Universal behaviour of glass transition exponents in various polymeric systems

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dc.authorid0000-0002-0082-8209
dc.authorid0000-0003-2352-9129
dc.contributor.authorPekcan, Mehmet Önderen_US
dc.contributor.authorKaya Aktaş, Demeten_US
dc.date.accessioned2015-01-15T23:00:21Z
dc.date.available2015-01-15T23:00:21Z
dc.date.issued2005
dc.departmentIşık Üniversitesi, Fen Edebiyat Fakültesi, Fizik Bölümüen_US
dc.departmentIşık University, Faculty of Arts and Sciences, Department of Physicsen_US
dc.description.abstractThe fast transient fluorescence (FTRF) technique was used to study the critical exponents during glass transition in free-radical cross-linking copolymerization (FCC). Methyl methacrylate (MMA), ethyl methacrylate (EMA) and various combinations of MMA with EMA were used during FCC experiments. Pyrene (Py) was used as a fluorescence probe and its fluorescence lifetimes from its decay traces were measured during glass transition. Changes in the viscosity of the pre-gel solutions due to glass formation dramatically increased the Py fluorescent lifetimes, which were used to study the glass transition of MMA, EMA and their mixtures as a function of time, at various temperatures and monomer concentrations. The results were interpreted in the view of percolation theory. The critical exponents, beta and gamma, were measured near the glass transition point and found to be around 0.37 +/- 0.015 and 1.69 +/- 0.05, respectively, in all systems studied, which are in good agreement with the static percolation results.en_US
dc.description.versionPublisher's Versionen_US
dc.identifier.citationPekcan, M. Ö. & Kaya Aktaş, D. (2005). Universal behaviour of glass transition exponents in various polymeric systems. Composite Interfaces, 12(6), 501-521. doi:10.1163/1568554054915192en_US
dc.identifier.doi10.1163/1568554054915192
dc.identifier.endpage521
dc.identifier.issn0927-6440
dc.identifier.issn1568-5543
dc.identifier.issue6
dc.identifier.scopus2-s2.0-27844495864
dc.identifier.scopusqualityQ2
dc.identifier.startpage501
dc.identifier.urihttps://hdl.handle.net/11729/189
dc.identifier.urihttp://dx.doi.org/10.1163/1568554054915192
dc.identifier.volume12
dc.identifier.wosWOS:000233423200002
dc.identifier.wosqualityQ3
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.indekslendigikaynakScience Citation Index Expanded (SCI-EXPANDED)en_US
dc.institutionauthorPekcan, Mehmet Önderen_US
dc.institutionauthorid0000-0002-0082-8209
dc.language.isoenen_US
dc.peerreviewedYesen_US
dc.publicationstatusPublisheden_US
dc.publisherVSP BV, Brill Academic Publishersen_US
dc.relation.ispartofComposite Interfacesen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectCross-linking copolymerizationen_US
dc.subjectTransient fluorescence techniqueen_US
dc.subjectSol-gel transitionen_US
dc.subjectMethyl-methacrylateen_US
dc.subjectEnergy-transferen_US
dc.subjectGelationen_US
dc.subjectBulken_US
dc.subjectDivinylbenzeneen_US
dc.subjectMorphologyen_US
dc.subjectColloidsen_US
dc.subjectCritical exponentsen_US
dc.subjectFluorescenceen_US
dc.subjectGlass transitionen_US
dc.subjectPolymeren_US
dc.subjectConcentration (process)en_US
dc.subjectCopolymerizationen_US
dc.subjectCrosslinkingen_US
dc.subjectViscosityen_US
dc.subjectFTRFen_US
dc.subjectMethacrylateen_US
dc.subjectLiquidsen_US
dc.titleUniversal behaviour of glass transition exponents in various polymeric systemsen_US
dc.typeArticleen_US
dspace.entity.typePublication

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