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Improving the comprehensive properties of PBO fibres/cyanate ester composites using a hyperbranched fluorine and epoxy containing PBO precursor
Composites Part A: Applied Science and Manufacturing ( IF 8.1 ) Pub Date : 2021-08-14 , DOI: 10.1016/j.compositesa.2021.106596
Zheng Liu 1 , Xiaoli Fan 2 , Junliang Zhang 1 , Zhiyong Yang 3 , Yusheng Tang 1 , Jianwei Li 4 , Jie Kong 1 , Junwei Gu 1
Affiliation  

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).



中文翻译:

使用含 PBO 前体的超支化氟和环氧树脂改善 PBO 纤维/氰酸酯复合材料的综合性能

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)。

更新日期:2021-08-16
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