UV-visible technique for studying powder coatings and their dissolution

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dc.authoridPEKCAN, Onder/0000-0002-0082-8209
dc.authorwosidPEKCAN, Onder/Y-3158-2018
dc.contributor.authorPekcan, Ö
dc.contributor.authorArda, E
dc.date.accessioned2024-06-12T11:20:03Z
dc.date.available2024-06-12T11:20:03Z
dc.date.issued2001
dc.departmentTrakya Üniversitesien_US
dc.description79th Annual Meeting of the Federation-of-Societies-for-Coatings-Technology -- NOV 04-07, 2001 -- ATLANTA, GEORGIAen_US
dc.description.abstractUV-Visible (UVV) technique was used to monitor powder coating and its dissolution processes from hard latex particles. Three sets of latex coatings were prepared from poly(methyl methacrylate) (PMMA) particles. The first set of coatings was annealed at elevated temperatures in various time intervals during which reflected photon intensity, I-rf, was measured. The second set of coatings was annealed at various temperatures in 10 min time intervals during which transmitted intensity, I-tr, was measured. I-rf first decreased and then increased as the annealing temperature was increased. Decrease in I-rf was explained with the void closure mechanism due to viscous flow. Increase in I-tr and I-rf against time and temperature were attributed to an increase in crossing density at the junction surface. The activation energy of viscous flow, DeltaH was measured and found to be around 8 kcal/mol and the back and forth activation energies (DeltaE(rf) and DeltaE(tr)) were measured and found to be around 49 and 53 kcal/mol for a reptating polymer chain across the junction surface. Diffusion of solvent molecules (chloroform) into the annealed latex coatings was followed by desorption of PMMA chains for the third set of films. Desorption of pyrene, P, labeled PMMA chains was monitored in real-time by the absorbance change of pyrene in the polymer-solvent mixture. A diffusion model with a moving boundary was employed to quantify realtime UVV data. Diffusion coefficients of desorbed PMMA chains were measured and found to be between 2 and 0.6 x 10(-11) cm(2) s(-1) in the 100 and 275 degreesC temperature range.en_US
dc.description.sponsorshipFed Soc Coatings Techen_US
dc.identifier.doi10.1007/BF02720134
dc.identifier.endpage60en_US
dc.identifier.issn0361-8773
dc.identifier.issue923en_US
dc.identifier.scopus2-s2.0-0035659350en_US
dc.identifier.scopusqualityN/Aen_US
dc.identifier.startpage51en_US
dc.identifier.urihttps://doi.org/10.1007/BF02720134
dc.identifier.urihttps://hdl.handle.net/20.500.14551/25448
dc.identifier.volume73en_US
dc.identifier.wosWOS:000172748100005en_US
dc.identifier.wosqualityQ3en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherFederation Soc Coating Techen_US
dc.relation.ispartofJournal Of Coatings Technologyen_US
dc.relation.publicationcategoryKonferans Öğesi - Uluslararası - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectT Latex-Particlesen_US
dc.subjectFilm Formationen_US
dc.subjectEnergy-Transferen_US
dc.subjectPoly(Methyl Methacrylate)en_US
dc.subjectPolymer Dissolutionen_US
dc.subjectPhoton Transmissionen_US
dc.subjectFluorescenceen_US
dc.subjectDiffusionen_US
dc.subjectKineticsen_US
dc.subjectCoalescenceen_US
dc.titleUV-visible technique for studying powder coatings and their dissolutionen_US
dc.typeConference Objecten_US

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