Molecular alignment during gel formation from methyl methacrylate: An excimer fluorescence study

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dc.authorid0000-0003-2352-9129
dc.authorid0000-0003-4440-1896
dc.authorid0000-0002-0082-8209
dc.contributor.authorKaya Aktaş, Demeten_US
dc.contributor.authorErdoğan, Matemen_US
dc.contributor.authorPekcan, Mehmet Önderen_US
dc.date.accessioned2015-01-15T23:00:20Z
dc.date.available2015-01-15T23:00:20Z
dc.date.issued2005-05
dc.departmentIşık Üniversitesi, Fen Edebiyat Fakültesi, Fizik Bölümüen_US
dc.departmentIşık University, Faculty of Arts and Sciences, Department of Physicsen_US
dc.description.abstractGlass transition during bulk polymerization was studied in free-radical cross-linking copolymerization (FCC) of methyl methacrylate (MMA) using the steady-state fluorescence (SSF) technique. Naphthalene (N) was used as a monomer and excimer forming probe. Changes in the viscosity of the pregel solutions due to gel formation dramatically enhance both monomer and excimer fluorescent yield of N molecules. The reaction time at which the monomer and excimer intensities exhibit a sudden increase corresponds to the reaction time at which the rate of polymerization becomes maximum resulting from the gel effect. This effect was used to study the gelation of MMA, as a function of time, in various N concentrations. The results were interpreted in the view of percolation theory. The gel fraction, beta, and weight average degree of polymerization, gamma, exponents beta=0.40 +/- 0.02 and gamma=1.70 +/- 0.07 were found in agreement with percolation results for both monomer and excimer measurements, respectively.en_US
dc.description.versionPublisher's Versionen_US
dc.identifier.citationKaya Aktaş, D., Erdoğan, M. & Pekcan, M. Ö. (2005). Molecular alignment during gel formation from methyl methacrylate: An excimer fluorescence study. Phase Transitions, 78(5), 387-400. doi:10.1080/01411590500114799en_US
dc.identifier.doi10.1080/01411590500114799
dc.identifier.endpage400
dc.identifier.issn0141-1594
dc.identifier.issue5
dc.identifier.scopus2-s2.0-22444434279
dc.identifier.scopusqualityQ3
dc.identifier.startpage387
dc.identifier.urihttps://hdl.handle.net/11729/183
dc.identifier.urihttp://dx.doi.org/10.1080/01411590500114799
dc.identifier.volume78
dc.identifier.wosWOS:000230649700003
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.publisherTaylor & Francis Ltden_US
dc.relation.ispartofPhase Transitionsen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectFree-radical polymerizationen_US
dc.subjectGlass-transitionen_US
dc.subjectRate constantsen_US
dc.subjectBulken_US
dc.subjectCopolymerizationen_US
dc.subjectLiquidsen_US
dc.subjectProbeen_US
dc.subjectExcimer lasersen_US
dc.subjectFluorescenceen_US
dc.subjectFree radical polymerizationen_US
dc.subjectGelsen_US
dc.subjectGlass transitionen_US
dc.subjectMolecular orientationen_US
dc.subjectNaphthaleneen_US
dc.subjectGelationen_US
dc.titleMolecular alignment during gel formation from methyl methacrylate: An excimer fluorescence studyen_US
dc.typeArticleen_US
dspace.entity.typePublication

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