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为提高高模量碳纤维复合材料的力学性能,研究改性氰酸酯、5228、4211与碳纤维结合面结合性能。用SEM、AFM、微脱粘仪、万能力学试验机等仪器设备,观察了碳纤维表面微观形貌、树脂基体与碳纤维结合面微观粘接情况,并对复合材料的宏观力学性能进行分析研究。结果表明,高模量碳纤维随着模量的提高,表层的缺陷与沟槽减少、表面活性降低,与树脂的结合面粘接强度减弱;改性氰酸酯与纤维的结合面粘接性能较好、5228次之、4211较差;树脂与纤维结合面粘接强度大的,其复合材料的力学性能好。
In order to improve the mechanical properties of high modulus carbon fiber composites, the bonding properties of modified cyanate ester, 5228,4211 and carbon fiber were studied. The microstructure of carbon fiber surface and microscopic bonding between resin matrix and carbon fiber were observed by SEM, AFM, micro-debonding instrument and universal mechanical testing machine. The macroscopic mechanical properties of the composite were also studied. The results show that with the increase of modulus, the modulus of high modulus carbon fiber decreases, the surface defects and grooves decrease, the surface activity decreases, and the bonding strength with the resin surface is weakened. The adhesive properties of modified cyanate ester and fiber surface Good, 5228 times, 4211 poor; resin and fiber bonding surface bonding strength, and its mechanical properties of the composite material is good.