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| Heat Aging and High Temperature Mechanical Properties of PBO Fiber Paper-based Composites |
| Received:December 22, 2023 |
| DOI：10.11980/j.issn.0254-508X.2024.04.013 |
| Key Words:PBO fiber paper-based composites aging high temperature testing mechanical properties |
| Fund Project:国家重点研发计划（2021YFB3700104）。 |
| Author Name | Affiliation | Postcode | | SONG Zizhi | School of Light Industry and Engineering, South China University of Techonlogy, Guangzhou, Guangdong Province, 510640 | 510640 | | LIAO Sihuang | School of Light Industry and Engineering, South China University of Techonlogy, Guangzhou, Guangdong Province, 510640 | 510640 | | LONG Jin* | School of Light Industry and Engineering, South China University of Techonlogy, Guangzhou, Guangdong Province, 510640 | 510640 | | WANG Yi | School of Light Industry and Engineering, South China University of Techonlogy, Guangzhou, Guangdong Province, 510640 | 510640 | | XIONG Zhiyuan | School of Light Industry and Engineering, South China University of Techonlogy, Guangzhou, Guangdong Province, 510640 | 510640 | | HU Jian | School of Light Industry and Engineering, South China University of Techonlogy, Guangzhou, Guangdong Province, 510640 | 510640 |
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| Abstract:Poly-p-phenylene benzobisoxazole （PBO） paper was prepared by wet forming technology， and then impregnated with polyimide （PI） resin to obtain PBO fiber paper-based composite （PBO/PI）. Then the PBO/PI was aged at 300 ℃， and the tensile properties were tested at 300 ℃. The effects of aging and high temperature on the mechanical properties of PBO/PI and meta-aramid impregnated paper （PMIA/PI） simulated honeycomb lattice wall were analyzed and compared. The results showed that the tensile strength of both PBO/PI and PMIA/PI decreased due to the formation and expansion of microcracks after aging at 300 ℃， whereas the strength of PBO/PI before and after aging was stronger than that of PMIA/PI. The dynamic mechanical properties showed that the storage modulus of PBO/PI before and after aging was greater than that of PMIA/PI， indicating that the rigidity of PBO/PI was greater than that of PMIA/PI， PBO/PI was not easy to deformation at high temperature. The tensile strength and retention ratio of PBO/PI were higher than those of PMIA/PI when they were tested at 300 ℃. The mechanical properties of PBO/PI were better than those of PMIA/PI at room temperature and 300 ℃. The composites prepared by PBO fiber could be used in load-bearing structures and honeycomb parts requiring high deformation resistance and thermal stability. |
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