Oxygen Diffusion into Polymer-Clay Composite Films as a Function of Clay Content and Temperature

dc.contributor.authorUğur, Şaziye
dc.contributor.authorYargı, Önder
dc.contributor.authorElaissari, Abdelhamid
dc.contributor.authorPekcan, Önder
dc.date.accessioned2019-06-27T08:05:51Z
dc.date.available2019-06-27T08:05:51Z
dc.date.issued2009
dc.departmentFakülteler, Mühendislik ve Doğa Bilimleri Fakültesi, Biyoinformatik ve Genetik Bölümüen_US
dc.description.abstractA simple fluorescence technique is proposed for the measurement of the diffusion coefficient of oxygen into polystyrene-clay composite films as a function of clay content and temperature. The composite films were prepared from a mixture of surfactant-free pyrene-labeled polystyrene latexes and modified Na-montmorillonite clay of various compositions at room temperature. Diffusion measurements were performed with films at room temperature for seven different clay contents (0 5 10 20 30 50 and 60 wt.%). The diffusion coefficients of oxygen increased from 7.4 x 10(-10) to 26.9 x 10(-10) cm(2)s(-1) with increasing clay content. On the other hand diffusion measurements were performed over a temperature range Of 25-70 degrees C for 0 5 and 20 wt.% clay content films. The calculated diffusion activation energies decreased from 2.44 to 0.44 kcal/mol with increasing clay content. No clay content and temperature effects were observed on quenching rate constant and mutual diffusion coefficient values. The results showed that the diffusion coefficients are strongly dependent on both the temperature and clay content in the film.en_US]
dc.identifier.citation3
dc.identifier.doi10.1002/masy.200950722en_US
dc.identifier.endpage173
dc.identifier.issn1022-1360en_US
dc.identifier.issn1521-3900en_US
dc.identifier.issn1022-1360
dc.identifier.issn1521-3900
dc.identifier.scopus2-s2.0-68349119127en_US
dc.identifier.scopusqualityQ3
dc.identifier.startpage168en_US
dc.identifier.urihttps://hdl.handle.net/20.500.12469/1126
dc.identifier.volume281en_US
dc.identifier.wosWOS:000268989100023en_US
dc.identifier.wosqualityN/A
dc.institutionauthorPekcan, Önderen_US
dc.language.isoenen_US
dc.publisherWiley-VCH Verlag GmbHen_US
dc.relation.publicationcategoryKonferans Öğesi - Uluslararası - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectClayen_US
dc.subjectCompositeen_US
dc.subjectDiffusionen_US
dc.subjectFluorescenceen_US
dc.subjectPolystyrene latexen_US
dc.titleOxygen Diffusion into Polymer-Clay Composite Films as a Function of Clay Content and Temperatureen_US
dc.typeConference Objecten_US
dspace.entity.typePublication

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