or Tg reduction due to water induced plasticization. At the same time, the effect of specific interactions between the polyamidic matrix and the diffusing molecules is also investigated, indicating that such interactions are capable of delaying the diffusion process regardless the temperature increase or the extent of plasticization. © 2012 Wiley Periodicals, Inc.	en
heal.journalName	Journal of Applied Polymer Science	en
dc.identifier.doi	10.1002/app.36279	en
dc.identifier.volume	125	en
dc.identifier.issue	4	en
dc.identifier.spage	2814	en
dc.identifier.epage	2823	en