【摘要】 采用示差扫描量热仪,力学性能测试,扫描电镜分析和热重分析研究了在双酚F环氧树脂/酸酐固化体系中加入纳米粒子型增韧剂的效果。并以加入纳米粒子增韧剂的树脂体系为基体,碳纤维平纹布为增强体,通过真空辅助树脂传递模塑(VARTM)工艺制备了复合材料,对其力学性能和微缺陷进行了研究。结果表明,加入纳米粒子型增韧剂后,在弯曲强度损失较小的情况下,浇注体的拉伸性能有所提高,冲击韧性大幅增加。制备的复合材料树脂/纤维浸润良好,没有干斑存在,微缺陷较少,力学性能优异,有望用于VARTM成型大型汽车结构部件的制造。更多还原

【Abstract】 The effects of adding nano-particle toughening agent in the bisphenol F epoxy/anhydride curing system were investigated by differential scanning calorimetry,mechanical testing,scanning electron microscopy( SEM) and thermal gravimetric analysis.The composite was prepared by the vacuum assisted resin transfer molding( VARTM) process using the resin system with nano-particle toughening agent as the matrix and carbon fiber plain weave fabric as reinforcement.The mechanical properties and micro-defects of the composites were studied.The results showed that the tensile properties was improved and impact toughness was increased significantly in the case of small losses of flexural strength after adding the nano-particle toughening agent.The resin/fiber infiltration of composite was well and the composites had no dry spots,fewer micro-defects and excellent mechanical properties and was expected to be used in manufacturing VARTM molding large automotive structural components.更多还原