期刊
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
卷 150, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesa.2021.106622
关键词
Polymer-matrix composites (PMCs); Laminates; Fibre/matrix bond; Mechanical properties
资金
- National Scientific Research Project (Basis Strengthening Plan)
- China Postdoctoral Science Foundation [2019 M653735]
- Innovation Foundation for Doctor Dissertation of Northwestern Polytechnical University [CX2021036]
- Polymer Electromagnetic Functional Materials Innovation Team of Shaanxi Sanqin Scholars
The copolymer membrane and AHHFP grafted onto the surface of PBO fibres enhances the interfacial strength and reduces interfacial polarization of the wave-transparent laminated composites. The resulting 6F-PBO@P-GMA fibres/modified cyanate ester composites exhibit higher flexural strength and interlaminar shear strength compared to composites with pristine PBO fibres, with excellent wave-transparency properties at X-band.
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 (vertical bar T vertical bar(2) > 93.5%, thickness: 0-2.10 mm).
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