BS EN ISO 4577-1999 塑料.聚丙烯和丙烯共聚物.空气中热氧化稳定性的测定.烘箱法

标准号：BS EN ISO 4577-1999
中文标准名称：塑料.聚丙烯和丙烯共聚物.空气中热氧化稳定性的测定.烘箱法
英文标准名称：Plastics - Polypropylene and propylene-copolymers - Determination of thermal oxidative stability in air - Oven method
标准类型：G31
发布日期：1999/9/15 12:00:00
实施日期：1999/9/15 12:00:00
中国标准分类号：G31
国际标准分类号：83.080.20
适用范围：This International Standard specifies a method for the deter-mination 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 en-vironmental 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.