Research on Properties of 450°C Resistant Polyimide Composites

Abstract Carbon fiber/polyimide composites were prepared by high temperature molding process with carbon fiber, 450 °C resistant polyimide resin and related additives as raw materials. Effects of prepreg content, porosity post-treatment on properties studied, fracture shape was analyzed. Results show that shear fiber can be improved more than 50% after removing sizing agent, mechanical are the best when content is (30 to 40)%. Retention rate 90% less 1.5%. And decline sharply greater 2%. have good resistance below 450°C, a certain extent treatment at room 300°C. Fracture morphology analysis shows depend heat matching between fiber.