Effect of Post-Cure on the Static and Viscoelastic Properties of a Polyester Resin
Autor(a) principal: | |
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Data de Publicação: | 2020 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10316/106634 https://doi.org/10.3390/polym12091927 |
Resumo: | This work intends to study the effect of the curing parameters on the mechanical properties of a polyester resin without a complete curing reaction process. For this purpose, cures at room temperature, 40 °C, and 60 °C, and post-cures at 40 °C and 60 °C, with different exposure times, were considered. Three-point bending tests were performed to assess the bending properties and both stress relaxation and creep behavior. The degree of crosslinking was estimated by evaluating the C = C ester bond, by Fourier infrared spectroscopy and complemented with the thermal characterization made by differential scanning calorimetry. The results showed that higher curing temperatures are preferable to methods involving curing and post-curing, which can be confirmed by the higher degree of conversion of unsaturated ester bonds at 60 °C. Compared to the resin cured at room temperature, the bending strength increased by 36.5% at 40 °C and 88.6% at 60 °C. A similar effect was observed for bending stiffness. In terms of stress relaxation and creep strain, the lowest values were obtained for samples cured at 60 °C. |
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Effect of Post-Cure on the Static and Viscoelastic Properties of a Polyester Resinpolyester resinpost-curemechanical propertiesmechanical testingThis work intends to study the effect of the curing parameters on the mechanical properties of a polyester resin without a complete curing reaction process. For this purpose, cures at room temperature, 40 °C, and 60 °C, and post-cures at 40 °C and 60 °C, with different exposure times, were considered. Three-point bending tests were performed to assess the bending properties and both stress relaxation and creep behavior. The degree of crosslinking was estimated by evaluating the C = C ester bond, by Fourier infrared spectroscopy and complemented with the thermal characterization made by differential scanning calorimetry. The results showed that higher curing temperatures are preferable to methods involving curing and post-curing, which can be confirmed by the higher degree of conversion of unsaturated ester bonds at 60 °C. Compared to the resin cured at room temperature, the bending strength increased by 36.5% at 40 °C and 88.6% at 60 °C. A similar effect was observed for bending stiffness. In terms of stress relaxation and creep strain, the lowest values were obtained for samples cured at 60 °C.MDPI2020-08-26info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://hdl.handle.net/10316/106634http://hdl.handle.net/10316/106634https://doi.org/10.3390/polym12091927eng2073-4360Silva, Marco P.Santos, PauloParente, João M.Valvez, SaraReis, Paulo N. B.Piedade, A. P.info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-04-13T10:13:44Zoai:estudogeral.uc.pt:10316/106634Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T21:23:03.380918Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Effect of Post-Cure on the Static and Viscoelastic Properties of a Polyester Resin |
title |
Effect of Post-Cure on the Static and Viscoelastic Properties of a Polyester Resin |
spellingShingle |
Effect of Post-Cure on the Static and Viscoelastic Properties of a Polyester Resin Silva, Marco P. polyester resin post-cure mechanical properties mechanical testing |
title_short |
Effect of Post-Cure on the Static and Viscoelastic Properties of a Polyester Resin |
title_full |
Effect of Post-Cure on the Static and Viscoelastic Properties of a Polyester Resin |
title_fullStr |
Effect of Post-Cure on the Static and Viscoelastic Properties of a Polyester Resin |
title_full_unstemmed |
Effect of Post-Cure on the Static and Viscoelastic Properties of a Polyester Resin |
title_sort |
Effect of Post-Cure on the Static and Viscoelastic Properties of a Polyester Resin |
author |
Silva, Marco P. |
author_facet |
Silva, Marco P. Santos, Paulo Parente, João M. Valvez, Sara Reis, Paulo N. B. Piedade, A. P. |
author_role |
author |
author2 |
Santos, Paulo Parente, João M. Valvez, Sara Reis, Paulo N. B. Piedade, A. P. |
author2_role |
author author author author author |
dc.contributor.author.fl_str_mv |
Silva, Marco P. Santos, Paulo Parente, João M. Valvez, Sara Reis, Paulo N. B. Piedade, A. P. |
dc.subject.por.fl_str_mv |
polyester resin post-cure mechanical properties mechanical testing |
topic |
polyester resin post-cure mechanical properties mechanical testing |
description |
This work intends to study the effect of the curing parameters on the mechanical properties of a polyester resin without a complete curing reaction process. For this purpose, cures at room temperature, 40 °C, and 60 °C, and post-cures at 40 °C and 60 °C, with different exposure times, were considered. Three-point bending tests were performed to assess the bending properties and both stress relaxation and creep behavior. The degree of crosslinking was estimated by evaluating the C = C ester bond, by Fourier infrared spectroscopy and complemented with the thermal characterization made by differential scanning calorimetry. The results showed that higher curing temperatures are preferable to methods involving curing and post-curing, which can be confirmed by the higher degree of conversion of unsaturated ester bonds at 60 °C. Compared to the resin cured at room temperature, the bending strength increased by 36.5% at 40 °C and 88.6% at 60 °C. A similar effect was observed for bending stiffness. In terms of stress relaxation and creep strain, the lowest values were obtained for samples cured at 60 °C. |
publishDate |
2020 |
dc.date.none.fl_str_mv |
2020-08-26 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10316/106634 http://hdl.handle.net/10316/106634 https://doi.org/10.3390/polym12091927 |
url |
http://hdl.handle.net/10316/106634 https://doi.org/10.3390/polym12091927 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
2073-4360 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.publisher.none.fl_str_mv |
MDPI |
publisher.none.fl_str_mv |
MDPI |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
instname_str |
Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
instacron_str |
RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
repository.mail.fl_str_mv |
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1799134118715326464 |