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An Important Factor Affecting the UV Aging Resistance of PBO Fiber Foped with Nano-TiO2: The Number of Amorphous Regions

1,2,*, 1,2, 1 and 1
1
School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China
2
State Key Laboratory of Explosion Science and Technology, Beijing 100081, China
*
Author to whom correspondence should be addressed.
Polymers 2019, 11(5), 869; https://doi.org/10.3390/polym11050869
Received: 14 February 2019 / Revised: 10 May 2019 / Accepted: 11 May 2019 / Published: 13 May 2019
(This article belongs to the Collection Design and Synthesis of Polymers)
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Abstract

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. View Full-Text
Keywords: titanium dioxide; poly(p-phenylene benzobisoxazole); ultraviolet aging; amorphous region titanium dioxide; poly(p-phenylene benzobisoxazole); ultraviolet aging; amorphous region
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Liu, J.; Liu, X.; Wang, D.; Wang, H. An Important Factor Affecting the UV Aging Resistance of PBO Fiber Foped with Nano-TiO2: The Number of Amorphous Regions. Polymers 2019, 11, 869.

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