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 resin content, porosity and post-treatment temperature on properties of composites were studied,...

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Bibliographic Details
Published in:Journal of physics. Conference series 2023-04, Vol.2460 (1), p.12091
Main Authors: Gao, SZ, Huang, ZQ, Wang, XL, Li, DY, Wang, J, Luo, CH, Qi, FJ, Xu, XY, Ma, KB, Yu, G
Format: Article
Language:English
Subjects:
Additives
Carbon fiber reinforced plastics
Carbon fibers
Composite materials
Heat resistance
High temperature
Mechanical properties
Molding (process)
Physics
Polyimide resins
Porosity
Raw materials
Room temperature
Shear properties
Thermal resistance
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Summary: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 resin content, porosity and post-treatment temperature on properties of composites were studied, and fracture shape was analyzed. Results show that high temperature shear properties of carbon fiber can be improved by more than 50% after removing sizing agent, and mechanical properties of composites are the best when the resin content of prepreg is (30 to 40)%. Retention rate of mechanical properties of composites is more than 90% when porosity is less than 1.5%. And mechanical properties decline sharply when porosity is greater than 2%. Carbon fiber/polyimide composites have good high temperature resistance below 450°C, and mechanical properties of composites can be improved to a certain extent after treatment at room temperature to 300°C. Fracture morphology analysis shows that high temperature mechanical properties of composites depend on heat resistance of resin and matching between resin and fiber.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/2460/1/012091