快速固化环氧树脂/碳纤维复合材料的性能

利用差示扫描量热分析仪研究了一种快速固化环氧树脂体系的固化工艺参数,确定了以真空辅助树脂灌注工艺制备快速固化环氧树脂/碳纤维复合材料的成型方法,并与常规固化环氧树脂体系制备的碳纤维复合材料进行对比,采用傅里叶变换红外光谱仪对两种材料的树脂基体进行了分析,考察了两种复合材料的纤维含量、孔隙率及力学性能,最后通过扫描电子显微镜观察了快速固化树脂基体与碳纤维的界面结合性。结果表明,快速固化树脂在99℃下固化6 min后固化度可达96%,能够大幅缩减碳纤维复合材料的成型时间,以其制备的碳纤维复合材料拉伸强度比常规固化环氧树脂复合材料高11.20%,弯曲强度高16.92%,纵横剪切强度高7.44%,快速固化树脂与碳纤维界面结合性良好。

Properties of Rapid Curing Epoxy Resin/Carbon Fiber Composites

The process parameters for curing a kind of rapid curing epoxy resin were studied through differential scanning calorimetry,and the manufacturing method for molding carbon fiber reinforced rapid curing epoxy resin matrix composites was determined through vacuum assisted resin infusion process. The performace was compared with that of the composite manufactured with traditional epoxy resin,the composition of resin matrix was analyzed through Fourier transform infrared spectrometer spectra,fiber content and porosity of the composite were tested,and the mechanical properties were characterized, subsequently,SEM experiment was carried out to observe and analysis the interface bonding. The results show that under 99 ℃, the curing degree can reach 96% after 6 minutes,the cure time for manufacturing carbon fiber reinforced composite can be reduced substantially. Compared with the traditional epoxy resin carbon fiber reinforced composite,the tensile strength is 11.20% higher, bending strength is 16.92% higher,and the longitudinal-transverse shear strength is 7.44% higher,the interfacial bonded condition between resin matrix and carbon fiber is tight.