标准摘要
[中文适用范围]： 本文件规定了在空气存在下使用强制通风烘箱测定聚丙烯和丙烯共聚物模制测试样品对热加速老化的抵抗力的方法。 该方法代表了一种估计丙烯塑料零件使用寿命的尝试。 该方法测定的稳定性与材料在不同环境条件下的使用适宜性没有直接关系。 注：规定的热水平被认为足够严重，足以导致商业级热稳定丙烯塑料在合理的时间内失效。 如果需要，可以应用较低的温度来评估具有较低热稳定性的丙烯塑料的性能。 [外文原描述]： 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.
英文名称Plastics — Polypropylene and propylene-copolymers — Determination of thermal oxidative stability in air — Oven method