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Discoloration of historical plastic objects

2021-07-12Artigo científico Acesso aberto
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dc.contributor.authorMicheluz, Anna
dc.contributor.authorAngelin, Eva Mariasole
dc.contributor.authorLopes, João Almeida
dc.contributor.authorMelo, Maria João
dc.contributor.authorPamplona, Marisa
dc.contributor.institutionLAQV@REQUIMTE
dc.contributor.institutionDCR - Departamento de Conservação e Restauro
dc.contributor.pblMDPI - Multidisciplinary Digital Publishing Institute
dc.date.accessioned2022-02-12T23:27:33Z
dc.date.available2022-02-12T23:27:33Z
dc.date.issued2021-07-12
dc.descriptionFunding Information: This research was funded by Funda??o para a Ci?ncia e a Tecnologia, Minist?rio da Ci?ncia Tecnologia e Ensino Superior (FCT/MCTES), Portugal, through doctoral programme CORESPD/00253/2012, PB/BD/114412/2016 doctoral grant. Associate Laboratory for Green Chemistry? LAQV,(PTDC/IVC-HFC/5174/2014). Publisher Copyright: © 2021 by the authors. Licensee MDPI, Basel, Switzerland.
dc.description.abstractLight is a determining factor in the discoloration of plastics, and photodegradation processes can affect the molecular structures of both the polymer and colorants. Limited studies focused on the discoloration of heritage plastics in conservation science. This work investigated the discoloration of red historical polyethylene (PE) objects colored with PR 48:2 and PR 53:1. High-density and low-density PE reference polymers, neat pigment powders, and historical samples were assessed before and after accelerated photoaging. The applied methodology provided insight into the individual light-susceptibility of polyethylenes, organic pigment lakes, and their combined effect in the photoaging of historical plastic formulations. After light exposure, both PE references and historical samples yellowed, PR53:1 faded, and PR 48:2 darkened; however, both organic pigments faded severely in the historical samples. This highlights the role played by the plastic binder likely facilitating the pigment photofading. Fourier transform infrared spectroscopy and mass spectrometry techniques—EGA-MS, PY-GC/MS, and TD-GC/MS—were successfully employed for characterizing the plastic formulations and degradation. The identification of phthalic compounds in both aged β-naphthol powders opens new venues for studies on their degradation. This work’s approach and analytical methods in studying the discoloration of historical plastics are novel, proving their efficacy, reliability, and potentiality.en
dc.description.versionpublishersversion
dc.description.versionpublished
dc.format.extent3838366
dc.identifier.doi10.3390/polym13142278
dc.identifier.otherPURE: 40915272
dc.identifier.otherPURE UUID: ce9abc22-b989-458b-9573-b141f05caf33
dc.identifier.otherScopus: 85110836298
dc.identifier.otherPubMed: 34301037
dc.identifier.otherPubMedCentral: PMC8309268
dc.identifier.otherWOS: 000676960100001
dc.identifier.otherORCID: /0000-0001-7393-6801/work/108074527
dc.identifier.urihttp://hdl.handle.net/10362/132800
dc.identifier.urlhttps://www.scopus.com/pages/publications/85110836298
dc.language.isoeng
dc.peerreviewedyes
dc.relationFunding Information: info:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F50006%2F2020/PT
dc.relationinfo:eu-repo/grantAgreement/FCT/3599-PPCDT/PTDC%2FIVC-HFC%2F5174%2F2014/PT
dc.relationThis research was funded by Fundação para a Ciência e a Tecnologia, Ministério da Ciência Tecnologia e Ensino Superior (FCT/MCTES), Portugal, through doctoral programme CORES-PD/00253/2012, PB/BD/114412/2016. info:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F50006%2F2020/PT
dc.relationinfo:eu-repo/grantAgreement/FCT/3599-PPCDT/PTDC%2FIVC-HFC%2F5174%2F2014/PT
dc.relationTHE TRIUMPH OF BAKELITE - CONTRIBUTIONS FOR A HISTORY OF PLASTICS IN PORTUGAL
dc.subjectATR-FTIR
dc.subjectColorant degradation
dc.subjectDiscoloration
dc.subjectEGA-MS
dc.subjectFading
dc.subjectHistorical plastic objects
dc.subjectPhotodegradation
dc.subjectPy-GC/MS
dc.subjectTD-GC/MS
dc.subjectβ-naphthol pigment lakes
dc.subjectGeneral Chemistry
dc.subjectPolymers and Plastics
dc.titleDiscoloration of historical plastic objectsen
dc.title.subtitleNew insight into the degradation of β-naphthol pigment lakesen
dc.typejournal article
degois.publication.issue14
degois.publication.titlePolymers
degois.publication.volume13
dspace.entity.typePublication
oaire.awardNumberPTDC/IVC-HFC/5174/2014
oaire.awardTitleTHE TRIUMPH OF BAKELITE - CONTRIBUTIONS FOR A HISTORY OF PLASTICS IN PORTUGAL
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/3599-PPCDT/PTDC%2FIVC-HFC%2F5174%2F2014/PT
oaire.fundingStream3599-PPCDT
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsopenAccess
relation.isProjectOfPublicationba15a201-f6db-4f84-9f17-4c9e0fa36f01
relation.isProjectOfPublication.latestForDiscoveryba15a201-f6db-4f84-9f17-4c9e0fa36f01

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