Influence of graphene nanoplatelets on curing and mechanical properties of graphene/epoxy nanocomposites.

Gonzalez Prolongo, Margarita; Salom Coll, Catalina; Arribas Arribas, Carmen; Sanchez-Cabezudo Tirado, Marta; Masegosa Fanego, Rosa Maria y Gonzalez Prolongo, Silvia (2015). Influence of graphene nanoplatelets on curing and mechanical properties of graphene/epoxy nanocomposites.. "Journal of Thermal Analysis And Calorimetry", v. 125 ; pp. 1-8. ISSN 1388-6150. https://doi.org/10.1007/s10973-015-5162-3.

Descripción

Título: Influence of graphene nanoplatelets on curing and mechanical properties of graphene/epoxy nanocomposites.
Autor/es:
  • Gonzalez Prolongo, Margarita
  • Salom Coll, Catalina
  • Arribas Arribas, Carmen
  • Sanchez-Cabezudo Tirado, Marta
  • Masegosa Fanego, Rosa Maria
  • Gonzalez Prolongo, Silvia
Tipo de Documento: Artículo
Título de Revista/Publicación: Journal of Thermal Analysis And Calorimetry
Fecha: 11 Diciembre 2015
Volumen: 125
Materias:
Escuela: E.T.S. de Ingeniería Aeronáutica y del Espacio (UPM)
Departamento: Materiales y Producción Aeroespacial
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

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Resumen

The influence of graphene nanoplatelets (GNPs) on the curing of an epoxy resin based on diglycidyl ether of bisphenol A (DGEBA) and cross-linked with 4,4′ diaminodiphenylmethane (DDM) was studied. Dynamic mechanical properties and tensile properties of the corresponding graphene/epoxy nanocomposites were obtained. Two compositions 1 and 5 mass% of GNPs were studied. The cross-linking reaction of the epoxy resin is accelerated in dispersions with 5 mass% GNPs. In the presence of GNPs, the curing reaction becomes less exothermic, obtaining less perfect epoxy networks compared to neat epoxy (DGEBA–DDM) thermoset. Accordingly, the glass transition temperatures (Tg) of the nanocomposites are lower than that of the neat epoxy thermoset. This effect is not detected for low content of graphene (1 mass%). Protocol of curing having two isothermal steps leads to more perfect networks than the dynamic curing in the DSC. The Tg reduction is minimized in the samples cured through two isothermal steps. The storage moduli of the nanocomposite containing 5 mass% graphene, both in the glassy (T < Tg) and the rubbery (T > Tg) states, are higher than the ones of neat epoxy thermoset, being most pronounced this effect at T > Tg. Tensile tests confirmed the higher elastic moduli of the nanocomposites; however, a decrease in strain at break and tensile strength was observed for the nanocomposite containing 5 mass% of GNPs. This brittle behavior is consistent with the morphology of the samples studied by scanning electron microscopy.

Proyectos asociados

TipoCódigoAcrónimoResponsableTítulo
Gobierno de EspañaMAT2013-46695-C3.Sin especificarSin especificarMATERIALES MULTIFUNCIONALES CON NANOESTRUCTURAS DE CARBONO (GRAFENO Y NANOTUBOS): USO COMO MATERIALES COMPUESTOS, ADHESIVOS Y SENSORES ESTRUCTURALES

Más información

ID de Registro: 41222
Identificador DC: http://oa.upm.es/41222/
Identificador OAI: oai:oa.upm.es:41222
Identificador DOI: 10.1007/s10973-015-5162-3
URL Oficial: http://link.springer.com/article/10.1007%2Fs10973-015-5162-3
Depositado por: Memoria Investigacion
Depositado el: 27 Sep 2016 11:12
Ultima Modificación: 27 Sep 2016 11:12
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