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Facile functionalization strategy of PBO fibres for synchronous improving the mechanical and wave-transparent properties of the PBO fibres/cyanate ester laminated composites
Composites Part A: Applied Science and Manufacturing ( IF 8.1 ) Pub Date : 2021-08-21 , DOI: 10.1016/j.compositesa.2021.106622
Lin Tang 1 , Zhiyong Yang 2 , Yusheng Tang 1 , Junliang Zhang 1 , Jie Kong 1 , Junwei Gu 1
Affiliation  

A copolymer of P(S-co-BCB-co-GMA) synthesized via reversible addition-fragmentation chain transfer (RAFT) polymerization was coated on the surface of poly(p-phenylene-2,6-benzobisoxazole) (PBO) fibres, followed by grafting 2, 2-bis(3-amino-4-hydroxyphenyl)hexafluoropropane (AHHFP) to obtain 6F-PBO@P-GMA fibres. The corresponding 6F-PBO@P-GMA fibres/modified cyanate ester wave-transparent laminated composites are then fabricated. The introduction of copolymer membrane and AHHFP reduces interfacial polarization and enhances the interfacial strength of the wave-transparent laminated composites. The corresponding flexural strength and interlaminar shear strength (ILSS) of the 6F-PBO@P-GMA fibres/modified cyanate ester wave-transparent laminated composites are 701.5 and 46.4 MPa, 19.3% and 12.9% higher than those of laminated composites reinforced by pristine PBO fibres, respectively. Meantime, the obtained wave-transparent laminated composites also possess the lowest complex permittivity, and wide high wave-transparent rate area at X-band (|T|2 > 93.5%, thickness: 0–2.10 mm).



中文翻译:

PBO纤维的简易功能化策略同步提高PBO纤维/氰酸酯层压复合材料的机械和透波性能

通过可逆加成断裂链转移 (RAFT) 聚合合成的 P(S- co- BCB- co- GMA)共聚物涂覆在聚 ( p-亚苯基-2,6-苯并双恶唑)(PBO)纤维,然后接枝2, 2-双(3-氨基-4-羟基苯基)六氟丙烷(AHHFP)得到6F-PBO@P-GMA纤维。然后制造相应的 6F-PBO@P-GMA 纤维/改性氰酸酯透波层压复合材料。共聚物膜和AHHFP的引入降低了界面极化并增强了透波层压复合材料的界面强度。6F-PBO@P-GMA纤维/改性氰酸酯透波层压复合材料的相应弯曲强度和层间剪切强度(ILSS)分别为701.5和46.4 MPa,比原始增强的层压复合材料高19.3%和12.9%分别为 PBO 纤维。同时,所得透波层压复合材料还具有最低的复介电常数,T | 2 > 93.5%,厚度:0–2.10 毫米)。

更新日期:2021-08-24
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