Hyperbranched fluorine and epoxy containing PBO precursor (epoxy-preFHBPBO) was synthesized and utilized as interface compatibilizer to synchronously improve the mechanical and dielectric properties of poly(p-phenylene-2, 6-benzobisoxazole) (PBO) fibres reinforced bisphenol A dicyanate ester (BADCy) resins (PBO fibres/FHBPBO-co-BADCy) laminated composites. ¹H NMR, ¹³C NMR, and FTIR analyses confirmed the successful preparation of epoxy-preFHBPBO. The introduction of hyperbranched structure and fluorine groups significantly improved the mechanical properties and wave-transparent performance. Compared with PBO fibres/BADCy, the flexural strength and interlaminar shear strength of PBO fibres/FHBPBO-co-BADCy composites with 7 wt% epoxy-preFHBPBO were respectively enhanced to 634.9 and 46.9 MPa, increased by 8.1% and 27.8%. The corresponding dielectric constant and dielectric loss were 2.65 and 0.003, respectively, lower than those of PBO fibres/BADCy (3.06 and 0.006) composites. Meanwhile, the corresponding volume resistivity and breakdown strength were 4.93 × 10¹⁵ Ω•cm and 25.38 kV/mm, higher than PBO fibres/BADCy resins composites (2.2 × 10¹⁵ Ω•cm and 17.69 kV/mm).

合成含超支化氟和环氧树脂的 PBO 前驱体 (epoxy- pre FHBPBO) 并用作界面增容剂，以同步改善聚 ( p-亚苯基-2, 6-苯并双恶唑) (PBO) 纤维增强双酚 A 二氰酸酯的机械和介电性能(BADCy) 树脂（PBO 纤维/FHBPBO- co- BADCy）层压复合材料。¹ H NMR、¹³ C NMR 和 FTIR 分析证实了环氧预制胶的成功制备。FHBPBO。超支化结构和氟基团的引入显着提高了机械性能和透波性能。与PBO 纤维/BADCy 相比，含有7 wt% 环氧预制FHBPBO的PBO 纤维/FHBPBO- co- BADCy 复合材料的弯曲强度和层间剪切强度分别提高到634.9 和46.9 MPa，分别提高了8.1% 和27.8%。相应的介电常数和介电损耗分别为 2.65 和 0.003，低于 PBO 纤维/BADCy（3.06 和 0.006）复合材料。同时，相应的体积电阻率和击穿强度分别为4.93×10 ¹⁵ Ω•cm和25.38 kV/mm，高于PBO纤维/BADCy树脂复合材料（2.2×10 ¹⁵ Ω•cm和17.69 kV/mm）。