Study on cyanate resin modified by prepolymer of bismaleimide

Cyanate resin (CE) modified by prepolymer of bismaleimide (BMI) with different contents were prepared. The reaction between CE and BMI were studied with FT-IR. The reactive mechanism of CE/BMI was discussed and the reactive equations were given. Meanwhile, the mechanical properties and thermal properties of the CE/BMI system with the different content of BMI were investigated. The result shows that the CE/BMI systems have good impact strength and flexural strength due to co-reaction between CE and BMI, self-polymerization of cyanate resin, self-polymerization of bismaleimide occured. When the content of BMI is 33.3%, the impact strength and flexural strength of the CE/BMI system is 153.7 MPa and 18.6 kJ/m², respectively. Also the CE/BMI systems have good thermal property and the temperature of thermal decomposition is above 410°C.