Method for preparing ablative resistance resin

Abstract

The invention discloses a method for preparing ablative resistance resin which is a compound of hyperbranched polyborate ester resin and high-temperature resistance thermosetting resin. The hyperbranched polyborate ester is a hyperbranched polymer which contains boron, is provided with a rigid skeleton and is synthesized by condensation reaction of a boron-containing compound and polyatomic alcohol or polyatomic phenol; and the hyperbranched molecular structure and excellent heat resistance of the polymer are utilized so that the polymer and the high-temperature resistance thermosetting resin are compounded, thus the heat resistance, mechanical property and processing manufacturability of resin can be simultaneously improved. The ablative resistance resin obtained by the method has the advantages of high carbon residue rate, excellent mechanical property and ablative resistance, is easy to process, and can be used for preparing ablative resistance materials, carbon materials, anti-friction materials and the like.

Description

technical field [0001] The invention relates to a method for preparing a thermosetting resin, in particular to a method for preparing an ablation-resistant resin by compounding a hyperbranched polyborate resin and a high-temperature-resistant thermosetting resin. Background technique [0002] In the aerospace field, the development of aircraft thermal protection materials has always been an important research topic. The working environment of aerospace vehicles is harsh. In order to ensure their long-term work under high heat flux conditions, effective thermal protection measures must be taken. The ablation method is currently the most effective and widely used method of heat protection. This method removes a large amount of heat through chemical and physical processes such as decomposition, depolymerization, melting, evaporation, gasification, and ionization of materials to achieve heat protection. Purpose. The currently widely used ablation material is a composite materi...

AI Technical Summary

Problems solved by technology

However, polyarylene molecules contain a large number of aromatic rings, resulting in extremely poor toughness of the resin and interfacial bonding between the resin and the reinforcing fibers

In addition, the curing reaction of polyaryleacetylene resin has a large heat release and is easy to explode. The entire curing process is complicated and difficult to control, which brings a lot of inconvenience to the preparation of composite materials.

The high cost is also an obstacle to the wide application of polyarylene resins

[0004] In view of the common defects of poor toughness, poor manufacturability, and heat resistance, especially the residual carbon rate of existing high-temperature thermosetting resins, researchers have proposed a variety of modification methods for such resins, but these Traditional modification methods are mostly difficult to reconcile the contradiction between resin heat resistance, processability and toughness