一种回转体类构件用中低温固化环氧树脂体系研究

采用等温黏度实验和浇铸体力学性能测试来优选自制改性固化剂CUR–1的配比,通过不同升温速率下的固化过程差示扫描量热并对固化物进行傅立叶变换红外光谱分析,确定了体系的固化制度,研制出一种适用于发动机壳体或结构复杂的回转体类结构件的碳纤维湿法缠绕树脂基复合材料的中低温固化环氧树脂体系,用湿法缠绕工艺制作单向纤维缠绕成型复合材料环(NOL环)并进行了性能测试。结果表明:当CUR–1的含量为15份时,树脂体系具有适于湿法缠绕工艺的黏度和使用期,树脂可在80℃完全固化,同时浇铸体拉伸强度为84 MPa,拉伸弹性模量为3.8 GPa,断裂伸长率为5.4%,热变形温度为131℃。该树脂体系与纤维粘结性好,NOL环力学性能高,NOL环拉伸强度为2 451 MPa,拉伸弹性模量为146 GPa,层剪切强度为55 MPa。

Study on Low-Moderate Temperature Curing Epoxy Resin System for Revolving Body Components

A low-moderate temperature curing epoxy system for carbon fiber wet filamemt winding composite was acquired. The formula of curing agent CUR–1 were optimized by using isothermal viscosity tests and resin casting body tests analysis. The curing system of the epoxy resin was determined by differential scanning calorimetry scanning at different heating rates and Fourier transform infrared spectrum analysis of the cured products. A suitable low-moderate temperature curing epoxy resin system of carbon fiber wet winding resin matrix composites for motor shell or complex axisymmetrical component was developed. The performance of unidirectional filament winding composite loop (NOL) prepared by wet filament winding was tested.The results show that theresin system is suitable for wet filament winding when the content of CUR–1 is 15 phr. The resin can be cured at 80℃and the tensile strength,tensile modulus and elongation are 84 MPa,3.8 GPa,5.4% respectively,the thermal deformation temper is 131℃. The NOL ring tests show a good bonding ability between resin and fiber,the tensile strength is 2 451 MPa,the tensile modulus is 146 GPa,the inter laminar shear strength is 55 MPa .