Natural rubber foams with anisotropic cellular structures: Mechanical properties and modeling
Autor(a) principal: | |
---|---|
Data de Publicação: | 2016 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1016/j.indcrop.2015.10.050 http://hdl.handle.net/11449/168155 |
Resumo: | Natural rubber foams are biobased and lightweight products which have found their main field of application in comfort products such as mattresses and pillows. They are generally produced from chemical foaming processes in which the expansion of the polymer is isotropic and hence, their properties are not directionally dependent. However, this dependency could be interesting for certain structural and thermal insulating applications. In this work, elastomeric foams based on natural rubber with a medium relative density (around 0.3) and with varied cellular structures in terms of the shape anisotropy ratio of the cells were produced by a chemical foaming process in which expansion was restricted to only one direction inside a mold. The use of solid precursors of different dimensions, the elastomeric properties of natural rubber and the crosslinking by sulfur of the polymer matrix during foaming allowed foams to be obtained with anisotropy ratios between 0.90 and 2.48 at the same density and with the same properties as the polymeric matrix. In this particular case the study was focused on analysing their compressive modulus and its relationship with the anisotropy of the cellular structure by employing analytical models generally used to describe the mechanical behavior of anisotropic foams. |
id |
UNSP_e36ca87fc3acfaa73525a1da1ee888e1 |
---|---|
oai_identifier_str |
oai:repositorio.unesp.br:11449/168155 |
network_acronym_str |
UNSP |
network_name_str |
Repositório Institucional da UNESP |
repository_id_str |
2946 |
spelling |
Natural rubber foams with anisotropic cellular structures: Mechanical properties and modelingAnisotropyBiopolymerCross-linkedFoamsNatural rubberNatural rubber foams are biobased and lightweight products which have found their main field of application in comfort products such as mattresses and pillows. They are generally produced from chemical foaming processes in which the expansion of the polymer is isotropic and hence, their properties are not directionally dependent. However, this dependency could be interesting for certain structural and thermal insulating applications. In this work, elastomeric foams based on natural rubber with a medium relative density (around 0.3) and with varied cellular structures in terms of the shape anisotropy ratio of the cells were produced by a chemical foaming process in which expansion was restricted to only one direction inside a mold. The use of solid precursors of different dimensions, the elastomeric properties of natural rubber and the crosslinking by sulfur of the polymer matrix during foaming allowed foams to be obtained with anisotropy ratios between 0.90 and 2.48 at the same density and with the same properties as the polymeric matrix. In this particular case the study was focused on analysing their compressive modulus and its relationship with the anisotropy of the cellular structure by employing analytical models generally used to describe the mechanical behavior of anisotropic foams.Cellular Materials Laboratory CellMat Condensed Matter Physics Department University of Valladolid, Paseo de Belén 7Faculdade de Ciências e Tecnologia UNESP-Universidade Estadual Paulista, Rua Roberto Simonsen, 305Ministério da Ciência Tecnologia e Inovação-MCTI, Rua: Esplanada dos Ministérios, Bloco E, 01Faculdade de Ciências e Tecnologia UNESP-Universidade Estadual Paulista, Rua Roberto Simonsen, 305University of ValladolidUniversidade Estadual Paulista (Unesp)Tecnologia e Inovação-MCTIOliveira-Salmazo, Leandra [UNESP]Lopez-Gil, AlbertoSilva-Bellucci, FelipeJob, Aldo E. [UNESP]Rodriguez-Perez, Miguel A.2018-12-11T16:39:59Z2018-12-11T16:39:59Z2016-02-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article26-35application/pdfhttp://dx.doi.org/10.1016/j.indcrop.2015.10.050Industrial Crops and Products, v. 80, p. 26-35.0926-6690http://hdl.handle.net/11449/16815510.1016/j.indcrop.2015.10.0502-s2.0-849477210962-s2.0-84947721096.pdfScopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengIndustrial Crops and Products1,091info:eu-repo/semantics/openAccess2023-10-30T06:08:48Zoai:repositorio.unesp.br:11449/168155Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462023-10-30T06:08:48Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Natural rubber foams with anisotropic cellular structures: Mechanical properties and modeling |
