Determination of pre-gelation and post-gelation activation energies during free radical crosslinking copolymerization

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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.accessioned2019-08-05T16:05:04Z
dc.date.available2019-08-31T12:10:23Z
dc.date.available2019-08-05T16:05:04Z
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.abstractSteady-state fluorescence (SSF) and dilatoraetric techniques were used to study the free-radical crosslinking copolymerization (FCC) of styrene (S) and divinylbenzene (DVB) in bulk. The gel points (t g) were recorded by dilatometry at various DVB contents and temperatures in pre-gelation regime during FCC process. Pyrene (Py) was used as a fluorescence probe for the in situ polymerization experiments. The time required for a sudden increase in the fluorescence intensity of Py was recorded for the samples at various DVB contents and temperatures. Py fluorescence intensity during FCC exhibits a sudden increase corresponding to the reaction time at which the rate of polymerization becomes maximum due to the gel effect in post-gelation regime. The onset of gel effect point (t ge) was determined for various DVB contents and temperatures. The results show that alhough the dilatometric technique recorded the gel point, the fluorescence technique can be used to monitor the onset of the gel effect during S–DVB copolymerization. Pre-gelation and post-gelation actuation energies. ?E pre and ?E post were measured and it is observed that pre-gelation regime needs smaller energies than post-gelation regime during FCC.en_US
dc.description.sponsorshipThis work has been supported in part by the Turkish Academy of Sciences (TUBA)en_US
dc.description.versionPublisher's Versionen_US
dc.identifier.citationKaya Aktaş, D. & Pekcan, M. Ö. (2005). Determination of pre-gelation and post-gelation activation energies during free radical crosslinking copolymerization. Composite Interfaces, 12(5), 395-410. doi:10.1163/1568554054275742en_US
dc.identifier.doi10.1163/1568554054275742
dc.identifier.endpage410
dc.identifier.issn0927-6440
dc.identifier.issn1568-5543
dc.identifier.issue5
dc.identifier.scopus2-s2.0-22944475308
dc.identifier.scopusqualityQ2
dc.identifier.startpage395
dc.identifier.urihttps://hdl.handle.net/11729/2028
dc.identifier.urihttps://dx.doi.org/10.1163/1568554054275742
dc.identifier.volume12
dc.identifier.wosWOS:000230814100001
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.ispartofComposite Interfacesen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectActivation energyen_US
dc.subjectFree-radical crosslinking copolymerizationen_US
dc.subjectGel effecten_US
dc.subjectGel pointen_US
dc.subjectSteady-state fluorescenceen_US
dc.subjectFast transient fluorescenceen_US
dc.subjectMethyl-methacrylateen_US
dc.subjectHigh conversionsen_US
dc.subjectPolymerizationen_US
dc.subjectStyreneen_US
dc.subjectTemperaturesen_US
dc.titleDetermination of pre-gelation and post-gelation activation energies during free radical crosslinking copolymerizationen_US
dc.typeArticleen_US
dspace.entity.typePublication

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