Comparision of critical parameters of polymerization and gelation processes: A fast transient fluorescence study

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dc.authorid0000-0003-2352-9129
dc.authorid0000-0002-0082-8209
dc.contributor.authorKaya Aktaş, Demeten_US
dc.contributor.authorPekcan, Mehmet Önderen_US
dc.date.accessioned2019-08-31T12:10:23Z
dc.date.accessioned2019-08-05T16:05:05Z
dc.date.available2019-08-31T12:10:23Z
dc.date.available2019-08-05T16:05:05Z
dc.date.issued2005-03-10
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 technique was used to study free-radical polymerization and crosslinking copolymerization of styrene. Ethylene glycol dimethacrylate and Pyrene were used as crosslinking agent and fluorescence probe, respectively. The fluorescence lifetimes of Pyrene from its decay traces were measured and used to monitor the vitrification processes at various temperatures. Changes in the viscosity due to polymer formation dramatically enhanced the fluorescent yield of pyrene molecules. This effect is used to monitor the polymerization and crosslinking copolymerization of Styrene as a function of time, at various temperatures. The results are interpreted in the view of static percolation theory. The critical exponents ß and ? for vitrified fraction and average degree of polymerization were found to be 0.39 ± 0.012; 1.62 ± 0.036 and 0.39 ± 0.004; 1.69 ± 0.064 in agreement with percolation results for polymerization and gelation processes, respectively. Activation energies for polymerization and gelation (?EP and ?EG) were measured and found to be 112.0 ± 4 and 86.9 ± 4 kJ mol-1, respectively.en_US
dc.description.versionPublisher's Versionen_US
dc.identifier.citationKaya Aktaş, D. & Pekcan, M. Ö. (2005). Comparision of critical parameters of polymerization and gelation processes: A fast transient fluorescence study. International Journal of Modern Physics B, 19(6), 971-987. doi:10.1142/S0217979205029390en_US
dc.identifier.doi10.1142/S0217979205029390
dc.identifier.endpage987
dc.identifier.issn0217-9792
dc.identifier.issue6
dc.identifier.scopus2-s2.0-20844453249
dc.identifier.scopusqualityQ2
dc.identifier.startpage971
dc.identifier.urihttps://hdl.handle.net/11729/2035
dc.identifier.urihttps://dx.doi.org/10.1142/S0217979205029390
dc.identifier.volume19
dc.identifier.wosWOS:000228783500002
dc.identifier.wosqualityQ2
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.indekslendigikaynakScience Citation Index Expanded (SCI-EXPANDED)en_US
dc.institutionauthorKaya Aktaş, Demeten_US
dc.institutionauthorPekcan, Mehmet Önderen_US
dc.institutionauthorid0000-0003-2352-9129
dc.institutionauthorid0000-0002-0082-8209
dc.language.isoenen_US
dc.peerreviewedYesen_US
dc.publicationstatusPublisheden_US
dc.publisherWorld Scientific Publ Co Pte Ltden_US
dc.relation.ispartofInternational Journal of Modern Physics Ben_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectActivation energiesen_US
dc.subjectCritical exponentsen_US
dc.subjectFast transient fluorescence techniqueen_US
dc.subjectPercolation theoryen_US
dc.subjectPolymerization and gelationen_US
dc.subjectCross-linking copolymerizationen_US
dc.subjectMolecular-size distributionen_US
dc.subjectFree-radical polymerizationen_US
dc.subjectSol-gel transitionen_US
dc.subjectGlass-transitionen_US
dc.subjectMethyl-methacrylateen_US
dc.subjectCritical exponentsen_US
dc.subjectHigh conversionsen_US
dc.subjectRate constantsen_US
dc.subjectPolymersen_US
dc.titleComparision of critical parameters of polymerization and gelation processes: A fast transient fluorescence studyen_US
dc.typeArticleen_US
dspace.entity.typePublication

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