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首页> 外文期刊>Journal of Applied Polymer Science >Evaluation of aging behavior of medium density polyethylene in natural environment by principal component analysis
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Evaluation of aging behavior of medium density polyethylene in natural environment by principal component analysis

机译：主成分分析法评估中密度聚乙烯在自然环境中的老化行为

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摘要

To evaluate the aging behavior of medium density polyethylene (MDPE) under aggressive environment, principal component analysis (PCA) method was used to establish a nondimensional expression Z from a data set of multiple properties of MDPE. Natural exposure tests of MDPE were carried out for one year with different test periods at Xisha islands in China. Surface properties and mechanical properties of MDPE were measured. It was found that Z increased stepwise with exposure time extending. Combined with the climatic data in Xisha islands, the shielding effect of the oxidation products generated by the degradation process or the reactivating effect resulting from changes of weather conditions were alternatively executed as the determinant factor to affect the change tendency of Z. In a word, Z can be used to reveal the comprehensive degradation pattern of MDPE in natural environments in a reasonable way.
机译：为了评估侵蚀性环境下中密度聚乙烯（MDPE）的老化行为，使用主成分分析（PCA）方法从MDPE多个属性的数据集中建立了无量纲表达式Z。 MDPE的自然暴露测试在中国的西沙群岛进行了为期一年的测试，测试期不同。测量了MDPE的表面性质和机械性质。发现随着曝光时间的延长，Z逐步增加。结合西沙群岛的气候数据，交替执行降解过程产生的氧化产物的屏蔽效应或天气条件变化产生的活化效应，作为影响Z变化趋势的决定性因素。 Z可以合理方式揭示自然环境中MDPE的综合降解模式。

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