A model for the dependence of the electrical conductance with the applied stress in insulating-conducting composites

Autores
Negri, R.M.; Rodriguez, S.D.; Bernik, D.L.; Molina, F.V.; Pilosof, A.; Perez, O.
Año de publicación
2010
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
A model for the dependence of the electrical conductance, G, with the strain induced by external mechanical stress in conducting particles-polymer composites is presented. The model assumes that the percolation probability between neighboring particles must depart from a scale-invariant behavior but saturate at moderated-high strains, reaching percolation path's saturation, with sigmoid dependence. This dependence is obtained by proposing a dynamic picture where contacts or bonds between neighboring particles are created but also destructed when a stress is applied and relatively moderated or high strains, ε, are produced in the composite. The electrical conductance of prepared graphite-polydimethylsiloxane composites were measured as function of the applied pressure and fitted by the presented model. The elastic response to the uniaxial compression was studied using a texture analyzer. The possibility of nonuniversal effects in the conduction critical exponent, t, was taken into account. It is concluded that the saturation of the response in the G versus ε plots cannot be assigned to nonuniversal behavior of the exponent t, or to saturation of the elastic response. On the other hand, the presented model accounts for all the main experimental features observed in these systems and for previously reported data of elastomer composites. The simulated behavior of the piezoresistivity coefficient is also in qualitative agreement with previous reports. © 2010 American Institute of Physics.
Fil:Negri, R.M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.
Fil:Rodriguez, S.D. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.
Fil:Bernik, D.L. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.
Fil:Molina, F.V. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.
Fil:Pilosof, A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.
Fil:Perez, O. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.
Fuente
J Appl Phys 2010;107(11)
Materia
Applied pressure
Applied stress
Conducting composites
Conducting particles
Critical exponent
Elastic response
Elastomer composites
Electrical conductance
High strains
Mechanical stress
Nonuniversal effects
Percolation path
Percolation probability
Piezoresistivity coefficient
Polymer composite
Scale-invariant
Simulated behaviors
Texture analyzers
Uni-axial compression
Electric conductance
Silicones
Solvents
Strain
Stresses
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by/2.5/ar
Repositorio
Biblioteca Digital (UBA-FCEN)
Institución
Universidad Nacional de Buenos Aires. Facultad de Ciencias Exactas y Naturales
OAI Identificador
paperaa:paper_00218979_v107_n11_p_Negri
Acceder
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oai_identifier_str paperaa:paper_00218979_v107_n11_p_Negri
network_acronym_str BDUBAFCEN
repository_id_str 1896
network_name_str Biblioteca Digital (UBA-FCEN)
spelling A model for the dependence of the electrical conductance with the applied stress in insulating-conducting compositesNegri, R.M.Rodriguez, S.D.Bernik, D.L.Molina, F.V.Pilosof, A.Perez, O.Applied pressureApplied stressConducting compositesConducting particlesCritical exponentElastic responseElastomer compositesElectrical conductanceHigh strainsMechanical stressNonuniversal effectsPercolation pathPercolation probabilityPiezoresistivity coefficientPolymer compositeScale-invariantSimulated behaviorsTexture analyzersUni-axial compressionElectric conductanceSiliconesSolventsStrainStressesA model for the dependence of the electrical conductance, G, with the strain induced by external mechanical stress in conducting particles-polymer composites is presented. The model assumes that the percolation probability between neighboring particles must depart from a scale-invariant behavior but saturate at moderated-high strains, reaching percolation path's