Nanohole volume dependence on the cure schedule in epoxy thermosetting networks: A PALS study
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...
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| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_00323861_v47_n14_p5066_Salgueiro |
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todo:paper_00323861_v47_n14_p5066_Salgueiro2023-10-03T14:45:13Z Nanohole volume dependence on the cure schedule in epoxy thermosetting networks: A PALS study Salgueiro, W. Ramos, J. Somoza, A. Goyanes, S. Mondragón, I. 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 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. Fil:Goyanes, S. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00323861_v47_n14_p5066_Salgueiro |
| institution |
Universidad de Buenos Aires |
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I-28 |
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R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
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 |
| spellingShingle |
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 Salgueiro, W. Ramos, J. Somoza, A. Goyanes, S. Mondragón, I. Nanohole volume dependence on the cure schedule in epoxy thermosetting networks: A PALS study |
| topic_facet |
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 |
| description |
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. |
| format |
JOUR |
| author |
Salgueiro, W. Ramos, J. Somoza, A. Goyanes, S. Mondragón, I. |
| author_facet |
Salgueiro, W. Ramos, J. Somoza, A. Goyanes, S. Mondragón, I. |
| author_sort |
Salgueiro, W. |
| title |
Nanohole volume dependence on the cure schedule in epoxy thermosetting networks: A PALS study |
| title_short |
Nanohole volume dependence on the cure schedule in epoxy thermosetting networks: A PALS study |
| title_full |
Nanohole volume dependence on the cure schedule in epoxy thermosetting networks: A PALS study |
| title_fullStr |
Nanohole volume dependence on the cure schedule in epoxy thermosetting networks: A PALS study |
| title_full_unstemmed |
Nanohole volume dependence on the cure schedule in epoxy thermosetting networks: A PALS study |
| title_sort |
nanohole volume dependence on the cure schedule in epoxy thermosetting networks: a pals study |
| url |
http://hdl.handle.net/20.500.12110/paper_00323861_v47_n14_p5066_Salgueiro |
| work_keys_str_mv |
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