聚芳酯织物的光老化性能

Photoaging properties of Vectran fabric

为了探究聚芳酯织物受光老化作用的影响,通过氙弧灯光照老化实验处理聚芳酯织物,研究了聚芳酯织物光老化前后的拉伸性能和结构变化,探讨了聚芳酯纤维的光老化机制。结果表明:氙弧灯光的加速老化使聚芳酯织物的拉伸强力明显下降。红外图谱分析显示,1 725 cm-1附近的C O吸收峰和1 110 cm-1附近的C―O吸收峰有明显下降,分子链发生断裂;ESEM分析显示,纤维内部有低分子物质析出,导致试样表面微观结构严重粗化;DSC分析显示,光老化使纤维内部的结晶结构遭到严重破坏。

To research the influence of light aging on Vectran fabric,the photoaging of Vectran fabric exposed to xenon-arc lamp was investigated. The tensile propeties and structure before and after photoaging experiments were investigated,as well as the aging mechanism of Vectran fiber. xenon-arc Lamp exposure leads dramatic decrease of the tensile strength of Vectran fabric. It can be seen that the absorption peaks of C O near 1 725 cm- 1and of C—O near 1 110 cm- 1become weaken from ATR-FT-IR spectra of Vectran fiber,which was attributed to breaking of molecular chains. The ESEM images shows that low molecule compounds are separated out from the inner side of Vectran fiber,which results in serious coarsing on the fiber＇ s surface. The DSC analysis shows the photoaging has seriously destroyed the crystalline structure inside the Vectran fiber.