Abstract
There are many important aspects of the performance of polymeric coatings, adhesion and fracture are included amongst them. Industry has devised numerous tests for the measurement of adhesive strength and coating toughness, but, all too often, these are ad-hoc and based on end-use. This limits severely any overall value from use of these procedures. In this paper an attempt will be made to consider a more fundamental approach to such matters and, in particular, to establish a technique for measuring procedures for adhesive strength and coating toughness that are independent of shape. In terms of adhesive strength, flexible laminates can be accommodated as well as rigid joints, and as such method of measuring either the interfacial work of fracture or the delamination toughness can be developed. In terms of coating toughness, ductilebrittle characteristics of the coating or surface scratch resistance can investigated. All of these methods are illustrated in the paper.
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