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In Situ Polymerization and Photophysical Properties of Poly(p-phenylene Benzobisoxazole)/Nano-Sized TiO2 Fibers
Abstract:
Poly (p-phenylene benzobisoxazole)/Nano-sized titanium dioxide (PBO/TiO2) composites with different TiO2 compositions were prepared through in situ polymerization and the fibers had been successfully spun via dry-jet wet spinning technique. PBO/TiO2 composite fibers were characterized by FTIR spectroscopy, Ubbelohde capillary viscometer, TG analyses and so on. Mechanical property of the fibers was investigated before and after UV accelerated aging which being exposed under ultraviolet radiation for up to 100 hours. Results showed that the molecular weight of PBO in the Nano composites was less declined with low content of TiO2; the thermal degradation temperature of PBO/TiO2 fibers were at less 10°C higher than that of pure PBO fiber in the atmosphere of N2; The pure PBO had a large deterioration in mechanical properties, and in the initial exposure time tensile strength of fibers dropped slowly after TiO2 adding in. From these results, the nano-TiO2 had good UV-aging shielding efficiency for PBO fiber.
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605-608
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December 2012
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© 2013 Trans Tech Publications Ltd. All Rights Reserved
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