硬脂酸铁/聚丙烯共混纤维可控光降解性能的研究

Study on Controlled Photodegradation of Polypropylene/Ferric Stearate Polyblend Fiber

以硬脂酸铁（FeSt3）为光敏剂，将其加入聚丙烯（PP）切片中，经熔融共混纺丝制得PP／FeSt3共混纤维。通过人工加速紫外光降解试验，分析了含光敏剂的PP共混纤维力学性能以及光老化失重的变化情况，并与纯聚丙烯纤维进行对比。结果表明：FeSt3对PP共混纤维的光降解具有明显的催化作用。试验条件下，当共混纤维中添加0．2％～0．6％（质量）FeSt3时，其力学性能明显下降，老化诱导期显著提前，并且FeSt3含量越高，其催化作用就越强。通过控制FeSt3的添加量，可在一定程度上控制PP纤维的光降解行为。

Different contents of Ferric Stearate （ FeSt3 ） were added into polypropylene （PP） to prepare PP/FeSt3 composite, which was spun into fibers. The effect of FeSt3 on mechanical properties and loss of mass of iPP containing FeSt3 during artificial accelerated UV light weathering were studied. The results showed that FeSt3 exhibits a notable photocatalytic effect and can be a highly effective photodegradation for PP.Thereout, the photodegradation of PP can be controlled a certain extent by means of different contents of FeSt3.