Volume and enthalpy relaxation in a-PMMA after temperature up-jumps

Slobodian, Petr; Lengálová, Anežka; Sáha, Petr

dc.title	Volume and enthalpy relaxation in a-PMMA after temperature up-jumps	en
dc.contributor.author	Slobodian, Petr
dc.contributor.author	Lengálová, Anežka
dc.contributor.author	Sáha, Petr
dc.relation.ispartof	Journal of Thermal Analysis and Calorimetry
dc.identifier.issn	1388-6150 Scopus Sources, Sherpa/RoMEO, JCR
dc.date.issued	2003
utb.relation.volume	71
utb.relation.issue	2
dc.citation.spage	387
dc.citation.epage	393
dc.type	article
dc.language.iso	en
dc.publisher	Kluwer Academic Publishers	en
dc.identifier.doi	10.1023/A:1022827104029
dc.relation.uri	http://www.springerlink.com/content/v5590109085w2532/
dc.subject	a-PMMA	en
dc.subject	enthalpy relaxation	en
dc.subject	memory effect	en
dc.subject	physical aging	en
dc.subject	volume relaxation	en
dc.description.abstract	The volume and enthalpy relaxation in a-PMMA subjected to temperature jumps in T-g region has been analysed. The measured Hand Vdata were compared with respect to aging time and proportionality between them as a slope of (partial derivativeH/partial derivativeV)(T) dependencies has been found. According to previous works the slope was identified as an apparent bulk modulus, K-a. This method is applied to aging following temperature up-jumps after consolidation periods of varying lengths. The main finding is a marked increase of K-a with consolidation time, approaching a limiting value in an asymptotic fashion.	en
utb.faculty	Faculty of Technology
dc.identifier.uri	http://hdl.handle.net/10563/1002036
utb.identifier.scopus	2-s2.0-0037288337
utb.identifier.wok	000181454400008
utb.identifier.coden	JTACF
utb.source	j-wok
dc.date.accessioned	2011-08-16T15:06:13Z
dc.date.available	2011-08-16T15:06:13Z
utb.contributor.internalauthor	Slobodian, Petr
utb.contributor.internalauthor	Lengálová, Anežka
utb.contributor.internalauthor	Sáha, Petr