The thermal stability of a polypropylene copolymer has been examined at several stages during the processing of the material
into its final product in order to obtain information on the influence of processing steps such as grinding and thermal heating
on the expected lifetime of the material. Mass loss kinetics in an inert atmosphere were able to detect differences in thermal
stability, but oxidative differential scanning calorimetry studies proved to be a more sensitive techiique. A comparative
study of a specially prepared series of samples revealed the importance of additives on measured thermal stability and indicated
that both mechanical and thermal processing can cause reduction in measured thermal stability.