title |
Natural rubber foams with anisotropic cellular structures: Mechanical properties and modeling |
spellingShingle |
Natural rubber foams with anisotropic cellular structures: Mechanical properties and modeling Oliveira-Salmazo, Leandra [UNESP] Anisotropy Biopolymer Cross-linked Foams Natural rubber |
title_short |
Natural rubber foams with anisotropic cellular structures: Mechanical properties and modeling |
title_full |
Natural rubber foams with anisotropic cellular structures: Mechanical properties and modeling |
title_fullStr |
Natural rubber foams with anisotropic cellular structures: Mechanical properties and modeling |
title_full_unstemmed |
Natural rubber foams with anisotropic cellular structures: Mechanical properties and modeling |
title_sort |
Natural rubber foams with anisotropic cellular structures: Mechanical properties and modeling |
author |
Oliveira-Salmazo, Leandra [UNESP] |
author_facet |
Oliveira-Salmazo, Leandra [UNESP] Lopez-Gil, Alberto Silva-Bellucci, Felipe Job, Aldo E. [UNESP] Rodriguez-Perez, Miguel A. |
author_role |
author |
author2 |
Lopez-Gil, Alberto Silva-Bellucci, Felipe Job, Aldo E. [UNESP] Rodriguez-Perez, Miguel A. |
author2_role |
author author author author |
dc.contributor.none.fl_str_mv |
University of Valladolid Universidade Estadual Paulista (Unesp) Tecnologia e Inovação-MCTI |
dc.contributor.author.fl_str_mv |
Oliveira-Salmazo, Leandra [UNESP] Lopez-Gil, Alberto Silva-Bellucci, Felipe Job, Aldo E. [UNESP] Rodriguez-Perez, Miguel A. |
dc.subject.por.fl_str_mv |
Anisotropy Biopolymer Cross-linked Foams Natural rubber |
topic |
Anisotropy Biopolymer Cross-linked Foams Natural rubber |
description |
Natural rubber foams are biobased and lightweight products which have found their main field of application in comfort products such as mattresses and pillows. They are generally produced from chemical foaming processes in which the expansion of the polymer is isotropic and hence, their properties are not directionally dependent. However, this dependency could be interesting for certain structural and thermal insulating applications. In this work, elastomeric foams based on natural rubber with a medium relative density (around 0.3) and with varied cellular structures in terms of the shape anisotropy ratio of the cells were produced by a chemical foaming process in which expansion was restricted to only one direction inside a mold. The use of solid precursors of different dimensions, the elastomeric properties of natural rubber and the crosslinking by sulfur of the polymer matrix during foaming allowed foams to be obtained with anisotropy ratios between 0.90 and 2.48 at the same density and with the same properties as the polymeric matrix. In this particular case the study was focused on analysing their compressive modulus and its relationship with the anisotropy of the cellular structure by employing analytical models generally used to describe the mechanical behavior of anisotropic foams. |
publishDate |
2016 |
dc.date.none.fl_str_mv |
2016-02-01 2018-12-11T16:39:59Z 2018-12-11T16:39:59Z |
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/10.1016/j.indcrop.2015.10.050 Industrial Crops and Products, v. 80, p. 26-35. 0926-6690 http://hdl.handle.net/11449/168155 10.1016/j.indcrop.2015.10.050 2-s2.0-84947721096 2-s2.0-84947721096.pdf |
url |
http://dx.doi.org/10.1016/j.indcrop.2015.10.050 http://hdl.handle.net/11449/168155 |
identifier_str_mv |
Industrial Crops and Products, v. 80, p. 26-35. 0926-6690 10.1016/j.indcrop.2015.10.050 2-s2.0-84947721096 2-s2.0-84947721096.pdf |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Industrial Crops and Products 1,091 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
26-35 application/pdf |
dc.source.none.fl_str_mv |
Scopus 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_ |
1803649568489865216 |