A NEW EQUATION OF THE RELAXATION PROCESS IN THE NONEQUILIBRIUM STATE - APPLICATION TO CREEP AND DYNAMIC EXPERIMENTS IN EPOXY-RESINS

SPATHIS, G; KONTOU, E; BOURKAS, G

dc.contributor.author	SPATHIS, G	en
dc.contributor.author	KONTOU, E	en
dc.contributor.author	BOURKAS, G	en
dc.date.accessioned	2014-03-01T01:40:51Z
dc.date.available	2014-03-01T01:40:51Z
dc.date.issued	1991	en
dc.identifier.issn	0148-6055	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/23276
dc.subject.classification	Mechanics	en
dc.subject.other	GLASSY-STATE	en
dc.title	A NEW EQUATION OF THE RELAXATION PROCESS IN THE NONEQUILIBRIUM STATE - APPLICATION TO CREEP AND DYNAMIC EXPERIMENTS IN EPOXY-RESINS	en
heal.type	journalArticle	en
heal.language	English	en
heal.publicationDate	1991	en
heal.abstract	Following the Adam-Gibbs procedure for the calculation of the configurational entropy S(c), a Vogel-Fulcher type equation has been obtained, determined by a new structural parameter T-upsilon. The equation obtained by this procedure in the equilibrium state reduces to a WLF form with universal constants, as expected. In the nonequilibrium state, an equation of the same form is determined with material-dependent constants. Experimental data for three types of epoxy resins, obtained by creep and dynamic tests, were applied to evaluate this equation, and a common value of the activation energy H was found, it being constant for a wide temperature range in the glassy state.	en
heal.publisher	AMER INST PHYSICS	en
heal.journalName	JOURNAL OF RHEOLOGY	en
dc.identifier.isi	ISI:A1991GP27200002	en
dc.identifier.volume	35	en
dc.identifier.issue	8	en
dc.identifier.spage	1481	en
dc.identifier.epage	1497	en