The physical-mechanical properties of epoxy matrices modified with polyethersulfone (PES) and unidirectional glass- and carbon-fiber-reinforced plastics (GFRP and CFRP) based on them were investigated. The fracture toughness of epoxy matrices modified with 20 wt% PES, increased by 4.3 times. The delamination energy of GFRP and CFRP with this content of PES in the matrix increases by 50 and 65%, respectively. A correlation between the fracture toughness of modified matrices and the delamination toughness of GFRP and CFRP was established, and the influence of structure of the matrices on the fracture toughness of the reinforced plastics was demonstrated. A significant increase in the fracture toughness of the matrices and reinforced plastics was also observed during the formation of extended phases enriched with PES.

研究了聚醚砜（PES）改性环氧基体以及基于其的单向玻璃纤维和碳纤维增强塑料（GFRP和CFRP）的物理机械性能。20 wt% PES 改性的环氧树脂基体的断裂韧性提高了 4.3 倍。基体中含有该 PES 含量的 GFRP 和 CFRP 的分层能分别增加 50% 和 65%。建立了改性基体的断裂韧性与GFRP和CFRP的分层韧性之间的相关性，并论证了基体结构对增强塑料断裂韧性的影响。在富含 PES 的延伸相的形成过程中，还观察到基体和增强塑料的断裂韧性显着增加。