SH/T 1542-2023 "Determination of thermal oxidation stability of plastic polypropylene (PP) and propylene copolymers in air heat aging box method" is a Petrochemicals industry standard, which specifies the determination method of thermal oxidation stability of polypropylene (PP) and propylene copolymers in air. By placing the sample in a heat aging box and accelerating the aging under specified conditions, observe the change of the sample Appearance and determine the material failure time. It is suitable for evaluating the thermal oxygen Stability of propylene plastics and estimating the thermal oxygen aging life. This standard is formulated with reference to the international standard ISO 4577-1983 to provide a scientific basis for the thermal oxidation performance testing of plastic materials.