Protooxidation behaviour of HMS-PP

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dc.contributor.authorOLIANI, WASHINGTON L.pt_BR
dc.contributor.authorPARRA, DUCLERC F.pt_BR
dc.contributor.authorLIMA, LUIS F.C.P.pt_BR
dc.contributor.authorLUGAO, ADEMAR B.pt_BR
dc.coverageInternacionalpt_BR
dc.creator.eventoINTERNATIONAL NUCLEAR ATLANTIC CONFERENCE; MEETING ON NUCLEAR APPLICATIONS, 9th; MEETING ON REACTOR PHYSICS AND THERMAL HYDRAULICS, 16th; MEETING ON NUCLEAR INDUSTRY, 1stpt_BR
dc.date.accessioned2014-11-17T17:04:58Zpt_BR
dc.date.accessioned2014-11-18T19:27:18Zpt_BR
dc.date.accessioned2015-04-02T00:26:04Z
dc.date.available2014-11-17T17:04:58Zpt_BR
dc.date.available2014-11-18T19:27:18Zpt_BR
dc.date.available2015-04-02T00:26:04Z
dc.date.eventoSeptember 27 - October 2, 2009pt_BR
dc.description.abstractThe radiation process has played an important role to produce polymers with controlled rheological properties. The main scope of the study is to evaluate the stability of High melt strength polypropylene (HMS-PP) prepared by gamma irradiation of PP (spheres) under acetylene atmosphere followed by a heating step to terminate reactions, in different doses of 12.5 kGy and 20 kGy. The samples submitted to the natural ageing for a period of one year were characterized by: thermogravimetry (TG), differential scanning calorimetry (DSC), infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). The fundamental process that is believed to be the most significant in the mechanism of photooxidative degradation is the formation of hydroperoxides. The high energy UV light is capable of initiating bond scission within the polymer backbone, which leads to further chemical modification of the bonds via scissions and chain reactions through formation of radical species. The results showed that in pristine and HMS-PP samples exposed to UV radiation, oxidation reactions occur, resulting in chain scissions. The reactions occur preferentially in the amorphous phase owing to the higher permeability of oxygen.
dc.event.siglaINAC; ENAN; ENFIR; ENINpt_BR
dc.identifier.citationOLIANI, WASHINGTON L.; PARRA, DUCLERC F.; LIMA, LUIS F.C.P.; LUGAO, ADEMAR B. Protooxidation behaviour of HMS-PP. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE; MEETING ON NUCLEAR APPLICATIONS, 9th; MEETING ON REACTOR PHYSICS AND THERMAL HYDRAULICS, 16th; MEETING ON NUCLEAR INDUSTRY, 1st, September 27 - October 2, 2009, Rio de Janeiro, RJ. <b>Proceedings...</b> Disponível em: http://repositorio.ipen.br/handle/123456789/11954.
dc.identifier.orcidhttps://orcid.org/0000-0002-1737-3191
dc.identifier.orcidhttps://orcid.org/0000-0002-7626-880X
dc.identifier.urihttp://repositorio.ipen.br/handle/123456789/11954pt_BR
dc.local.eventoRio de Janeiro, RJpt_BR
dc.publisherSao Paulo: ABEN, 2009pt_BR
dc.rightsopenAccesspt_BR
dc.subjectagingpt_BR
dc.subjectcalorimetrypt_BR
dc.subjectcobalt 60pt_BR
dc.subjectcrackspt_BR
dc.subjectcross-linkingpt_BR
dc.subjectexperimental datapt_BR
dc.subjectgamma radiationpt_BR
dc.subjectheatingpt_BR
dc.subjectinfrared spectrapt_BR
dc.subjectmeltingpt_BR
dc.subjectpolypropylenept_BR
dc.subjectradiation dosespt_BR
dc.subjectradiation effectspt_BR
dc.subjectscanning electron microscopypt_BR
dc.subjectstabilitypt_BR
dc.subjecttemperature dependencept_BR
dc.subjecttensile propertiespt_BR
dc.subjectthermal gravimetric analysispt_BR
dc.subjecttime dependencept_BR
dc.subjectultraviolet radiationpt_BR
dc.titleProtooxidation behaviour of HMS-PPpt_BR
dc.typeTexto completo de eventopt_BR
dspace.entity.typePublication
ipen.autorADEMAR BENEVOLO LUGAO
ipen.autorLUIS FILIPE CARVALHO PEDROSO DE LIMA
ipen.autorDUCLERC FERNANDES PARRA
ipen.autorWASHINGTON LUIZ OLIANI
ipen.codigoautor339
ipen.codigoautor1208
ipen.codigoautor562
ipen.codigoautor5821
ipen.contributor.ipenauthorADEMAR BENEVOLO LUGAO
ipen.contributor.ipenauthorLUIS FILIPE CARVALHO PEDROSO DE LIMA
ipen.contributor.ipenauthorDUCLERC FERNANDES PARRA
ipen.contributor.ipenauthorWASHINGTON LUIZ OLIANI
ipen.date.recebimento09-10pt_BR
ipen.event.datapadronizada2009pt_BR
ipen.identifier.ipendoc15174pt_BR
ipen.notas.internasProceedingspt_BR
ipen.type.genreArtigo
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relation.isAuthorOfPublication6219076c-1af2-4aec-81db-794291f1d82d
relation.isAuthorOfPublication67996d86-0a59-4ba2-8d38-facaa14e26c3
relation.isAuthorOfPublication9557e5b2-e5fb-4c71-8996-92c12e724a99
relation.isAuthorOfPublication.latestForDiscovery9557e5b2-e5fb-4c71-8996-92c12e724a99
sigepi.autor.atividadeOLIANI, WASHINGTON L.:5821:-1:Spt_BR
sigepi.autor.atividadePARRA, DUCLERC F.:562:740:Npt_BR
sigepi.autor.atividadeLIMA, LUIS F.C.P.:1208:-1:Npt_BR
sigepi.autor.atividadeLUGAO, ADEMAR B.:339:740:Npt_BR
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