The Effect of Red Pigment and Photo Stabilizers on the Photo Degradation of Polypropylene Films

Detalhes bibliográficos
Autor(a) principal: Cavalcanti,Rebecca Stéfani de Freitas Brito
Data de Publicação: 2019
Outros Autores: Rabello,Marcelo Silveira
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Materials research (São Carlos. Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392019000300215
Resumo: The aim of this work was to evaluate the photo degradation of PP films containing photo stabilizers, a ultraviolet absorber and a hindered amine light stabilizer (HALS), and a red pigment. The films were produced by extrusion and exposed to the UV radiation in the laboratory for up to 15 weeks. The results obtained from FTIR, UV-vis and colorimetry showed that the pigment reduced the rate of chemical degradation both in non-stabilized and photo stabilized films, and the influence was more significant for the combination of pigment and HALS. However, the color shift was more evident when the pigment was present, suggesting that this additive may suffer chemical rearrangements during exposure but do not generate free radicals that can initiate degradation of the polymer. The mechanical properties of the films followed the same trend as the other results, but the unexposed films showed a peculiar behaviour, with much higher tensile strength when the pigments were present. X-ray diffraction and DSC analyses suggested that this might be related to differences in crystal structure.
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spelling The Effect of Red Pigment and Photo Stabilizers on the Photo Degradation of Polypropylene FilmsDegradationpolypropylenepigmentphoto stabilizersThe aim of this work was to evaluate the photo degradation of PP films containing photo stabilizers, a ultraviolet absorber and a hindered amine light stabilizer (HALS), and a red pigment. The films were produced by extrusion and exposed to the UV radiation in the laboratory for up to 15 weeks. The results obtained from FTIR, UV-vis and colorimetry showed that the pigment reduced the rate of chemical degradation both in non-stabilized and photo stabilized films, and the influence was more significant for the combination of pigment and HALS. However, the color shift was more evident when the pigment was present, suggesting that this additive may suffer chemical rearrangements during exposure but do not generate free radicals that can initiate degradation of the polymer. The mechanical properties of the films followed the same trend as the other results, but the unexposed films showed a peculiar behaviour, with much higher tensile strength when the pigments were present. X-ray diffraction and DSC analyses suggested that this might be related to differences in crystal structure.ABM, ABC, ABPol2019-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392019000300215Materials Research v.22 n.3 2019reponame:Materials research (São Carlos. Online)instname:Universidade Federal de São Carlos (UFSCAR)instacron:ABM ABC ABPOL10.1590/1980-5373-mr-2018-0708info:eu-repo/semantics/openAccessCavalcanti,Rebecca Stéfani de Freitas BritoRabello,Marcelo Silveiraeng2019-04-08T00:00:00Zoai:scielo:S1516-14392019000300215Revistahttp://www.scielo.br/mrPUBhttps://old.scielo.br/oai/scielo-oai.phpdedz@power.ufscar.br1980-53731516-1439opendoar:2019-04-08T00:00Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR)false
dc.title.none.fl_str_mv The Effect of Red Pigment and Photo Stabilizers on the Photo Degradation of Polypropylene Films
title The Effect of Red Pigment and Photo Stabilizers on the Photo Degradation of Polypropylene Films
spellingShingle The Effect of Red Pigment and Photo Stabilizers on the Photo Degradation of Polypropylene Films
Cavalcanti,Rebecca Stéfani de Freitas Brito
Degradation
polypropylene
pigment
photo stabilizers
title_short The Effect of Red Pigment and Photo Stabilizers on the Photo Degradation of Polypropylene Films
title_full The Effect of Red Pigment and Photo Stabilizers on the Photo Degradation of Polypropylene Films
title_fullStr The Effect of Red Pigment and Photo Stabilizers on the Photo Degradation of Polypropylene Films
title_full_unstemmed The Effect of Red Pigment and Photo Stabilizers on the Photo Degradation of Polypropylene Films
title_sort The Effect of Red Pigment and Photo Stabilizers on the Photo Degradation of Polypropylene Films
author Cavalcanti,Rebecca Stéfani de Freitas Brito
author_facet Cavalcanti,Rebecca Stéfani de Freitas Brito
Rabello,Marcelo Silveira
author_role author
author2 Rabello,Marcelo Silveira
author2_role author
dc.contributor.author.fl_str_mv Cavalcanti,Rebecca Stéfani de Freitas Brito
Rabello,Marcelo Silveira
dc.subject.por.fl_str_mv Degradation
polypropylene
pigment
photo stabilizers
topic Degradation
polypropylene
pigment
photo stabilizers
description The aim of this work was to evaluate the photo degradation of PP films containing photo stabilizers, a ultraviolet absorber and a hindered amine light stabilizer (HALS), and a red pigment. The films were produced by extrusion and exposed to the UV radiation in the laboratory for up to 15 weeks. The results obtained from FTIR, UV-vis and colorimetry showed that the pigment reduced the rate of chemical degradation both in non-stabilized and photo stabilized films, and the influence was more significant for the combination of pigment and HALS. However, the color shift was more evident when the pigment was present, suggesting that this additive may suffer chemical rearrangements during exposure but do not generate free radicals that can initiate degradation of the polymer. The mechanical properties of the films followed the same trend as the other results, but the unexposed films showed a peculiar behaviour, with much higher tensile strength when the pigments were present. X-ray diffraction and DSC analyses suggested that this might be related to differences in crystal structure.
publishDate 2019
dc.date.none.fl_str_mv 2019-01-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392019000300215
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392019000300215
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/1980-5373-mr-2018-0708
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv ABM, ABC, ABPol
publisher.none.fl_str_mv ABM, ABC, ABPol
dc.source.none.fl_str_mv Materials Research v.22 n.3 2019
reponame:Materials research (São Carlos. Online)
instname:Universidade Federal de São Carlos (UFSCAR)
instacron:ABM ABC ABPOL
instname_str Universidade Federal de São Carlos (UFSCAR)
instacron_str ABM ABC ABPOL
institution ABM ABC ABPOL
reponame_str Materials research (São Carlos. Online)
collection Materials research (São Carlos. Online)
repository.name.fl_str_mv Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR)
repository.mail.fl_str_mv dedz@power.ufscar.br
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