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dc.contributor.author
Goyanes, Silvia Nair  
dc.contributor.author
Salgueiro, Walter Alberto  
dc.contributor.author
Somoza, A.  
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Ramos, J.A.  
dc.contributor.author
Mondragon, I.  
dc.date.available
2019-04-08T16:20:16Z  
dc.date.issued
2004-12  
dc.identifier.citation
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  
dc.identifier.issn
0032-3861  
dc.identifier.uri
http://hdl.handle.net/11336/73396  
dc.description.abstract
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.  
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application/pdf  
dc.language.iso
eng  
dc.publisher
Elsevier  
dc.rights
info:eu-repo/semantics/openAccess  
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/  
dc.subject
Chemical Structure  
dc.subject
Epoxy  
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Hardener  
dc.subject.classification
Astronomía  
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Ciencias Físicas  
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CIENCIAS NATURALES Y EXACTAS  
dc.title
Direct relationships between volume variations at macro and nanoscale in epoxy systems. PALS/PVT measurements  
dc.type
info:eu-repo/semantics/article  
dc.type
info:ar-repo/semantics/artículo  
dc.type
info:eu-repo/semantics/publishedVersion  
dc.date.updated
2019-04-05T18:27:13Z  
dc.journal.volume
45  
dc.journal.number
19  
dc.journal.pagination
6691-6697  
dc.journal.pais
Países Bajos  
dc.journal.ciudad
Amsterdam  
dc.description.fil
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  
dc.description.fil
Fil: Salgueiro, Walter Alberto. Ifimat-uncentro Comn. Invest. C.; Argentina  
dc.description.fil
Fil: Somoza, A.. Ifimat-uncentro Comn. Invest. C.; Argentina  
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Fil: Ramos, J.A.. Escuela Universitaria Politécnica;  
dc.description.fil
Fil: Mondragon, I.. Escuela Universitaria Politécnica;  
dc.journal.title
Polymer  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.polymer.2004.07.057