Bismaleimide resin composition and solidified matter thereof as well as composite material

Abstract

The invention provides a bismaleimide resin composition. The bismaleimide resin composition is prepared from the following components in parts by weight: 100 parts of phosphorus-containing bismaleimide resin and 1 to 60 parts of epoxy resin, wherein the phosphorus-containing bismaleimide resin has a structure shown as a formula 1 and the formula 1 is shown in the description, wherein X is a phosphorus-containing group; R1 and R2 are hydrogen or alkyl; the R1 and the R2 can be the same or not. The bismaleimide resin composition provided by the invention has good interface cohesiveness with carbon fibers; a solidified matter of the bismaleimide resin composition and a composite material of the bismaleimide resin composition and the carbon fibers have high tensile strength and good toughnessand have the advantages of excellent mechanical property stability and good heat resistance, flame retarding performance and water resistance and the like, and are especially suitable for applicationwith large-size and durability requirements, such as airplanes, trains, automobiles and wind power generation blades.

Description

technical field [0001] The invention relates to the field of thermosetting resins, in particular to a double-horse resin and its cured product and composite material. Background technique [0002] Bismaleimide resin (referred to as bismaleimide resin) is a resin system derived from a polyimide resin system, a bifunctional compound with maleimide as an active terminal group. Its cured product is a high-performance thermosetting resin, which has the characteristics of high temperature resistance, radiation resistance, moisture resistance and corrosion resistance, and has been widely used in aerospace, electronics and other fields. However, Shuangma resin still has disadvantages such as difficult processing and poor impact resistance, which limit its application. [0003] In addition, carbon fiber reinforced bismaleimide resin composite material has light weight and high strength, but like other carbon fiber reinforced materials, due to the few active groups on the surface of ...

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Problems solved by technology

However, Shuangma resin still has disadvantages such as difficult processing and poor impact resistance, which limit its application.

[0003] In addition, carbon fiber reinforced bismaleimide resin composite material has light weight and high strength, but like other carbon fiber reinforced materials, due to the few active groups on the surface of carbon fiber, low reactivity, and poor adhesion to the matrix, carbon fiber reinforced There are many defects in the interface of bismaleimide resin composite material, and the interface bonding strength is low, which affects the overall performance of the composite material

[0004] Chinese patent (CN201110005064.7) modified carbon nanotubes with similar surface to carbon fibers, carboxylated carbon nanotubes, introduced diamine or polyamine on carbon nanotubes to obtain aminated carbon nanotubes, Then, the aminated carbon nanotubes are mixed with carboxylated carbon fibers, and diamines or polyamines are introduced on the surface of the carbon fibers, and the carbon fibers are prepolymerized with bismaleimide to obtain functionalized carbon fibers surface grafted with Reinforcing body of bismaleimide resin; react aminated carbon nanotubes with bismaleimide resin to obtain a strong matrix of bismaleimide resin for carbon nanotubes; then combine the two Mixed to obtain carbon nanotubes and functionalized carbon fiber reinforced maleimide resin composite material, the composite material has good mechanical properties, high interlayer strength and excellent impact resistance, but the preparation process is complex, the conditions are not easy to control, and the preparation cost is low

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