saturation, with sigmoid dependence. This dependence is obtained by proposing a dynamic picture where contacts or bonds between neighboring particles are created but also destructed when a stress is applied and relatively moderated or high strains, ε, are produced in the composite. The electrical conductance of prepared graphite-polydimethylsiloxane composites were measured as function of the applied pressure and fitted by the presented model. The elastic response to the uniaxial compression was studied using a texture analyzer. The possibility of nonuniversal effects in the conduction critical exponent, t, was taken into account. It is concluded that the saturation of the response in the G versus ε plots cannot be assigned to nonuniversal behavior of the exponent t, or to saturation of the elastic response. On the other hand, the presented model accounts for all the main experimental features observed in these systems and for previously reported data of elastomer composites. The simulated behavior of the piezoresistivity coefficient is also in qualitative agreement with previous reports. © 2010 American Institute of Physics.Fil:Negri, R.M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.Fil:Rodriguez, S.D. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.Fil:Bernik, D.L. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.Fil:Molina, F.V. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.Fil:Pilosof, A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.Fil:Perez, O. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.2010info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfhttp://hdl.handle.net/20.500.12110/paper_00218979_v107_n11_p_NegriJ Appl Phys 2010;107(11)reponame:Biblioteca Digital (UBA-FCEN)instname:Universidad Nacional de Buenos Aires. Facultad de Ciencias Exactas y Naturalesinstacron:UBA-FCENenginfo:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by/2.5/ar2026-02-26T11:42:47Zpaperaa:paper_00218979_v107_n11_p_NegriInstitucionalhttps://digital.bl.fcen.uba.ar/Universidad públicaNo correspondehttps://digital.bl.fcen.uba.ar/cgi-bin/oaiserver.cgiana@bl.fcen.uba.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:18962026-02-26 11:42:48.757Biblioteca Digital (UBA-FCEN) - Universidad Nacional de Buenos Aires. Facultad de Ciencias Exactas y Naturalesfalse
dc.title.none.fl_str_mv A model for the dependence of the electrical conductance with the applied stress in insulating-conducting composites
title A model for the dependence of the electrical conductance with the applied stress in insulating-conducting composites
spellingShingle A model for the dependence of the electrical conductance with the applied stress in insulating-conducting composites
Negri, R.M.
Applied pressure
Applied stress
Conducting composites
Conducting particles
Critical exponent
Elastic response
Elastomer composites
Electrical conductance
High strains
Mechanical stress
Nonuniversal effects
Percolation path
Percolation probability
Piezoresistivity coefficient
Polymer composite
Scale-invariant
Simulated behaviors
Texture analyzers
Uni-axial compression
Electric conductance
Silicones
Solvents
Strain
Stresses
title_short A model for the dependence of the electrical conductance with the applied stress in insulating-conducting composites
title_full A model for the dependence of the electrical conductance with the applied stress in insulating-conducting composites
title_fullStr A model for the dependence of the electrical conductance with the applied stress in insulating-conducting composites
title_full_unstemmed A model for the dependence of the electrical conductance with the applied stress in insulating-conducting composites
title_sort A model for the dependence of the electrical conductance with the applied stress in insulating-conducting composites
dc.creator.none.fl_str_mv Negri, R.M.
Rodriguez, S.D.
Bernik, D.L.
Molina, F.V.
Pilosof, A.
Perez, O.
author Negri, R.M.
author_facet Negri, R.M.
Rodriguez, S.D.
Bernik, D.L.
Molina, F.V.
Pilosof, A.
Perez, O.
author_role author
author2 Rodriguez, S.D.
Bernik, D.L.
Molina, F.V.
Pilosof, A.
Perez, O.
