The influence of weathering on the ballistic performance of an armor made with aramid fabric was for the first time investigated, by standard exposure related to degradation conditions of: (i) ultraviolet radiation (UV); (ii) moisten by washing (MW) and (iii) UV+MW. Fourier transform infrared (FTIR) spectroscopy, thermogravimetric analysis (TGA), X-ray diffraction (XRD) and scanning electron microscopy (SEM) characterized the modifications that occurred on the aramid fabric armor (AFA). Samples of both non-exposed (NE) and UV, MW and UV+MW exposed AFA, were subjected to ballistic tests against 0.380-caliber ammunition. The results of UV and UV+MW exposed samples revealed sensible macromolecular alterations, due to the scission of the polymeric chain by the processes of hydrolysis and photolysis, causing oxidation on the surface and breaking of the crystalline domains inside the aramid fiber. There was also a decrease in the crystallinity of the polyaramid macromolecular chain, being more severe after exposure to simple MW. However, no changes were observed in the thermal behavior of the AFA. The ballistic behavior was significantly affected by the weathering simulation conditions. The damage caused in the AFA by the ballistic impact was comparable within all groups exposed to degradation conditions. Practically, the same trauma, 28.2–32.1 mm and the same number, two (2), of perforated layers were observed for all exposed groups. These common ballistic results were less favorable than those of 25.7 mm and one layer, respectively, for the non-exposed AFA. The penetration traumas remained below the standard 44 mm lethal limit.

通过与下列降解条件有关的标准暴露，首次研究了风化对由芳纶织物制成的装甲的弹道性能的影响：（i）紫外线辐射；（ii）通过洗涤（MW）和（iii）UV + MW进行润湿。傅里叶变换红外（FTIR）光谱，热重分析（TGA），X射线衍射（XRD）和扫描电子显微镜（SEM）表征了芳纶织物装甲（AFA）上发生的修饰。对未暴露（NE）以及UV，MW和UV + MW暴露的AFA样品均进行了0.380口径弹药的弹道测试。UV和UV + MW暴露样品的结果显示出明显的大分子变化，这是由于水解和光解过程导致聚合物链断裂，导致表面氧化并破坏芳纶纤维内部的晶畴。聚芳酰胺大分子链的结晶度也降低，暴露于简单的MW后更为严重。但是，没有观察到AFA的热行为发生变化。弹道行为受风化模拟条件的影响很大。在暴露于降解条件的所有组中，弹道冲击对AFA造成的破坏是可比的。实际上，对于所有暴露组，观察到相同的创伤，为28.2–32.1 mm，穿孔层的数目为两（2）。对于未曝光的AFA，这些常见的弹道结果分别不如25.7 mm和一层好。穿透创伤仍低于标准的44毫米致死极限。