聚酰亚胺/超高分子量聚乙烯纤维混杂增强复合材料防弹性能

Bulletproof performance of polyimide/UHMWPE fiber hybrid reinforced composites

  • 摘要: 针对超高分子量聚乙烯(UHMWPE)纤维增强防弹复合材料背部凸起(BFS)较高的不足,本研究充分利用聚酰亚胺(PI)纤维耐高温、高模量的优势,制备了一系列PI和UHMWPE纤维混杂复合材料靶板,研究了混杂靶板的铺层结构和混杂比例对比吸收能(SEA)值和背部凸起(BFS)值的影响,分析了混杂靶板防护作用机制。结果显示:PI纤维的使用可以在不影响SEA值的情况下有效限制BFS值,其中两极铺层结构(H3、UHMWPE/PI)和夹芯铺层结构(H4、PI/UHMWPE/PI)表现出混杂正效应,两种结构的SEA值和BFS值分别可达193.2 J·m2/kg,17.40 mm和208.9 J·m2/kg,17.77 mm,表现出优异的防弹性能。

     

    Abstract: Aiming at the deficiency of high back-face signature (BFS) of ultra-high molecular weight polyethylene (UHMWPE) fiber-reinforced ballistic composites, a series of polyimide (PI) and UHMWPE fiber hybrid composites were prepared by making full use of the advantages of high temperature resistance and high modulus of PI fibers in this study. The effects of layer structure and mixing ratio on the specific energy absorption (SEA) and BFS values of the hybrid composites and the protective mechanism were investigated. The results show that the use of PI fibers can effectively limit the BFS without affecting the SEA value. The bipolar layer structure (H3, UHMWPE/PI) and the sandwich layer structure (H4, PI/UHMWPE/PI) exhibit positive mixed effect. SEA and BFS values of the two structures can reach 193.2 J·m2/kg, 17.40 mm and 208.9 J·m2/kg, 17.77 mm, respectively, demonstrated excellent bulletproof performance.

     

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