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化学学报
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化学学报 ›› 2010, Vol. 68 ›› Issue (02): 199-204. 上一篇    

研究简报

抗紫外老化聚对苯撑苯并二噁唑(PBO)纤维的制备与表征

张涛，金俊弘，杨胜林，李光*，江建明   

  1. (纤维材料改性国家重点实验室 东华大学材料科学与工程学院 上海 201620)
  • 投稿日期:2009-06-06 修回日期:2009-07-24 发布日期:2010-03-17
  • 通讯作者: 李光 E-mail:lig@dhu.edu.cn

Preparation and Characterization of Poly(p-phenylene benzobisoxazole) (PBO) Fiber with Anti-ultraviolet Aging

Zhang Tao Jin Junhong Yang Shenglin Li Guang* Jiang Jianming   

  1. (State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Material Science & Engineering, Donghua University, Shanghai 201620)
  • Received:2009-06-06 Revised:2009-07-24 Published:2010-03-17

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2219

被引次数

30 | 3

通过化学添加2,5-二羟基对苯二甲酸(DHTA)共聚, 以及添加金红石型纳米TiO2物理共混的方法, 制备了聚对苯撑苯并二噁唑(PBO)的抗紫外改性纤维. 考察了纤维的力学性能、特性粘度及表面形貌在紫外老化过程中的变化, 并结合PBO纤维紫外加速老化后的红外分析, 对PBO纤维的光老化机理进行了初步研究. 结果表明, 本实验所制备的DHPBO纤维以及DHPBO/n-TiO2纤维的抗紫外老化能力明显高于PBO纤维, 并且金红石型纳米TiO2对PBO的抗紫外改性效果要优于有机紫外吸收剂(2,2-(1,2-乙烷二基)双(4,1-亚苯基)双苯并噁唑).

关键词: PBO纤维, 抗紫外老化, 力学性能, 降解机理

The modified poly(p-phenylene benzobisoxazole) (PBO) fibers, which exhibit anti-ultraviolet properties, were prepared by chemical copolymerization and physical blend methods. Mechanical property, intrinsic viscosity, SEM and ATR-FTIR techniques were used to characterize the fiber change before and after UV accelerated aging. Based on ATR-FTIR of PBO fibers before and after UV exposure, the UV aging degradation mechanism of PBO fiber was proposed. The results indicate that the DHPBO and DHPBO/n-TiO2 fibers show significantly improved UV resistance compared with the PBO fiber. In addition, the UV resistance of nano-rutile-TiO2 was obviously better than that of 2,2-[ethylenedi(p-phenylene)]bis- benzoxazole.

Key words: PBO fiber, anti-UV aging, mechanical property, degradation mechanism