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Abstract:

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.

Registro:

Documento: Artículo
Título:Nanohole volume dependence on the cure schedule in epoxy thermosetting networks: A PALS study
Autor:Salgueiro, W.; Ramos, J.; Somoza, A.; Goyanes, S.; Mondragón, I.
Filiación:Instituto de Física de Materiales Tandil (IFIMAT), Universidad Nacional, Centro de la Provincia de Buenos Aires, Pinto 399, B7000GHG Tandil, Argentina
MaterialsTechnology Group, Departamento de Ingeniería Química y M. Ambiente, Escuela Univ. Politécnica, Pz. Europa 1, 20018 Donostia/, San Sebastián, Spain
Comisión de Investigaciones Científicas de la Provincia de Buenos Aires, Calle 526 e/10 y 11, 1900 La Plata, Argentina
LPMPyMC, Depto. de Física, Facultad de Ciencias Exactas y Naturales, Ciudad Universitaria, Pabellon I, 1428 Buenos Aires, Argentina
CONICET, Buenos Aires, Argentina
Palabras clave:Cure schedule; Epoxy; Hardener; Crosslinking; Epoxy resins; Glass transition; Positrons; Thermal effects; Cure schedule; Epoxy; Epoxy systems; Hardener; Thermosets; cross linking; curing; glass transition temperature; temperature effect; thermosetting polymer; thermosetting property
Año:2006
Volumen:47
Número:14
Página de inicio:5066
Página de fin:5070
DOI: http://dx.doi.org/10.1016/j.polymer.2006.05.032
Título revista:Polymer
Título revista abreviado:Polymer
ISSN:00323861
CODEN:POLMA
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00323861_v47_n14_p5066_Salgueiro

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Citas:

---------- APA ----------
Salgueiro, W., Ramos, J., Somoza, A., Goyanes, S. & Mondragón, I. (2006) . Nanohole volume dependence on the cure schedule in epoxy thermosetting networks: A PALS study. Polymer, 47(14), 5066-5070.
http://dx.doi.org/10.1016/j.polymer.2006.05.032
---------- CHICAGO ----------
Salgueiro, W., Ramos, J., Somoza, A., Goyanes, S., Mondragón, I. "Nanohole volume dependence on the cure schedule in epoxy thermosetting networks: A PALS study" . Polymer 47, no. 14 (2006) : 5066-5070.
http://dx.doi.org/10.1016/j.polymer.2006.05.032
---------- MLA ----------
Salgueiro, W., Ramos, J., Somoza, A., Goyanes, S., Mondragón, I. "Nanohole volume dependence on the cure schedule in epoxy thermosetting networks: A PALS study" . Polymer, vol. 47, no. 14, 2006, pp. 5066-5070.
http://dx.doi.org/10.1016/j.polymer.2006.05.032
---------- VANCOUVER ----------
Salgueiro, W., Ramos, J., Somoza, A., Goyanes, S., Mondragón, I. Nanohole volume dependence on the cure schedule in epoxy thermosetting networks: A PALS study. Polymer. 2006;47(14):5066-5070.
http://dx.doi.org/10.1016/j.polymer.2006.05.032