Abstract Two natural weathering of neat polypropylene (PP) and hemp fibers reinforced PP biocomposites were investigated. The objective was to emphasize the relationships between the properties of materials according to the fiber loading and the weathering time in order to bring new insights of degradation mechanisms understanding. For this purpose, a Principal Component Analysis (PCA) method was applied to the dataset. The treatment carried out by isolating materials loaded by the three different hemp fiber rates particularly outstand the link between mechanical properties and products issued from oxidation. The close correlation between whitening parameter and C C bond level also confirmed the lignin degradation way. Finally, depending on the weathering duration, the properties characterized either fiber loading or weathering state (unweathered or weathered) whereas mechanical performance differentiated the three different non-weathered samples whatever the exposure time.

中文翻译：

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大麻纤维增强聚丙烯生物复合材料的自然风化：基于统计方法的视觉和表面方面、机械性能和微观结构之间的关系

摘要 研究了纯聚丙烯 (PP) 和大麻纤维增强 PP 生物复合材料的两种自然风化。目的是强调根据纤维负载和风化时间的材料特性之间的关系，以便为理解降解机制带来新的见解。为此，对数据集应用了主成分分析 (PCA) 方法。通过分离由三种不同的大麻纤维率加载的材料进行的处理特别突出了机械性能与氧化产生的产品之间的联系。白化参数与CC键水平的密切相关也证实了木质素的降解方式。最后，根据风化持续时间，