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首页> 美国卫生研究院文献>Polymers >An Important Factor Affecting the UV Aging Resistance of PBO Fiber Foped with Nano-TiO2: The Number of Amorphous Regions
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An Important Factor Affecting the UV Aging Resistance of PBO Fiber Foped with Nano-TiO2: The Number of Amorphous Regions

机译：影响纳米TiO2包覆的PBO纤维抗紫外线老化性能的重要因素：非晶区数量

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Modified nano-TiO2 was prepared by using triethanolamine and tetraisopropyl di (dioctylphosphate) titanate, respectively. Then the poly(p-phenylene benzobisoxazole) (PBO) fibers doped with different additions of modified nano-TiO2 particles were prepared by preparing PBO polymer solution and dry-jet wet spinning technique. Thermogravimetric and derivative thermogravimetry results showed that the addition of nano-TiO2 could improve the crystallinity and maximum thermal decomposition rate temperature of PBO fibers. Tensile strength results showed that nano-TiO2 addition did not affect the tensile properties of PBO fibers before ultraviolet (UV) aging began, and nano-TiO2 with addition values lower than 3% could improve the UV aging resistance performance of PBO fibers, while the aging resistance would be seriously reduced if values were over 5%. The size and quantity of the amorphous regions have a more important influence on the aging resistance of PBO fibers.
机译：分别使用三乙醇胺和钛酸四异丙酯二（磷酸二辛酯）制备了改性的纳米TiO2。然后通过制备PBO聚合物溶液和干喷湿法纺丝技术制备了掺有不同添加量的改性纳米TiO2颗粒的聚对苯撑苯并二恶唑（PBO）纤维。热重和导数热重分析结果表明，加入纳米TiO2可以提高PBO纤维的结晶度和最大热分解速率温度。拉伸强度结果表明，添加纳米TiO2不会影响PBO纤维在紫外线（UV）老化之前的拉伸性能，添加量低于3％的纳米TiO2可以提高PBO纤维的抗紫外线老化性能，而如果该值超过5％，则会严重降低抗老化性。非晶区域的大小和数量对PBO纤维的耐老化性具有更重要的影响。

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