Flexural behavior of Sisal/Castor oil-Based Polyurethane and Sisal/Phenolic Composites
Autor(a) principal: | |
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Data de Publicação: | 2012 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1590/S1516-14392012005000019 http://hdl.handle.net/11449/9441 |
Resumo: | Natural fibers used as reinforcement of polymeric composites are interesting research subjects in polymer technology. Nowadays, these materials are being considered as a way to reinforce timber structures improvement. Fibers with larger structural applications are glass and carbon fibers, however, the use of natural fibers is an economic alternative and present many advantages such as biodegradability and having its origin from a renewable source. Castor oil, a triglyceride vegetable with hydroxyl groups, was reacted with 4,4' methylene diphenyl diisocyanate (MDI) to produce the polyurethane matrix. The composites were prepared by compress molding at room temperature using woven sisal fiber as a reinforcement, with and without thermal treatment (at 60 ºC for 72 hours) to the fabrics before the composites molding process. The present paper presents the preparation and a flexural caracterization of sisal/polyurethane and sisal/phenolic composites by using the three-point bending. The sisal fibers moisture content influence on the flexural behaviour was also analyzed. Experimental results showed a higher stiffness for the sisal/phenolic composite (11.2 MPa) followed by the sisal/polyurethane (3.7 MPa), respectively. |
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Flexural behavior of Sisal/Castor oil-Based Polyurethane and Sisal/Phenolic Compositesflexural behaviorcastor oil-based polyurethanesisal fiberpolymeric compositeNatural fibers used as reinforcement of polymeric composites are interesting research subjects in polymer technology. Nowadays, these materials are being considered as a way to reinforce timber structures improvement. Fibers with larger structural applications are glass and carbon fibers, however, the use of natural fibers is an economic alternative and present many advantages such as biodegradability and having its origin from a renewable source. Castor oil, a triglyceride vegetable with hydroxyl groups, was reacted with 4,4' methylene diphenyl diisocyanate (MDI) to produce the polyurethane matrix. The composites were prepared by compress molding at room temperature using woven sisal fiber as a reinforcement, with and without thermal treatment (at 60 ºC for 72 hours) to the fabrics before the composites molding process. The present paper presents the preparation and a flexural caracterization of sisal/polyurethane and sisal/phenolic composites by using the three-point bending. The sisal fibers moisture content influence on the flexural behaviour was also analyzed. Experimental results showed a higher stiffness for the sisal/phenolic composite (11.2 MPa) followed by the sisal/polyurethane (3.7 MPa), respectively.Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Fundação para o Desenvolvimento da UNESP (FUNDUNESP)Universidade Estadual Paulista Departamento de Materiais e Tecnologia, Grupo de Fadiga e Materiais Aeronáuticos Faculdade de Engenharia de GuaratinguetáUniversidade Estadual Paulista Departamento de Materiais e Tecnologia, Grupo de Fadiga e Materiais Aeronáuticos Faculdade de Engenharia de GuaratinguetáFUNDUNESP: 00576/06CNPq: 134015/2005-3CNPq: 310215/2006-4ABM, ABC, ABPolUniversidade Estadual Paulista (Unesp)Milanese, Andressa Cecília [UNESP]Cioffi, Maria Odila Hilário [UNESP]Voorwald, Herman Jacobus Cornelis [UNESP]2014-05-20T13:28:23Z2014-05-20T13:28:23Z2012-04-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article191-197application/pdfhttp://dx.doi.org/10.1590/S1516-14392012005000019Materials Research. ABM, ABC, ABPol, v. 15, n. 2, p. 191-197, 2012.1516-1439http://hdl.handle.net/11449/944110.1590/S1516-14392012005000019S1516-14392012000200004WOS:000305716000004S1516-14392012000200004.pdf61196710144161263511534795805776SciELOreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengMaterials Research1.1030,398info:eu-repo/semantics/openAccess2024-07-02T15:04:15Zoai:repositorio.unesp.br:11449/9441Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-07-02T15:04:15Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Flexural behavior of Sisal/Castor oil-Based Polyurethane and Sisal/Phenolic Composites |
