Durability of adhesives based on different epoxy/aliphatic amine networks

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 u...

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Bibliographic Details
Published in:International journal of adhesion and adhesives 2011-06, Vol.31 (4), p.177-181
Main Authors: González Garcia, Filiberto, Leyva, Maria Elena, Queiroz, Alvaro Antonio Alencar de, Simões, Alexandre Zirpoli
Format: Article
Language:English
Subjects:
Adhesives
Aliphatic amines
Application fields
Applied sciences
Cohesive fracture
Durability
Epoxy adhesives
Exact sciences and technology
Fracture mechanics
Fracture toughness
Fracturing
Hydroxyl groups
Lap shear
Networks
Piperidine
Polymer industry, paints, wood
Steels
Technology of polymers
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Summary: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 °C) and at 80 °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.
ISSN:0143-7496
1879-0127
DOI:10.1016/j.ijadhadh.2011.01.002