Effect of the hardener to epoxy monomer ratio on the water absorption behavior of the DGEBA/TETA epoxy system

Detalhes bibliográficos
Autor(a) principal: Pereira,Ayrton Alef Castanheira
Data de Publicação: 2016
Outros Autores: d’Almeida,José Roberto Moraes
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Polímeros (São Carlos. Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0104-14282016000100005
Resumo: Abstract The water absorption behavior of the DGEBA/TETA epoxy system was evaluated as a function of the epoxy monomer to amine hardener ratio. Weight gain versus immersion time curves were obtained and the experimental points were fitted using Fickian and Non-Fickian diffusion models. The results obtained showed that for all epoxy monomer to hardener ratios analyzed water diffusion followed non-Fickian behavior. It was possible to correlate the water absorption behavior to the macromolecular structure developed when the epoxy/ hardener ratio was varied. All epoxy/hardener ratios present a two-phase macromolecular structure, composed of regions with high crosslink density and regions with lower crosslinking. Epoxy rich systems have a more open macromolecular structure with a lower fraction of the dense phase than the amine rich systems, which present a more compact two-phase structure.
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spelling Effect of the hardener to epoxy monomer ratio on the water absorption behavior of the DGEBA/TETA epoxy systemwater absorptionepoxy resinshardener to epoxy monomer ratioAbstract The water absorption behavior of the DGEBA/TETA epoxy system was evaluated as a function of the epoxy monomer to amine hardener ratio. Weight gain versus immersion time curves were obtained and the experimental points were fitted using Fickian and Non-Fickian diffusion models. The results obtained showed that for all epoxy monomer to hardener ratios analyzed water diffusion followed non-Fickian behavior. It was possible to correlate the water absorption behavior to the macromolecular structure developed when the epoxy/ hardener ratio was varied. All epoxy/hardener ratios present a two-phase macromolecular structure, composed of regions with high crosslink density and regions with lower crosslinking. Epoxy rich systems have a more open macromolecular structure with a lower fraction of the dense phase than the amine rich systems, which present a more compact two-phase structure.Associação Brasileira de Polímeros2016-03-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0104-14282016000100005Polímeros v.26 n.1 2016reponame:Polímeros (São Carlos. Online)instname:Associação Brasileira de Polímeros (ABPol)instacron:ABPO10.1590/0104-1428.2106info:eu-repo/semantics/openAccessPereira,Ayrton Alef Castanheirad’Almeida,José Roberto Moraeseng2016-12-16T00:00:00Zoai:scielo:S0104-14282016000100005Revistahttp://www.scielo.br/pohttps://old.scielo.br/oai/scielo-oai.php||revista@abpol.org.br1678-51690104-1428opendoar:2016-12-16T00:00Polímeros (São Carlos. Online) - Associação Brasileira de Polímeros (ABPol)false
dc.title.none.fl_str_mv Effect of the hardener to epoxy monomer ratio on the water absorption behavior of the DGEBA/TETA epoxy system
title Effect of the hardener to epoxy monomer ratio on the water absorption behavior of the DGEBA/TETA epoxy system
spellingShingle Effect of the hardener to epoxy monomer ratio on the water absorption behavior of the DGEBA/TETA epoxy system
Pereira,Ayrton Alef Castanheira
water absorption
epoxy resins
hardener to epoxy monomer ratio
title_short Effect of the hardener to epoxy monomer ratio on the water absorption behavior of the DGEBA/TETA epoxy system
title_full Effect of the hardener to epoxy monomer ratio on the water absorption behavior of the DGEBA/TETA epoxy system
title_fullStr Effect of the hardener to epoxy monomer ratio on the water absorption behavior of the DGEBA/TETA epoxy system
title_full_unstemmed Effect of the hardener to epoxy monomer ratio on the water absorption behavior of the DGEBA/TETA epoxy system
title_sort Effect of the hardener to epoxy monomer ratio on the water absorption behavior of the DGEBA/TETA epoxy system
author Pereira,Ayrton Alef Castanheira
author_facet Pereira,Ayrton Alef Castanheira
d’Almeida,José Roberto Moraes
author_role author
author2 d’Almeida,José Roberto Moraes
author2_role author
dc.contributor.author.fl_str_mv Pereira,Ayrton Alef Castanheira
d’Almeida,José Roberto Moraes
dc.subject.por.fl_str_mv water absorption
epoxy resins
hardener to epoxy monomer ratio
topic water absorption
epoxy resins
hardener to epoxy monomer ratio
description Abstract The water absorption behavior of the DGEBA/TETA epoxy system was evaluated as a function of the epoxy monomer to amine hardener ratio. Weight gain versus immersion time curves were obtained and the experimental points were fitted using Fickian and Non-Fickian diffusion models. The results obtained showed that for all epoxy monomer to hardener ratios analyzed water diffusion followed non-Fickian behavior. It was possible to correlate the water absorption behavior to the macromolecular structure developed when the epoxy/ hardener ratio was varied. All epoxy/hardener ratios present a two-phase macromolecular structure, composed of regions with high crosslink density and regions with lower crosslinking. Epoxy rich systems have a more open macromolecular structure with a lower fraction of the dense phase than the amine rich systems, which present a more compact two-phase structure.
publishDate 2016
dc.date.none.fl_str_mv 2016-03-01
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=S0104-14282016000100005
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0104-14282016000100005
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/0104-1428.2106
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 Associação Brasileira de Polímeros
publisher.none.fl_str_mv Associação Brasileira de Polímeros
dc.source.none.fl_str_mv Polímeros v.26 n.1 2016
reponame:Polímeros (São Carlos. Online)
instname:Associação Brasileira de Polímeros (ABPol)
instacron:ABPO
instname_str Associação Brasileira de Polímeros (ABPol)
instacron_str ABPO
institution ABPO
reponame_str Polímeros (São Carlos. Online)
collection Polímeros (São Carlos. Online)
repository.name.fl_str_mv Polímeros (São Carlos. Online) - Associação Brasileira de Polímeros (ABPol)
repository.mail.fl_str_mv ||revista@abpol.org.br
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