Interfacial Interaction of Modern Paint Layers

Young, C. R.T. (2007) Interfacial Interaction of Modern Paint Layers. In: Modern Paints Uncovered Symposium, London, UK, 16-19 May 2006, pp. 247-256. ISBN 9780892369065

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This paper reports on experimental work to measure the adhesion, flexibility, and onset of cracking of modern paint layers. The objective was to investigate systematically and in greater detail the most significant findings of previous research into the mechanical characterization of composite paint layers with different media on canvas substrates. First, testing of layered alkyds and acrylics indicates that at low strains the mechanical properties of the composites can be predicted by combining the properties of the individual layers in proportion to their thickness. However, at higher strains this is not the case. After the failure of an alkyd layer, the stiffness is higher than what would be predicted assuming the load was taken by the acrylic layer only. Second, acrylic primings reduce the amount of cracking in the alkyd top layers, appearing to retard their normal brittle behavior. Conversely, failure of alkyd primings occurs but the acrylic top layer remains visually intact. Samples consist of commercially available oil, alkyd, and acrylic primings with subsequent paint layers of different pigments in oil, acrylic, and alkyd media. The priming and paint layers were prepared as composites on canvas and as free films. Mandrel and fold tests were performed to measure flexibility; the tensile force needed to detach the upper paint layer from a composite was used to measure adhesion. Crack initiation/propagation were captured using a CCD. The acquired data will result in a better understanding of interfacial interactions and potential failure modes of modern paint-layer combinations.

Item Type:Conference Proceedings
Glasgow Author(s) Enlighten ID:Young, Professor Christina
Authors: Young, C. R.T.
College/School:College of Arts & Humanities > School of Culture and Creative Arts > History of Art
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