采用双酚A型环氧树脂(DGEBA)、改性咪唑(MIM)及改性脂肪胺(MAA)研制快速固化树脂体系.分别利用DSC和流变仪测试了树脂体系的固化特性与流变行为,优选了树脂配方.采用真空辅助树脂灌注工艺(VARIM)制备了快速成型的碳纤维/环氧复合材料层板,考察了层板的成型质量和力学性能,并与常规固化的层板性能进行了对比.结果表明:采用优选的树脂配方,1 20℃下树脂在5 min内固化度达95％,碳纤维/环氧复合材料层板成型固化时间可控制在13 min以内,固化度达95％以上,并且没有明显缺陷;与常规固化相比(固化时间大于2h),快速固化碳纤维/环氧复合材料层板的弯曲性能和耐热性能降低幅度较小.
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