Abstract Resistance to oxidation of a polypropylene (PP) woven geotextile was determined by performing and evaluating various high-pressure autoclave tests (HPAT). Unlike that proposed in the corresponding ISO standard and the majority of HPAT studies published, tests were performed at slightly elevated oxygen pressures (pO2) of up to 500 kPa. Extrapolations were carried out with regard to temperature and oxygen (partial) pressure. The times-till-failure results obtained indicate an Arrhenius dependency with respect to temperature (T) and a reciprocal dependency with respect to oxygen pressure. The relationship found between time-till-failure/service life and the two acceleration factors (T and pO2) is not an empirical one but is based on chemical reactions according to the basic autoxidation scheme. Since the oxygen pressure was monitored in the autoclave during the tests it was possible to directly determine the oxygen consumption rate and not just indirectly as is common practice via the determination of mechanical/physical properties. Furthermore an accelerated oven test was performed and time-till-failure results from both methods were compared.

中文翻译：

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通过应用高温和适度增加氧气压力预测聚丙烯编织土工布的氧化寿命

摘要 聚丙烯 (PP) 编织土工布的抗氧化性是通过执行和评估各种高压高压釜测试 (HPAT) 来确定的。与相应的 ISO 标准和大多数已发表的 HPAT 研究中提出的建议不同，测试是在高达 500 kPa 的略微升高的氧气压力 (pO2) 下进行的。对温度和氧（分）压进行外推。获得的失效时间结果表明，阿伦尼乌斯与温度 (T) 相关，而与氧气压力相关的倒数相关。故障前时间/使用寿命与两个加速因子（T 和 pO2）之间的关系不是经验性的，而是基于基本自动氧化方案的化学反应。由于在测试期间在高压釜中监测氧气压力，因此可以直接确定耗氧率，而不是像通常的做法那样通过确定机械/物理特性间接确定。此外，还进行了加速炉测试，并比较了两种方法的失效时间结果。