scope:

This part of IEC/TS 61244 reviews experimental techniques to quantitatively monitor the effects when oxygen is present during ageing of polymers in various environments including temperature, radiation or ultraviolet. Inhomogenous ageing effects caused by diffusion-limited oxidation are often encountered and provide theoretical equations to estimate their importance. These effects make it difficult to understand the ageing process and to extrapolate accelerated exposure to long-term conditions. It is widely known that mechanical properties degrade prioto to electrical properties.These changes are consequenses of chemical changes such as oxidation.In this technical specification, only mechanical or chemical monitoring techniques are of interest