低成本VARI用中温固化环氧树脂基复合材料的制备及力学性能评价  

Preparation and Performance Evaluation of Moderate Temperature Curing Epoxy Resin Matrix Composites for Low-cost VARI Molding Process

作　　者：张文卿 孙波 张晶 尹亮[1] 左小彪[1] 李桂洋 ZHANG Wenqing;SUN Bo;ZHANG Jing;YIN Liang;ZUO Xiaobiao;LI Guiyang(Aerospace Research Institute of Materials&Processing Technology,Beijing 100076)

机构地区：[1]航天材料及工艺研究所,北京100079

出　　处：《宇航材料工艺》2024年第5期58-61,共4页Aerospace Materials & Technology

摘　　要：本文制备并评价了一种低成本真空辅助树脂灌注(VARI)成型工艺用的环氧树脂体系(V601)及其复合材料。本文通过DSC曲线、流变曲线、力学测试对该树脂基体及其复合材料进行评价。结果表明:V601环氧树脂体系可以在120℃/2 h固化制度下完全固化;树脂的工艺适用期长(黏度≤500 mPa·s,225 min);树脂固化物的拉伸强度77.7 MPa,拉伸模量3.25 GPa,弯曲强度137.7 MPa,弯曲模量3.37 GPa。通过VARI方法制备的SW280F/V601复合材料的纤维体积含量为67.7%,纵向拉伸强度为626 MPa,纵向拉伸模量为25.8 GPa,纵向弯曲强度为727.4 MPa,纵向弯曲模量为11.7 GPa。结果说明了V601树脂体系具有良好的VARI成型工艺适用性,制备的复合材料也具有较高的力学性能。This paper prepared and evaluated an epoxy resin system(V601)and its composite materials for a low-cost vacuum assisted resin infusion(VARI)molding process.This paper evaluated the resin matrix and its composite materials through DSC curves,rheological curves,and mechanical tests.The results show that the V601 epoxy resin system can be completely cured under a curing system of 120℃/2h;the process applicability period of resin is long(viscosity≤500 mPa·s,225 min);the tensile strength of the resin cured material is 77.7 MPa,the tensile modulus is 3.25 GPa,the bending strength is 137.7 MPa,and the bending modulus is 3.37 GPa.The fiber volume content of SW280F/V601 composite material prepared by VARI method is 67.7%,the longitudinal tensile strength is 626 MPa,the longitudinal tensile modulus is 25.8 GPa,the longitudinal bending strength is 727.4 MPa,and the longitudinal bending modulus is 11.7 GPa.The results indicate that the V601 resin system has good applicability to VARI molding process,and the prepared composite materials also have high mechanical properties.

关 键 词：VARI 环氧树脂 低成本复合材料 力学性能 

分 类 号：TB332[一般工业技术—材料科学与工程]