Direct relationships between volume variations at macro and nanoscale in epoxy systems. PALS/PVT measurements

Autores
Goyanes, Silvia Nair; Salgueiro, Walter Alberto; Somoza, A.; Ramos, J.A.; Mondragon, I.
Año de publicación
2004
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The free volume in epoxy systems fully cured with aminic hardeners having different chemical structures was studied by means of positron annihilation lifetimes spectroscopy. The results are compared with those obtained from the analysis of the macroscopic specific volume changes by using pressure-volume-temperature experimental technique. An excellent correlation between the volumes measured at macro and nanoscales was found. From this fact, it can be asserted that the variation of the specific volume is mainly controlled by the variation in the average size of sub-nanometer size local free volumes, which are fixed by the chemical structure of hardener in fully crosslinked epoxy networks. These results give the first evidence of the direct relation existing between macro and nanoscales in thermosetting networks. © 2004 Elsevier Ltd. All rights reserved.
Fil: Goyanes, Silvia Nair. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Física de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Física de Buenos Aires; Argentina
Fil: Salgueiro, Walter Alberto. Ifimat-uncentro Comn. Invest. C.; Argentina
Fil: Somoza, A.. Ifimat-uncentro Comn. Invest. C.; Argentina
Fil: Ramos, J.A.. Escuela Universitaria Politécnica;
Fil: Mondragon, I.. Escuela Universitaria Politécnica;
Materia
Chemical Structure
Epoxy
Hardener
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/73396
Acceder
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network_name_str CONICET Digital (CONICET)
spelling Direct relationships between volume variations at macro and nanoscale in epoxy systems. PALS/PVT measurementsGoyanes, Silvia NairSalgueiro, Walter AlbertoSomoza, A.Ramos, J.A.Mondragon, I.Chemical StructureEpoxyHardenerhttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1The free volume in epoxy systems fully cured with aminic hardeners having different chemical structures was studied by means of positron annihilation lifetimes spectroscopy. The results are compared with those obtained from the analysis of the macroscopic specific volume changes by using pressure-volume-temperature experimental technique. An excellent correlation between the volumes measured at macro and nanoscales was found. From this fact, it can be asserted that the variation of the specific volume is mainly controlled by the variation in the average size of sub-nanometer size local free volumes, which are fixed by the chemical structure of hardener in fully crosslinked epoxy networks. These results give the first evidence of the direct relation existing between macro and nanoscales in thermosetting networks. © 2004 Elsevier Ltd. All rights reserved.Fil: Goyanes, Silvia Nair. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Física de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Física de Buenos Aires; ArgentinaFil: Salgueiro, Walter Alberto. Ifimat-uncentro Comn. Invest. C.; ArgentinaFil: Somoza, A.. Ifimat-uncentro Comn. Invest. C.; ArgentinaFil: Ramos, J.A.. Escuela Universitaria Politécnica;Fil: Mondragon, I.. Escuela Universitaria Politécnica;Elsevier2004-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/73396Goyanes, Silvia Nair; Salgueiro, Walter Alberto; Somoza, A.; Ramos, J.A.; Mondragon, I.; Direct relationships between volume variations at macro and nanoscale in epoxy systems. PALS/PVT measurements; Elsevier; Polymer; 45; 19; 12-2004; 6691-66970032-3861CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.polymer.2004.07.057info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T11:08:56Zoai:ri.conicet.gov.ar:11336/73396instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-10-22 11:08:57.148CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Direct relationships between volume variations at macro and nanoscale in epoxy systems. PALS/PVT measurements
title Direct relationships between volume variations at macro and nanoscale in epoxy systems. PALS/PVT measurements
spellingShingle Direct relationships between volume variations at macro and nanoscale in epoxy systems. PALS/PVT measurements
Goyanes, Silvia Nair
Chemical Structure
Epoxy
Hardener
title_short Direct relationships between volume variations at macro and nanoscale in epoxy systems. PALS/PVT measurements
title_full Direct relationships between volume variations at macro and nanoscale in epoxy systems. PALS/PVT measurements
title_fullStr Direct relationships between volume variations at macro and nanoscale in epoxy systems. PALS/PVT measurements
title_full_unstemmed Direct relationships between volume variations at macro and nanoscale in epoxy systems. PALS/PVT measurements
title_sort Direct relationships between volume variations at macro and nanoscale in epoxy systems. PALS/PVT measurements
dc.creator.none.fl_str_mv Goyanes, Silvia Nair
Salgueiro, Walter Alberto
Somoza, A.