title |
Flexural behavior of Sisal/Castor oil-Based Polyurethane and Sisal/Phenolic Composites |
spellingShingle |
Flexural behavior of Sisal/Castor oil-Based Polyurethane and Sisal/Phenolic Composites Milanese, Andressa Cecília [UNESP] flexural behavior castor oil-based polyurethane sisal fiber polymeric composite |
title_short |
Flexural behavior of Sisal/Castor oil-Based Polyurethane and Sisal/Phenolic Composites |
title_full |
Flexural behavior of Sisal/Castor oil-Based Polyurethane and Sisal/Phenolic Composites |
title_fullStr |
Flexural behavior of Sisal/Castor oil-Based Polyurethane and Sisal/Phenolic Composites |
title_full_unstemmed |
Flexural behavior of Sisal/Castor oil-Based Polyurethane and Sisal/Phenolic Composites |
title_sort |
Flexural behavior of Sisal/Castor oil-Based Polyurethane and Sisal/Phenolic Composites |
author |
Milanese, Andressa Cecília [UNESP] |
author_facet |
Milanese, Andressa Cecília [UNESP] Cioffi, Maria Odila Hilário [UNESP] Voorwald, Herman Jacobus Cornelis [UNESP] |
author_role |
author |
author2 |
Cioffi, Maria Odila Hilário [UNESP] Voorwald, Herman Jacobus Cornelis [UNESP] |
author2_role |
author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Milanese, Andressa Cecília [UNESP] Cioffi, Maria Odila Hilário [UNESP] Voorwald, Herman Jacobus Cornelis [UNESP] |
dc.subject.por.fl_str_mv |
flexural behavior castor oil-based polyurethane sisal fiber polymeric composite |
topic |
flexural behavior castor oil-based polyurethane sisal fiber polymeric composite |
description |
Natural fibers used as reinforcement of polymeric composites are interesting research subjects in polymer technology. Nowadays, these materials are being considered as a way to reinforce timber structures improvement. Fibers with larger structural applications are glass and carbon fibers, however, the use of natural fibers is an economic alternative and present many advantages such as biodegradability and having its origin from a renewable source. Castor oil, a triglyceride vegetable with hydroxyl groups, was reacted with 4,4' methylene diphenyl diisocyanate (MDI) to produce the polyurethane matrix. The composites were prepared by compress molding at room temperature using woven sisal fiber as a reinforcement, with and without thermal treatment (at 60 ºC for 72 hours) to the fabrics before the composites molding process. The present paper presents the preparation and a flexural caracterization of sisal/polyurethane and sisal/phenolic composites by using the three-point bending. The sisal fibers moisture content influence on the flexural behaviour was also analyzed. Experimental results showed a higher stiffness for the sisal/phenolic composite (11.2 MPa) followed by the sisal/polyurethane (3.7 MPa), respectively. |
publishDate |
2012 |
dc.date.none.fl_str_mv |
2012-04-01 2014-05-20T13:28:23Z 2014-05-20T13:28:23Z |
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/10.1590/S1516-14392012005000019 Materials Research. ABM, ABC, ABPol, v. 15, n. 2, p. 191-197, 2012. 1516-1439 http://hdl.handle.net/11449/9441 10.1590/S1516-14392012005000019 S1516-14392012000200004 WOS:000305716000004 S1516-14392012000200004.pdf 6119671014416126 3511534795805776 |
url |
http://dx.doi.org/10.1590/S1516-14392012005000019 http://hdl.handle.net/11449/9441 |
identifier_str_mv |
Materials Research. ABM, ABC, ABPol, v. 15, n. 2, p. 191-197, 2012. 1516-1439 10.1590/S1516-14392012005000019 S1516-14392012000200004 WOS:000305716000004 S1516-14392012000200004.pdf 6119671014416126 3511534795805776 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Materials Research 1.103 0,398 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
191-197 application/pdf |
dc.publisher.none.fl_str_mv |
ABM, ABC, ABPol |
publisher.none.fl_str_mv |
ABM, ABC, ABPol |
dc.source.none.fl_str_mv |
SciELO reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1803650196547043328 |