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[Composites Part B] UV etched random copolymer membrane coated PBO fibers/cyanate ester wave-trasnparent laminated composites
作者:Lin Tang, Junliang Zhang, Chunliang Wu, Yusheng Tang*, Hao Ma, Jie Kong and Junwei Gu*
关键字:polymer-matrix composites
论文来源:期刊
具体来源:Composites Part B-Engineering
发表时间:2021年

AbstractPoly(p-phenylene-2,6-benzobisoxazole) fibers treated by random copolymer P(S-co-BCB-co-MMA) membrane and UV etching (UV-PBO@P fibers) are performed as reinforcement, bisphenol AF/amantadine modified bisphenol A cyanate ester (AEAF-co-BADCy) resin as polymeric matrix, and the UV-PBO@P fibers/AEAF-co-BADCy wave-transparent laminated composites were then fabricated. When the P(S-co-BCB-co-MMA) membrane thickness is 62.3 nm and the UV etching time is 96 hrs, UV-PBO@P fibers display the best interfacial compatibility with AEAF-co-BADCy resin, and the corresponding wave-transparent laminated composites present the optimal comprehensive performance. Interlaminar shear strength (ILSS) and flexural strength are 50.2 and 745.6 MPa, 27.4% and 21.6% higher than those (ILSS of 39.4 MPa, flexural strength of 613.3 MPa) of pristine PBO fibers/AEAF-co-BADCy wave-transparent laminated composites, respectively. And the composites possess low complex permittivity and tanδ, corresponding |T|2 in the X band is 88.9~94.2%. High-frequency structural simulation (HFSS) results demonstrate that the radome from the composites displays high |T|2 of 89.1~93.1% in the X-band, close to the theoretical calculation value. This work provides a certain theoretical guidance for fabricating lightweight, high strength, and high |T|2 polymer matrix wave-transparent composites, and further broadens the application of PBO fibers and cyanate ester resins in aviation/aerospace, 5G communication services, electronic information, and other fields.

以无规共聚物P(S-co-BCB-co-MMA)膜和紫外刻蚀协同处理的聚对苯撑苯并二噁唑(PBO)纤维为增强体,双酚AF/金刚烷改性的双酚A氰酸酯(AEAF-co-BADCy)树脂为透波基体,经“浸渍-缠绕-铺层-模压”法制备UV-PBO@P纤维/AEAF-co-BADCy树脂层压复合材料。结果表明,当PBO纤维表面P(S-co-BCB-co-MMA)(分子量为32300)膜厚度为62.3 nm,且紫外刻蚀时间为96 hrs时,UV96-PBO@P纤维/AEAF-co-BADCy树脂层压复合材料具有最佳的力学性能、透波性能和热性能。UV96-PBO@P纤维/AEAF-co-BADCy树脂层压复合材料的层间剪切强度ILSS和弯曲强度分别为50.2 MPa和745.6 MPa,较纯PBO纤维/AEAF-co-BADCy树脂层压复合材料的ILSS(39.4 MPa)和弯曲强度(613.3 MPa)分别提高了27.4%和21.6%。复介电常数实部(εr'''')、虚部(εr'''''''')和介电损耗角正切值(tanδ)分别为2.63、0.015和0.0057(10 GHz),且在X波段对应的透波率为88.9~94.2%,明显高于纯PBO纤维/AEAF-co-BADCy树脂层压复合材料对应波段的透波率(83.4~90.8%);高频结构仿真(HFSS)模拟结果表明UV96-PBO@P纤维/AEAF-co-BADCy树脂层压复合材料天线罩在整个X波段的透波率为89.1~93.1%,与理论计算的结果相近。同时,UV96-PBO@P纤维/AEAF-co-BADCy树脂层压复合材料具有最高的耐热指数(THRI,222.0oC)和玻璃化转变温度(Tg,236.3oC)。本工作可为制备轻质、高强和高透波的树脂基复合材料提供了一定的理论指导,进一步拓宽PBO纤维和氰酸酯树脂在航空/航天、5G通讯服务、电子信息等领域的应用范围。