Durability of adhesives based on different epoxy/aliphatic amine networks
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Data
2011-06-01
Autores
Garcia, Filiberto Gonzalez
Leyva, Maria Elena
Alencar de Queiroz, Alvaro Antonio
Simões, Alexandre Zirpoli [UNESP]
Título da Revista
ISSN da Revista
Título de Volume
Editor
Elsevier B.V.
Resumo
The mechanical and adhesives properties of epoxy formulations based on diglycidyl ether of bisphenol A cured with various aliphatic amines were evaluated in the glass state. Impact tests were used to determine the impact energy. The adhesive properties have been evaluated in terms single lap shear using steel adherends. Its durability in water at ambient temperature (24 degrees C) and at 80 degrees C has also been analyzed. The fracture mechanisms were determined by optical microscopy. It was observed a strong participation of the cohesive fracture mechanisms in all epoxy system studied. The 1-(2-aminoethyl)piperazine epoxy adhesive and piperidine epoxy adhesive presents the best adhesive strength and the largest impact energy. The durability in water causes less damage to piperidine epoxy networks. This behavior appears to be associated with the lower water uptake tendency of homopolymerised resins due to its lower hydroxyl group concentration. (C) 2011 Elsevier Ltd. All rights reserved.
Descrição
Palavras-chave
Epoxy adhesives, Steels, Lap shear, Cohesive fracture, Durability
Como citar
International Journal of Adhesion and Adhesives. Oxford: Elsevier B.V., v. 31, n. 4, p. 177-181, 2011.