scope:

This document provides a method for measuring the adhesion energy of most interfaces within the photovoltaic (PV) module laminate. In contrast to other adhesion tests in general use, this method provides a measure of adhesive energy, via the critical energy release rate, and so is more useful for comparing adhesion of different specimen types; e.g. different materials, module or coupon samples, or materials before and after stress exposure. This is a "weakest link" test meaning that the weakest interface is the one most likely to fail in a given test. Adhesion of a specific layer may be difficult to intentionally measure if there is a weaker interface in the system.