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采用双酚A型氰酸酯改性双马树脂,研制了一种新型无溶剂耐高温双马树脂基体,研究了树脂体系的黏度特性和固化反应动力学,进行了改性树脂体系的力学性能与耐热性研究,实现了T700CF/双马树脂基复合材料的湿法缠绕成型工艺。结果表明,改性双马树脂的拉伸强度为75.6 MPa,断裂伸长率为2.4%,弯曲强度为111 MPa,玻璃化转变温度为227.9℃。该改性双马树脂体系的黏度适中、适用期长且适于湿法缠绕,T700CF/双马树脂基复合材料的纵向拉伸强度为1 668 MPa,纵向弯曲强度为1 590 MPa,层间剪切强度为73.3MPa。
A bisphenol A-type cyanate ester modified bismaleimide resin was used to prepare a novel solvent-free and high temperature resistant bismaleimide resin matrix. The viscosity characteristics and curing reaction kinetics of the resin system were studied. The mechanical properties of the modified resin system With the study of heat resistance, the wet-entangling process of T700CF / bismaleimide resin composite was realized. The results show that the tensile strength of the modified bismaleimide resin is 75.6 MPa, the elongation at break is 2.4%, the flexural strength is 111 MPa and the glass transition temperature is 227.9 ℃. The modified double-horse resin system has moderate viscosity, long pot life, and is suitable for wet-winding. The tensile strength of the T700CF / bismaleimide resin composite is 1 668 MPa and the longitudinal bending strength is 1 590 MPa. The interlayer shear Tensile strength of 73.3MPa.