Benzoxazine resin-based composite material with ablation resistance and heat insulation and forming method of benzoxazine resin-based composite material

Abstract

The invention provides a benzoxazine resin-based composite material with ablation resistance and heat insulation and a forming method of the benzoxazine resin-based composite material. The benzoxazineresin-based composite material comprises the components: in parts by weight, 30-40 parts of benzoxazine resin, 60-70 parts of boron phenol resin, 100 parts of acetone and 160 parts of acrylonitrile carbon fiber, and curing is performed at a temperature of 200-210 DEG C and a pressure of 4-15 MPa for 20-30 min. On the premise that no reduction of ablation resistance of nozzles and performance of heat-insulation expansion sections, linings of partitions, outer linings of the partitions, backings of the partitions and other components of solid rocket engines is ensured, the defect rate of products is reduced, the toughness of the resin matrix is improved, and the subsequent processability of molded products is improved.

Description

technical field [0001] The invention relates to a composite material, which is used for the ablation-resistant and heat-insulating lining of solid rocket motor nozzle expansion section, clapboard inner, outer lining and backing, and is also suitable for ablation-resistant and higher temperature-resistant grades. High-strength FRP products. Background technique [0002] At present, the ablation-resistant and heat-insulating linings of commonly used solid rocket motors are mostly made of carbon fiber / boron phenolic molded. Boron phenolic resin has higher heat resistance and instantaneous high temperature resistance than ordinary phenolic resin. In addition, fiber-reinforced plastics have high mechanical strength, good ablation resistance and wear resistance, and can meet the requirements of solid rocket motors for thermal insulation structural parts. Requirements. At present, this kind of scheme is widely used, the cost is relatively low, and the process maturity is high, bu...

AI Technical Summary

Problems solved by technology

However, when the resin is used alone, due to the high rigidity of the benzene ring, the product is brittle, and the product is prone to stretching or breaking, which limits the use of the resin

[0004] In the current research, it is reported that benzoxazine resin and epoxy resin are blended and molded to form a phenolic-like network structure, but domestic research on the blending modification of benzoxazine resin and epoxy resin is rarely mentioned, and it is used in molding production blank

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