中文摘要：

综述了国内外聚对亚苯基苯并二噁坐（PBO）纤维老化的最新研究进展。重点介绍了国外研究PBO纤维水热老化和光照老化过程的方法以及对老化机理的推测和分析，指出通过改进纺丝工艺，完善纤维的结构以提高抗溶胀性能，选用合理的抗光氧化试剂以及对纤维进行化学改性，对纤维进行必要的物理防护等，将是今后PBO纤维抗老化的研究方向。

英文摘要：

Poly（p-phenylene benzobisoxazole） （PBO） fiber is regarded as the optimal organic fiber. However, application of the PBO fiber is subject to greatly influence of the decrease of mechanical properties due to the aging. Therefore it is necessary to study the aging and aging resistance of the fiber. This article reviews the recent research progress of study in the aging and aging resistance of PBO fiber. Further more, future prospect for study of aging and aging resistance of PBO fiber is also given. It is believed that the aging resistance of PBO fiber can be improved by adjusting the process of spinning, perfecting the structure of fiber, selecting appropriate antioxidizer, chemical modification and necessary physics protect.