Artículo
Nanohole volume dependence on the cure schedule in epoxy thermosetting networks: A PALS study
Salgueiro, Walter Alberto; Ramos, J.; Somoza, Alberto Horacio
; Goyanes, Silvia Nair
; Mondragón, Silvina Andrea
Fecha de publicación:
12/2006
Editorial:
Elsevier
Revista:
Polymer
ISSN:
0032-3861
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
A systematic study on the dependence of the volumes at nanoscale in epoxy systems cured with two selected aminic hardeners at different pre-cure temperatures is presented. Nanohole volumes were measured by positron annihilation lifetime spectroscopy. Additional information regarding the structure of the thermosets was obtained using dynamic mechanical analysis. Volume results obtained are discussed in terms of the cure schedule applied to the epoxy systems, their characteristic glass transition temperatures and their crosslink density. The pre-cure temperature and the structure of the hardeners govern the packing of the molecular chains of the epoxy network. Using together positron and mechanical experimental techniques allows to conclude that a strong change in the volume and number density of the nanoholes takes place when the pre-cure temperature crosses the glass transition temperature of the systems. © 2006 Elsevier Ltd. All rights reserved.
Palabras clave:
Cure Schedule
,
Epoxy
,
Hardener
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Identificadores
Colecciones
Articulos(IFIBA)
Articulos de INST.DE FISICA DE BUENOS AIRES
Articulos de INST.DE FISICA DE BUENOS AIRES
Citación
Salgueiro, Walter Alberto; Ramos, J.; Somoza, Alberto Horacio; Goyanes, Silvia Nair; Mondragón, Silvina Andrea; Nanohole volume dependence on the cure schedule in epoxy thermosetting networks: A PALS study; Elsevier; Polymer; 47; 14; 12-2006; 5066-5070
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