Novel phthalonitrile resins (BPAPNs) were prepared by blending phthalonitrile-terminated oligomeric polyaryl ether nitrile, 4,4′-(1,3-phenylenebis(oxy))diphthalonitrile (PN), and 4-amino-4-(3,4-dicyanophenoxy)phenyl. The curing behavior of the blends was studied by differential scanning calorimetry, Fourier-transform infrared spectroscopy, and rheology measurements. Additionally, quartz fiber-reinforced composites were prepared by hot-pressing process. Thermal stability and mechanical properties of cured phthalonitrile resins and composites were characterized and discussed. Compared with that of pristine PN, the impact strength of cured BPAPNs increased by 60%, while the thermal properties were not sharply compromised. Additionally, the maximum bending strength of BPAPNs composites reached 855 MPa, which was 56% higher than that of pristine PN. The current method shed light on the toughening of phthalonitrile resins, and the corresponding phthalonitrile resins could be used as the matrix for high-performance composites.

中文翻译：

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新型含芴基邻苯二甲腈封端聚芳醚腈增强邻苯二甲腈树脂的性能

通过将邻苯二甲腈封端的低聚聚芳醚腈、4,4'-(1,3-亚苯基双(氧基))二邻苯二甲腈 (PN) 和 4-氨基-4-(3,4-二氰基苯氧基)苯基。通过差示扫描量热法、傅里叶变换红外光谱和流变测量研究了共混物的固化行为。此外，通过热压工艺制备了石英纤维增强复合材料。表征和讨论了固化的邻苯二甲腈树脂和复合材料的热稳定性和机械性能。与原始 PN 相比，固化 BPAPNs 的冲击强度提高了 60%，而热性能没有急剧下降。此外，BPAPNs 复合材料的最大弯曲强度达到 855 MPa，比原始 PN 高 56%。