Print Email Facebook Twitter On the adhesion between aluminium and polymers Title On the adhesion between aluminium and polymers Author Van den Brand, J. Contributor De Wit, J.H.W. (promotor) Terryn, H. (promotor) Faculty Design, Engineering and Production Date 2004-10-06 Abstract The aim of this PhD work was to obtain knowledge on the adhesion between polymers and aluminium and the influence of water on this. In the thesis, first a fundamental approach is followed to study adhesion and delamination. A given polymer is simplified to a molecule, having the same, for adhesion relevant, functional groups. This molecule is adsorbed on the aluminium substrate as a monolayer. First, it is investigated how these molecules bond with the aluminium oxide surface. Also, the relation is investigated between the composition and chemistry of the oxide surface and the way this influences bonding. Finally, it is investigated whether the bond is stable in the presence of water. The investigation shows that specifically the hydroxyls (OH) on the oxide surface are crucial for the adhesion between polymers and aluminium. The investigation also shows that the bonds between the polymer and the oxide surface are only limitly stable in the presence of water. Besides the model work, a detailed study was performed of the adhesion between an epoxy coating and an aluminium substrate under the influence of water. The investigation shows that the epoxy/aluminium adhesion is not stable in the presence of water and that already quite rapidly a significant amount of water accumulates at the interface. After the initial loss however, the adhesion recovers and becomes even better than prior to exposure. This is due to the formation of a very thin oxyhydroxide layer on the aluminium substrate, as a result of the reaction between aluminium and water. Finally, based on the knowledge obtained throughout the thesis, two epoxy/aluminium systems were developed which show an improved adhesion and durability. Subject adhesiondelaminationaluminiumpolymersinfrared To reference this document use: http://resolver.tudelft.nl/uuid:90a6787d-aa97-41fc-adf7-f9d978ef5eb6 Publisher Pasmans ISBN 90-77172-10-6 Part of collection Institutional Repository Document type doctoral thesis Rights (c) 2004 J. van den Brand Files PDF dep_brand_20041006.pdf 20.25 MB Close viewer /islandora/object/uuid:90a6787d-aa97-41fc-adf7-f9d978ef5eb6/datastream/OBJ/view