国产CCF800H碳纤维增强耐高温双马树脂基复合材料的力学性能

doi:10.19936/j.cnki.2096-8000.20221128.017

摘要/Abstract

摘要： 采用热熔法制备预浸料,采用热压罐固化工艺制备了CCF800H/QY260E耐高温双马树脂基复合材料。首先测试了QY260E双马树脂的黏温特性,然后通过纤维表面扫描电镜测试、吸湿前后玻璃化转变温度测定、复合材料基本力学性能测试及断口形貌分析等方法,综合考察了国产CCF800H碳纤维复合材料的界面粘接性能、韧性和湿热性能。结果表明:QY260E树脂在较长的温度和时间范围内具有较低黏度。CCF800H/QY260E复合材料在71 ℃水浸14 d后的饱和吸水率仅为0.66%,其T_g仅比干态(286 ℃)下降了21 ℃,230 ℃湿态时0°拉伸强度较室温干态保持率大于80%,开孔拉伸强度较室温干态保持率大于90%,260 ℃湿态时0°拉伸强度较室温干态保持率大于70%,开孔拉伸强度大于90%,230 ℃及260 ℃湿态下,层间剪切强度、开孔压缩强度较干态下保持率均大于40%,冲击后压缩强度接近国外先进复合材料IM7-5250-4的水平,且90°拉伸试样和层间剪切试样纤维与树脂结合紧密。实验结果表明CCF800H/QY260E复合材料具有良好的力学性能和湿热性能。

关键词: 碳纤维, 耐高温双马树脂, 复合材料, 玻璃化转变温度, 力学性能

Abstract: CCF800H/QY260E high temperature resistant composites were prepared by hot melt mixing prepreg using autoclave processing. The viscosity-temperature property of QY260E was studied, and then the interfacial properties, toughness and hydrothermal-resistant properties of domestic CCF800H/QY260E composite were synthetically investigated by the scanning electronic microscopy (SEM), glass transition temperature (T_g) determination before and after moisture absorption, basic mechanical properties tests and fracture morphology analysis. The results show that QY260E bismaleimide composite possesses longer temperature and time range at low viscosity. The saturation hygroscopicity rate of CCF800H/QY260E is only 0.66%, and its T_g descends only 21 ℃ after 14 days at 71 ℃ immertion. In addition, the retention ratio of 0° tensile strength is above 80% and the open hole tensile strength is above 90% at 230 ℃/humidity. The retention ratio of 0° tensile strength is above 70% and the open hole tensile strength is above 90% at 260 ℃/humidity. The retention ratio of interfacial shear strength and open hole compression strength are above 40% at 230 ℃/humidity and 260 ℃/humidity. The CAI value of CCF800H/QY260E is close to foreign advanced composite IM7/5250-4. Tight connection between fiber and resin is observed from fracture morphology of 90°tensile samples and interlaminar shear samples. Therefore, all the results indicate that the CCF800H/QY260E composite has good mechanical properties and hydrothermal-resistant properties.

Key words: carbon fiber, high temperature resistant BMI resin, composite, glass transition temperature, mechanical properties

中图分类号:

TB332

王迎芬, 潘翠红, 周洪飞, 孙占红. 国产CCF800H碳纤维增强耐高温双马树脂基复合材料的力学性能[J]. 复合材料科学与工程, 2022, 0(11): 114-119.

WANG Ying-fen, PAN Cui-hong, ZHOU Hong-fei, SUN Zhan-hong. Mechanical properties of domestic CCF800H carbon fiber reinforced high temperature resistant BMI matrix composites[J]. COMPOSITES SCIENCE AND ENGINEERING, 2022, 0(11): 114-119.

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