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Applied pressure
Applied stress
Conducting composites
Conducting particles
Critical exponent
Elastic response
Elastomer composites
Electrical conductance
High strains
Mechanical stress
Nonuniversal effects
Percolation path
Percolation probability
Piezoresistivity coefficient
Polymer composite
Scale-invariant
Simulated behaviors
Texture analyzers
Uni-axial compression
Electric conductance
Silicones
Solvents
Strain
Stresses
topic Applied pressure
Applied stress
Conducting composites
Conducting particles
Critical exponent
Elastic response
Elastomer composites
Electrical conductance
High strains
Mechanical stress
Nonuniversal effects
Percolation path
Percolation probability
Piezoresistivity coefficient
Polymer composite
Scale-invariant
Simulated behaviors
Texture analyzers
Uni-axial compression
Electric conductance
Silicones
Solvents
Strain
Stresses
dc.description.none.fl_txt_mv A model for the dependence of the electrical conductance, G, with the strain induced by external mechanical stress in conducting particles-polymer composites is presented. The model assumes that the percolation probability between neighboring particles must depart from a scale-invariant behavior but saturate at moderated-high strains, reaching percolation path's saturation, with sigmoid dependence. This dependence is obtained by proposing a dynamic picture where contacts or bonds between neighboring particles are created but also destructed when a stress is applied and relatively moderated or high strains, ε, are produced in the composite. The electrical conductance of prepared graphite-polydimethylsiloxane composites were measured as function of the applied pressure and fitted by the presented model. The elastic response to the uniaxial compression was studied using a texture analyzer. The possibility of nonuniversal effects in the conduction critical exponent, t, was taken into account. It is concluded that the saturation of the response in the G versus ε plots cannot be assigned to nonuniversal behavior of the exponent t, or to saturation of the elastic response. On the other hand, the presented model accounts for all the main experimental features observed in these systems and for previously reported data of elastomer composites. The simulated behavior of the piezoresistivity coefficient is also in qualitative agreement with previous reports. © 2010 American Institute of Physics.
Fil:Negri, R.M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.
Fil:Rodriguez, S.D. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.
Fil:Bernik, D.L. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.
Fil:Molina, F.V. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.
Fil:Pilosof, A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.
Fil:Perez, O. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.
description A model for the dependence of the electrical conductance, G, with the strain induced by external mechanical stress in conducting particles-polymer composites is presented. The model assumes that the percolation probability between neighboring particles must depart from a scale-invariant behavior but saturate at moderated-high strains, reaching percolation path's saturation, with sigmoid dependence. This dependence is obtained by proposing a dynamic picture where contacts or bonds between neighboring particles are created but also destructed when a stress is applied and relatively moderated or high strains, ε, are produced in the composite. The electrical conductance of prepared graphite-polydimethylsiloxane composites were measured as function of the applied pressure and fitted by the presented model. The elastic response to the uniaxial compression was studied using a texture analyzer. The possibility of nonuniversal effects in the conduction critical exponent, t, was taken into account. It is concluded that the saturation of the response in the G versus ε plots cannot be assigned to nonuniversal behavior of the exponent t, or to saturation of the elastic response. On the other hand, the presented model accounts for all the main experimental features observed in these systems and for previously reported data of elastomer composites. The simulated behavior of the piezoresistivity coefficient is also in qualitative agreement with previous reports. © 2010 American Institute of Physics.
publishDate 2010
dc.date.none.fl_str_mv 2010
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/20.500.12110/paper_00218979_v107_n11_p_Negri
url http://hdl.handle.net/20.500.12110/paper_00218979_v107_n11_p_Negri
dc.language.none.fl_str_mv eng
language eng
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by/2.5/ar
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by/2.5/ar
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv J Appl Phys 2010;107(11)
reponame:Biblioteca Digital (UBA-FCEN)
instname:Universidad Nacional de Buenos Aires. Facultad de Ciencias Exactas y Naturales
instacron:UBA-FCEN
reponame_str Biblioteca Digital (UBA-FCEN)
collection Biblioteca Digital (UBA-FCEN)
instname_str Universidad Nacional de Buenos Aires. Facultad de Ciencias Exactas y Naturales
instacron_str UBA-FCEN
institution UBA-FCEN
repository.name.fl_str_mv Biblioteca Digital (UBA-FCEN) - Universidad Nacional de Buenos Aires. Facultad de Ciencias Exactas y Naturales
repository.mail.fl_str_mv ana@bl.fcen.uba.ar
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score 13.176822

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