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Título: | Optimization of the curing and post-curing conditions for the manufacturing of partially bio-based epoxy resins with improved toughness |
Autor: | Lascano, Diego; Quiles-Carrillo, Luis; Torres-Giner, Sergio; Boronat, Teodomiro; Montanes, Néstor | Palabras clave: | Bio-based thermosets Post-curing Gel time Mechanical properties |
Fecha de publicación: | 15-ago-2019 | Editor: | Multidisciplinary Digital Publishing Institute | Citación: | Polymers 11(8): 1354 (2019) | Resumen: | This research deals with the influence of different curing and post-curing temperatures on the mechanical and thermomechanical properties as well as the gel time of an epoxy resin prepared by the reaction of diglycidyl ether of bisphenol A (DGEBA) with an amine hardener and a reactive diluent derived from plants at 31 wt %. The highest performance was obtained for the resins cured at moderate-to-high temperatures, that is, 80 ∘C and 90 ∘C , which additionally showed a significant reduction in the gel time. This effect was ascribed to the formation of a stronger polymer network by an extended cross-linking process of the polymer chains during the resin manufacturing. Furthermore, post-curing at either 125 ∘C or 150 ∘C yielded thermosets with higher mechanical strength and, more interestingly, improved toughness, particularly for the samples previously cured at moderate temperatures. In particular, the partially bio-based epoxy resin cured at 80 ∘C and post-cured at 150 ∘C for 1 h and 30 min, respectively, showed the most balanced performance due to the formation of a more homogeneous cross-linked structure. | Descripción: | © The Author(s). | Versión del editor: | https://doi.org/10.3390/polym11081354 | URI: | http://hdl.handle.net/10261/188964 | DOI: | 10.3390/polym11081354 | E-ISSN: | 2073-4360 |
Aparece en las colecciones: | (IATA) Artículos |
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Optimization_Lascano_Art2019.pdf | 3,66 MB | Adobe PDF | Visualizar/Abrir |
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