中文摘要：

为了评估改性芳纶织物增强环氧树脂基材料的弯曲性能，通过真空辅助树脂传递工艺（VARI），分别制备20％H3PO4改性（改性时间2、4、6h）、γ-氨丙基三乙氧基硅烷（KH-550）改性（质量分数分别为3％、5％、7％）和60％HNO3改性（改性时间12、24、36h）芳纶织物增强树脂基材料，一方面从动态热力学（DMA）角度分析了不同改性工艺对材料储能模量、损耗模量和活化能的影响；另一方面从静态力学角度分析了不同改性工艺对材料拉伸性能的影响。结果表明，质量分数20％H3PO4改性后材料的储能模量、活化能都大幅度提升，最大增幅分别为64．48％、35．4％；KH-550改性后材料的储能模量、活化能呈现一定的线性增长，其中5％KH-550改性方案中，活化能提升幅度最大，达到521kJ／mol；HNO3改性后材料的储能模量下降，HNO3改性时间不宜过长；几种改性方案中，以拉伸性能增幅为指标，排序为H3PO4改性〉KH-550改性〉HNO，改性，且HNO3改性增幅为负值，H3PO4改性2h方案最佳。

英文摘要：

In order to assess the flexural property of modified Kevlar fabric reinforced epoxy resin materials, Kevlar fabric reinforced resin materials with different modifications, including different time （2 h, 4 h, or 6 h） treatment of 20wt% H3 PO4, different concentration of KH-550 （3wt% , 5wt% or 7wt% ） treatment, and different time （12 h, 24 h, or 36 h） treatment of 60wt% HNO3, were prepared by vacuumassisted resin infusion （VARI） technology. On the one hand, the effect of different modifications on the storage modulus, loss modulus and activation energy of the materials was analyzed by dynamic mechanical analysis （DMA） technology. On the other hand, the tensile property of different modified materials was studied by static mechanics method. The results show that after 20wt% H3 PO4 modification, the storage modulus and activation energy of materials are significantly improved respectively by 64.48% and 35.4% in maximum. The values of storage modulus and activation energy of different KH-550 concentration modified materials presente a certain linear growth. The activation energy of 5wt% KH-550 modified material increases to the highest value of 521 kJ/mol. The storage modulus of materials decreases after HNO3 modification. The tensile properties amplification is as follows： H3 PO4 modified material 〉 KH-550 modified material 〉 HNO3 modified material. The best modified time of H3PO4 is 2 h.