Evaluation methods of out-of-autoclave epoxy prepreg working life used in aerospace application
Prepregs are highly dependent on the resin, its chemical composition, and physical properties. Resin is the perishable part of prepreg materials and usually requires controlled storage, otherwise, its processability and properties may be affected. Oven curing prepregs are recognized to have longer l...
| Autores: | , , , |
|---|---|
| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2024 |
| País: | Brasil |
| Institución: | Universidade Estadual Paulista (UNESP) |
| Repositorio: | Repositório Institucional da UNESP |
| Idioma: | inglés |
| OAI Identifier: | oai:repositorio.unesp.br:11449/309591 |
| Acceso en línea: | http://dx.doi.org/10.1080/10426914.2024.2334679 https://hdl.handle.net/11449/309591 |
| Access Level: | acceso abierto |
| Palabra clave: | out life Out-of-autoclave prepreg physical-chemical properties thermal properties thermosetting resin |
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Evaluation methods of out-of-autoclave epoxy prepreg working life used in aerospace applicationout lifeOut-of-autoclave prepregphysical-chemical propertiesthermal propertiesthermosetting resinPrepregs are highly dependent on the resin, its chemical composition, and physical properties. Resin is the perishable part of prepreg materials and usually requires controlled storage, otherwise, its processability and properties may be affected. Oven curing prepregs are recognized to have longer life out of the freezer than those designed to cure in autoclave, and one of them, prepreg 2511, is the focus of this research. Prepreg 2511 has a formal out-time limit of 28 days at clean room environment (23°C/50% relative humidity), and 24 months shelf life, when frozen at −18°C, while common prepreg designed to be cured in autoclave, usually have 15 days of out-time and 12 months of shelf-life. It is known that the real shelf life and out time of epoxy-based materials tends to be longer than suppliers’ recommendation. Aiming to assess 2511 performance after those 28 days of exposure to clean room ambient, during and after 24 months in freezer; the material was exposed to this environmental condition for more than 28 days and tested periodically using different methods, including, Differential Scanning Calorimeter, High-Performance Liquid Chromatography tack, among others. In resume, the goal of this research was to identify 2511 longest out life without losing its properties and which of the tests used during these experiments would be more sensitive to capture its aging.Research and Development Materials Engineering Department Embraer, São PauloMaterials and Technology Department School of Science and Engineering São Paulo State University (UNESP)Lightweight Structures Laboratory – LEL Instituto de Pesquisas Tecnológicas do Estado de São Paulo-IPTMaterials and Technology Department School of Science and Engineering São Paulo State University (UNESP)EmbraerUniversidade Estadual Paulista (UNESP)Instituto de Pesquisas Tecnológicas do Estado de São Paulo-IPT2025-04-29T20:16:00Z2024-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article1784-1797http://dx.doi.org/10.1080/10426914.2024.2334679Materials and Manufacturing Processes, v. 39, n. 12, p. 1784-1797, 2024.1532-24751042-6914https://hdl.handle.net/11449/30959110.1080/10426914.2024.23346792-s2.0-85189608461Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengMaterials and Manufacturing Processesinfo:eu-repo/semantics/openAccessde Faria Gonzales Leal, Tanila Penteado [UNESP]de Paula Santos, Luis Felipe [UNESP]Leali Costa, Michelle [UNESP]Botelho, Edson Cocchieri [UNESP]2025-04-30T13:33:39Zoai:repositorio.unesp.br:11449/309591Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestrepositoriounesp@unesp.bropendoar:29462025-04-30T13:33:39Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
| dc.title.none.fl_str_mv |
Evaluation methods of out-of-autoclave epoxy prepreg working life used in aerospace application |
| title |
Evaluation methods of out-of-autoclave epoxy prepreg working life used in aerospace application |
| spellingShingle |
Evaluation methods of out-of-autoclave epoxy prepreg working life used in aerospace application de Faria Gonzales Leal, Tanila Penteado [UNESP] out life Out-of-autoclave prepreg physical-chemical properties thermal properties thermosetting resin |
| title_short |
Evaluation methods of out-of-autoclave epoxy prepreg working life used in aerospace application |
| title_full |
