几种高性能芳纶纤维的耐光性评价

利用氙弧灯和碳弧灯分别照射3种高性能芳纶纤维（Kevlar 129,Zylon AS（PBO）和Kermel纤维）,分析它们力学性能的变化.Kevlar 129纤维耐光性最好,Kermel纤维耐光稳定性最差.实验发现,尽管Zylon AS（PBO）纤维初始强力最高,但其耐光性较差,在光照条件下下降剧烈.同时发现碳弧灯下纤维试样的损失比氙弧灯下辐照损失大.通过纤维表观和断裂端形貌观察可清楚看出,这3种高性能纤维都因光辐照损伤,且都有脆性断裂特征.

Investigation on Photodegradation of High Performance Aramid Fibers

The tensile properties of three kinds of high performance fibers (Kevlar/PBO /Kermelfiber) are compared by using xenon arc light and carbon arc light to simulate sunlight ageing. Among the three samples, the Kevlar129 fiber has the highest mechanical retention property, and the retention of Kermelfiber is the worst in general. It can also be found the PBO has the worse sunlight resistant property although it has the highest original tenacity, but it drops rapidly under the light-radiation treatment. At the same time, it can be concluded from the tensile tests that the mechanical property loss under the carbon arc light is larger than that under the xenon arc light. From the SEM observation to these fibers treated in carbon arc light, there are significant radiation-etching damages on the fiber surface moreover, and all of the three fibers show brittle broken character.