Photo-oxidative degradation of poly(epichlorohydrin-co-ethylene oxide) elastomer at 254 nm

dc.creatorSoto-Oviedo, MA
dc.creatorDe Paoli, MA
dc.date2002
dc.date2014-11-18T02:00:36Z
dc.date2015-11-26T17:45:18Z
dc.date2014-11-18T02:00:36Z
dc.date2015-11-26T17:45:18Z
dc.date.accessioned2018-03-29T00:27:37Z
dc.date.available2018-03-29T00:27:37Z
dc.identifierPolymer Degradation And Stability. Elsevier Sci Ltd, v. 76, n. 2, n. 219, n. 225, 2002.
dc.identifier0141-3910
dc.identifierWOS:000175286200007
dc.identifier10.1016/S0141-3910(02)00017-4
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/59667
dc.identifierhttp://www.repositorio.unicamp.br/handle/REPOSIP/59667
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/59667
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1288140
dc.descriptionThe photo-degradation of unstabilised poly(epichlorohydrin-co-ethylene oxide) was evaluated under accelerated ageing conditions by infrared spectrophotometry (FTIR), gel permeation chromatography (GPC) and scanning electron microscopy (SEM). The elastomer photo-degradation leads to the formation and increase of carbonyl containing products, hydroxyl and hydroperoxide groups. FTIR spectra after elastomer photo-degradation and derivatization in an inert atmosphere, indicate that hydroperoxides are the first products of the photo-oxidation and their photolysis produces carbonyl-containing products. These are subsequently photolyzed to produce carboxylic acids, alcohols, esters and others minor products. The study of the average molar mass by GPC shows that it decreases exponentially during the first 2 h of irradiation, with evidence for random chain scission. The SEM study shows that photo-degradation leads to the formation of micro-cracks on the polymer surface. (C) 2002 Elsevier Science Ltd. All rights reserved.
dc.description76
dc.description2
dc.description219
dc.description225
dc.languageen
dc.publisherElsevier Sci Ltd
dc.publisherOxford
dc.publisherInglaterra
dc.relationPolymer Degradation And Stability
dc.relationPolym. Degrad. Stabil.
dc.rightsfechado
dc.rightshttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dc.sourceWeb of Science
dc.subjectphoto-oxidative degradation
dc.subjectpoly(epichlorohydrin-co-ethylene oxide)
dc.subjectUV irradiation
dc.subjectelastomer
dc.subjectPoly(ethylene Oxide)
dc.subjectPhotooxidative Degradation
dc.subjectPoly(vinyl Chloride)
dc.subjectRefractive-index
dc.subjectUv Irradiation
dc.subjectSolar-cells
dc.subjectPhotodegradation
dc.subjectElectrolyte
dc.subjectComplexes
dc.subjectPolymers
dc.titlePhoto-oxidative degradation of poly(epichlorohydrin-co-ethylene oxide) elastomer at 254 nm
dc.typeArtículos de revistas


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