Ramos, J.A.
Mondragon, I.
author Goyanes, Silvia Nair
author_facet Goyanes, Silvia Nair
Salgueiro, Walter Alberto
Somoza, A.
Ramos, J.A.
Mondragon, I.
author_role author
author2 Salgueiro, Walter Alberto
Somoza, A.
Ramos, J.A.
Mondragon, I.
author2_role author
author
author
author
dc.subject.none.fl_str_mv Chemical Structure
Epoxy
Hardener
topic Chemical Structure
Epoxy
Hardener
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv The free volume in epoxy systems fully cured with aminic hardeners having different chemical structures was studied by means of positron annihilation lifetimes spectroscopy. The results are compared with those obtained from the analysis of the macroscopic specific volume changes by using pressure-volume-temperature experimental technique. An excellent correlation between the volumes measured at macro and nanoscales was found. From this fact, it can be asserted that the variation of the specific volume is mainly controlled by the variation in the average size of sub-nanometer size local free volumes, which are fixed by the chemical structure of hardener in fully crosslinked epoxy networks. These results give the first evidence of the direct relation existing between macro and nanoscales in thermosetting networks. © 2004 Elsevier Ltd. All rights reserved.
Fil: Goyanes, Silvia Nair. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Física de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Física de Buenos Aires; Argentina
Fil: Salgueiro, Walter Alberto. Ifimat-uncentro Comn. Invest. C.; Argentina
Fil: Somoza, A.. Ifimat-uncentro Comn. Invest. C.; Argentina
Fil: Ramos, J.A.. Escuela Universitaria Politécnica;
Fil: Mondragon, I.. Escuela Universitaria Politécnica;
description The free volume in epoxy systems fully cured with aminic hardeners having different chemical structures was studied by means of positron annihilation lifetimes spectroscopy. The results are compared with those obtained from the analysis of the macroscopic specific volume changes by using pressure-volume-temperature experimental technique. An excellent correlation between the volumes measured at macro and nanoscales was found. From this fact, it can be asserted that the variation of the specific volume is mainly controlled by the variation in the average size of sub-nanometer size local free volumes, which are fixed by the chemical structure of hardener in fully crosslinked epoxy networks. These results give the first evidence of the direct relation existing between macro and nanoscales in thermosetting networks. © 2004 Elsevier Ltd. All rights reserved.
publishDate 2004
dc.date.none.fl_str_mv 2004-12
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/11336/73396
Goyanes, Silvia Nair; Salgueiro, Walter Alberto; Somoza, A.; Ramos, J.A.; Mondragon, I.; Direct relationships between volume variations at macro and nanoscale in epoxy systems. PALS/PVT measurements; Elsevier; Polymer; 45; 19; 12-2004; 6691-6697
0032-3861
CONICET Digital
CONICET
url http://hdl.handle.net/11336/73396
identifier_str_mv Goyanes, Silvia Nair; Salgueiro, Walter Alberto; Somoza, A.; Ramos, J.A.; Mondragon, I.; Direct relationships between volume variations at macro and nanoscale in epoxy systems. PALS/PVT measurements; Elsevier; Polymer; 45; 19; 12-2004; 6691-6697
0032-3861
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1016/j.polymer.2004.07.057
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 12.982451

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