本文件规定了一种使用强制通风烘箱测定聚丙烯和丙烯共聚物模制试样在有空气的情况下耐热加速老化的方法。 该方法试图估算由丙烯塑料制成的零件的使用寿命。 该方法测定的稳定性与材料在不同环境条件下的适用性没有直接关系。 注:规定的热等级被认为足以导致商业级热失效- 在合理的时间内稳定的丙烯塑料。如果需要，可以采用较低的温度来评估热稳定性较低的丙烯塑料的性能。

This document specifies a method for the determination of the resistance of moulded test specimens of polypropylene and propylene-copolymers to accelerated ageing by heat in the presence of air using a forced draught oven. The method represents an attempt to estimate the service life of parts fabricated from propylene plastics. The stability determined by this method is not directly related to the suitability of the material for use when different environmental conditions prevail. NOTE The specified thermal levels are considered sufficiently severe to cause failure of commercial grades of heat-stable propylene plastics within a reasonable period of time. If desired, lower temperatures can be applied to estimate the performance of propylene plastics with lower heat stabilities.