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Incorporation of an adhesion promoter in a structural adhesive: Aspects of durability and interface chemistry

Sautrot, M, Abel, ML, Watts, JF and Powell, J (2005) Incorporation of an adhesion promoter in a structural adhesive: Aspects of durability and interface chemistry In: 27th Annual Meeting of the Adhesion-Society, 2004-02-15 - 2004-02-18, Wilmington, NC.

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Abstract

The durability and interfacial chemistry of adhesively bonded joints fabricated from clad aluminium alloys (2024-T3) has been investigated using the Boeing wedge-test geometry and XPS analysis. A silane, γ-glycidoxypropyltrimethoxysilane (GPS), has been incorporated directly within the adhesive formulation, and the effect of four different silane concentrations, 0, 0.5, 1, and 2% w/w, have been studied. As expected, the durability of the aluminium joints depends on the silane concentration contained within the adhesive formulation. The mechanical tests carried out showed that a silane concentration lying between 0.5 and 1% w/w would be optimum for the aluminium joints investigated in this work. The failure mode was apparently interfacial but the XPS analysis showed that some fractures occurred partly within the adhesive. The calculations of the C/N ratios from small-area XPS analyses on the adhesive interfacial failure surfaces have provided an indication of the manner in which failure may occur. It has been found that a depletion of curing agent takes place at the region where failure subsequently occurs, leading to a reduction in the mechanical properties at this region within the bond line.

Item Type: Conference or Workshop Item (Paper)
Additional Information: This is an electronic version of an article published in Journal of Adhesion, 81, 163-187 (2005). Journal of Adhesion is available online at: http://www.tandfonline.com/doi/abs/10.1080/00218460590921995
Uncontrolled Keywords: Science & Technology, Technology, Engineering, Chemical, Materials Science, Multidisciplinary, Mechanics, Engineering, Materials Science, ENGINEERING, CHEMICAL, MATERIALS SCIENCE, MULTIDISCIPLINARY, MECHANICS, adhesive, durability, epoxy, silane, XPS, TOF-SIMS, FAILURE, ALUMINUM
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Divisions: Faculty of Engineering and Physical Sciences > Mechanical Engineering Sciences
Depositing User: Symplectic Elements
Date Deposited: 12 Nov 2012 13:39
Last Modified: 08 Oct 2014 10:16
URI: http://epubs.surrey.ac.uk/id/eprint/712617

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