Structural bearing-ablation integrated phthalonitrile resin as well as preparation method and application thereof

The invention relates to structure bearing-ablation integrated phthalonitrile resin as well as a preparation method and application thereof. The structure bearing-ablation integrated phthalonitrile resin is prepared from the following components in parts by mass: 80 to 100 parts of autocatalytic phthalonitrile resin, being a mixture of phthalonitrile resin and phthalonitrile resin of which the molecular structure contains amino groups; 5 to 30 parts of a co-curable toughening agent; and 1 to 20 parts of an anti-ablation modifier, being one or more of silicon dioxide particles, zirconium dioxide particles and boron carbide particles. The structure bearing-ablation integrated phthalonitrile resin disclosed by the invention has proper melt viscosity, and is suitable for a molding process or an autoclave composite material molding process; thus, a resin-based composite material prepared by the method has high strength and excellent ablation resistance, and is suitable for structural bearing-ablation integrated co