Photodegradation Mechanisms on Poly(ε-caprolactone) (PCL)

Detalhes bibliográficos
Autor(a) principal: França,Danyelle Campos
Data de Publicação: 2018
Outros Autores: Morais,Dayanne Diniz, Bezerra,Elieber Barros, Araújo,Edcleide Maria, Wellen,Renate Maria Ramos
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=S1516-14392018000500210
Resumo: Photodegradation of PCL was performed exposing injected specimens to ultraviolet radiation (UV-B) up to 9 weeks. Photodegradated PCL specimens were tested by Differential Scanning Calorimetry (DSC), Infrared Spectroscopy (FTIR), mechanical properties, Optical Microscopy (MO) and Scanning Electron Microscopy (SEM).Upon exposure decrease in elongation at break and increase of elastic modulus were verified, higher degree of crystallinity was observed for longer exposure what can be due to the chemi-crystallization mechanism. From IR spectra new carbonyl group (C=O) peaks were observed. Presence of micro cracks on specimens’ surface was identified by MO. From morphological analyses is suggested that the photodegradation in PCL takes place by bulk erosion mechanism.
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spelling Photodegradation Mechanisms on Poly(ε-caprolactone) (PCL)PCLPhododegradationChemi-crystallizationBulk erosionPhotodegradation of PCL was performed exposing injected specimens to ultraviolet radiation (UV-B) up to 9 weeks. Photodegradated PCL specimens were tested by Differential Scanning Calorimetry (DSC), Infrared Spectroscopy (FTIR), mechanical properties, Optical Microscopy (MO) and Scanning Electron Microscopy (SEM).Upon exposure decrease in elongation at break and increase of elastic modulus were verified, higher degree of crystallinity was observed for longer exposure what can be due to the chemi-crystallization mechanism. From IR spectra new carbonyl group (C=O) peaks were observed. Presence of micro cracks on specimens’ surface was identified by MO. From morphological analyses is suggested that the photodegradation in PCL takes place by bulk erosion mechanism.ABM, ABC, ABPol2018-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392018000500210Materials Research v.21 n.5 2018reponame:Materials research (São Carlos. Online)instname:Universidade Federal de São Carlos (UFSCAR)instacron:ABM ABC ABPOL10.1590/1980-5373-mr-2017-0837info:eu-repo/semantics/openAccessFrança,Danyelle CamposMorais,Dayanne DinizBezerra,Elieber BarrosAraújo,Edcleide MariaWellen,Renate Maria Ramoseng2018-07-13T00:00:00Zoai:scielo:S1516-14392018000500210Revistahttp://www.scielo.br/mrPUBhttps://old.scielo.br/oai/scielo-oai.phpdedz@power.ufscar.br1980-53731516-1439opendoar:2018-07-13T00:00Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR)false
dc.title.none.fl_str_mv Photodegradation Mechanisms on Poly(ε-caprolactone) (PCL)
title Photodegradation Mechanisms on Poly(ε-caprolactone) (PCL)
spellingShingle Photodegradation Mechanisms on Poly(ε-caprolactone) (PCL)
França,Danyelle Campos
PCL
Phododegradation
Chemi-crystallization
Bulk erosion
title_short Photodegradation Mechanisms on Poly(ε-caprolactone) (PCL)
title_full Photodegradation Mechanisms on Poly(ε-caprolactone) (PCL)
title_fullStr Photodegradation Mechanisms on Poly(ε-caprolactone) (PCL)
title_full_unstemmed Photodegradation Mechanisms on Poly(ε-caprolactone) (PCL)
title_sort Photodegradation Mechanisms on Poly(ε-caprolactone) (PCL)
author França,Danyelle Campos
author_facet França,Danyelle Campos
Morais,Dayanne Diniz
Bezerra,Elieber Barros
Araújo,Edcleide Maria
Wellen,Renate Maria Ramos
author_role author
author2 Morais,Dayanne Diniz
Bezerra,Elieber Barros
Araújo,Edcleide Maria
Wellen,Renate Maria Ramos
author2_role author
author
author
author
dc.contributor.author.fl_str_mv França,Danyelle Campos
Morais,Dayanne Diniz
Bezerra,Elieber Barros
Araújo,Edcleide Maria
Wellen,Renate Maria Ramos
dc.subject.por.fl_str_mv PCL
Phododegradation
Chemi-crystallization
Bulk erosion
topic PCL
Phododegradation
Chemi-crystallization
Bulk erosion
description Photodegradation of PCL was performed exposing injected specimens to ultraviolet radiation (UV-B) up to 9 weeks. Photodegradated PCL specimens were tested by Differential Scanning Calorimetry (DSC), Infrared Spectroscopy (FTIR), mechanical properties, Optical Microscopy (MO) and Scanning Electron Microscopy (SEM).Upon exposure decrease in elongation at break and increase of elastic modulus were verified, higher degree of crystallinity was observed for longer exposure what can be due to the chemi-crystallization mechanism. From IR spectra new carbonyl group (C=O) peaks were observed. Presence of micro cracks on specimens’ surface was identified by MO. From morphological analyses is suggested that the photodegradation in PCL takes place by bulk erosion mechanism.
publishDate 2018
dc.date.none.fl_str_mv 2018-01-01
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=S1516-14392018000500210
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392018000500210
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/1980-5373-mr-2017-0837
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.21 n.5 2018
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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