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
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/73396
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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 Técnicas2025-09-29T09:40:21Zoai: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:34982025-09-29 09:40:21.429CONICET 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 |
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CONICET Digital (CONICET) |
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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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13.070432 |