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

Gonzalez Prolongo, Margarita and Salom Coll, Catalina and Arribas Arribas, Carmen and Sanchez-Cabezudo Tirado, Marta and Masegosa Fanego, Rosa Maria and 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.

Description

Title: Influence of graphene nanoplatelets on curing and mechanical properties of graphene/epoxy nanocomposites.
Author/s:
  • Gonzalez Prolongo, Margarita
  • Salom Coll, Catalina
  • Arribas Arribas, Carmen
  • Sanchez-Cabezudo Tirado, Marta
  • Masegosa Fanego, Rosa Maria
  • Gonzalez Prolongo, Silvia
Item Type: Article
Título de Revista/Publicación: Journal of Thermal Analysis And Calorimetry
Date: 11 December 2015
ISSN: 1388-6150
Volume: 125
Subjects:
Faculty: E.T.S. de Ingeniería Aeronáutica y del Espacio (UPM)
Department: Materiales y Producción Aeroespacial
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

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.

Funding Projects

TypeCodeAcronymLeaderTitle
Government of SpainMAT2013-46695-C3UnspecifiedUnspecifiedMATERIALES MULTIFUNCIONALES CON NANOESTRUCTURAS DE CARBONO (GRAFENO Y NANOTUBOS): USO COMO MATERIALES COMPUESTOS, ADHESIVOS Y SENSORES ESTRUCTURALES

More information

Item ID: 41222
DC Identifier: http://oa.upm.es/41222/
OAI Identifier: oai:oa.upm.es:41222
DOI: 10.1007/s10973-015-5162-3
Official URL: http://link.springer.com/article/10.1007%2Fs10973-015-5162-3
Deposited by: Memoria Investigacion
Deposited on: 27 Sep 2016 11:12
Last Modified: 06 Jun 2019 17:14
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