Influence of chemical structure of hardener on mechanical and adhesive properties of epoxy polymers

The mechanical and adhesive properties of epoxy formulations based on diglycidyl ether of bisphenol A cured with various aliphatic amines were evaluated in the glass state. Impact and uniaxial compression tests were used to determine the impact energy, elastic modulus and yield stress, respectively....

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Bibliographic Details
Published in:Journal of applied polymer science 2010-08, Vol.117 (4), p.2213-2219
Main Authors: González Garcia, Filiberto, Leyva, Maria Elena, Oliveira, Marcia Gomes, De Queiroz, Alvaro Antonio Alencar, Simões, Alexandre Zirpoli
Format: Article
Language:English
Subjects:
adhesive joint
Adhesives
Application fields
Applied sciences
Bisphenol A
Chemical properties
Elastic modulus
epoxy adhesive
epoxy/amine networks
Ethers
Exact sciences and technology
Flexibility
Modulus of elasticity
Networks
Polymer industry, paints, wood
Properties and testing
Reproduction
Technology of polymers
Yield stress
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Summary:The mechanical and adhesive properties of epoxy formulations based on diglycidyl ether of bisphenol A cured with various aliphatic amines were evaluated in the glass state. Impact and uniaxial compression tests were used to determine the impact energy, elastic modulus and yield stress, respectively. The adhesion tests were carried out in steel-steel joints using single-lap shear, T-peel, and impact adhesive joints geometry. The better mechanical and adhesive behavior of the networks is obtained when exists high flexibility of chain between crosslink and/or high elastic modulus. The 1-(2-aminoethyl)piperazine epoxy network presents the best adhesive properties, high flexibility, and the largest impact energy. However, it possesses low elastic modulus and yield stress. Also, exhibits increases in peel strength and impact energy while reductions in lap shear strength.
ISSN:0021-8995
1097-4628
1097-4628
DOI:10.1002/app.31892