Evaluation methods of out-of-autoclave epoxy prepreg working life used in aerospace application |
| title_fullStr |
Evaluation methods of out-of-autoclave epoxy prepreg working life used in aerospace application |
| title_full_unstemmed |
Evaluation methods of out-of-autoclave epoxy prepreg working life used in aerospace application |
| title_sort |
Evaluation methods of out-of-autoclave epoxy prepreg working life used in aerospace application |
| dc.creator.none.fl_str_mv |
de Faria Gonzales Leal, Tanila Penteado [UNESP] de Paula Santos, Luis Felipe [UNESP] Leali Costa, Michelle [UNESP] Botelho, Edson Cocchieri [UNESP] |
| author |
de Faria Gonzales Leal, Tanila Penteado [UNESP] |
| author_facet |
de Faria Gonzales Leal, Tanila Penteado [UNESP] de Paula Santos, Luis Felipe [UNESP] Leali Costa, Michelle [UNESP] Botelho, Edson Cocchieri [UNESP] |
| author_role |
author |
| author2 |
de Paula Santos, Luis Felipe [UNESP] Leali Costa, Michelle [UNESP] Botelho, Edson Cocchieri [UNESP] |
| author2_role |
author author author |
| dc.contributor.none.fl_str_mv |
Embraer Universidade Estadual Paulista (UNESP) Instituto de Pesquisas Tecnológicas do Estado de São Paulo-IPT |
| dc.subject.por.fl_str_mv |
out life Out-of-autoclave prepreg physical-chemical properties thermal properties thermosetting resin |
| topic |
out life Out-of-autoclave prepreg physical-chemical properties thermal properties thermosetting resin |
| description |
Prepregs are highly dependent on the resin, its chemical composition, and physical properties. Resin is the perishable part of prepreg materials and usually requires controlled storage, otherwise, its processability and properties may be affected. Oven curing prepregs are recognized to have longer life out of the freezer than those designed to cure in autoclave, and one of them, prepreg 2511, is the focus of this research. Prepreg 2511 has a formal out-time limit of 28 days at clean room environment (23°C/50% relative humidity), and 24 months shelf life, when frozen at −18°C, while common prepreg designed to be cured in autoclave, usually have 15 days of out-time and 12 months of shelf-life. It is known that the real shelf life and out time of epoxy-based materials tends to be longer than suppliers’ recommendation. Aiming to assess 2511 performance after those 28 days of exposure to clean room ambient, during and after 24 months in freezer; the material was exposed to this environmental condition for more than 28 days and tested periodically using different methods, including, Differential Scanning Calorimeter, High-Performance Liquid Chromatography tack, among others. In resume, the goal of this research was to identify 2511 longest out life without losing its properties and which of the tests used during these experiments would be more sensitive to capture its aging. |
| publishDate |
2024 |
| dc.date.none.fl_str_mv |
2024-01-01 2025-04-29T20:16:00Z |
| 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://dx.doi.org/10.1080/10426914.2024.2334679 Materials and Manufacturing Processes, v. 39, n. 12, p. 1784-1797, 2024. 1532-2475 1042-6914 https://hdl.handle.net/11449/309591 10.1080/10426914.2024.2334679 2-s2.0-85189608461 |
| url |
http://dx.doi.org/10.1080/10426914.2024.2334679 https://hdl.handle.net/11449/309591 |
| identifier_str_mv |
Materials and Manufacturing Processes, v. 39, n. 12, p. 1784-1797, 2024. 1532-2475 1042-6914 10.1080/10426914.2024.2334679 2-s2.0-85189608461 |
| dc.language.iso.fl_str_mv |
eng |
| language |
eng |
| dc.relation.none.fl_str_mv |
Materials and Manufacturing Processes |
| dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
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openAccess |
| dc.format.none.fl_str_mv |
1784-1797 |
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Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
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Universidade Estadual Paulista (UNESP) |
| instacron_str |
UNESP |
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UNESP |
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Repositório Institucional da UNESP |
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Repositório Institucional da UNESP |
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Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
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repositoriounesp@unesp.br |
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1853671805382819840 |
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15,301629 |