Self-repairing polyurethane based on boron-nitrogen coordination and preparation method thereof

Abstract

The invention discloses self-repairing polyurethane based on boron-nitrogen coordination and a preparation method thereof. The preparation method comprises the steps that a hydroxyl monomer and diisocyanate are subjected to a polymer reaction, a functional monomer is introduced in the polymer process, and the self-repairing polyurethane based on boron-nitrogen coordination is synthesized. The problem of contradiction between the mechanical property and the self-repairing efficiency of a polymer material is essentially solved, the polyurethane prepared by the method has excellent mechanical properties such as high strength and high toughness, repeated self-repairing can be realized, the self-repairing condition is mild, and the self-repairing efficiency is high.

Description

technical field [0001] The invention belongs to the technical field of new materials, and in particular relates to a self-repairing polyurethane based on boron-nitrogen coordination and a preparation method thereof. Background technique [0002] During the use of polymer materials (such as polyurethane), due to the influence of external factors such as heat, machinery, ultraviolet radiation and chemicals, it is inevitable that micro-cracks or defects that are difficult or impossible to detect quickly will be generated inside. , with the expansion of cracks or defects, the mechanical strength of the material will be significantly deteriorated, thereby reducing the basic performance and service life of the material, and significantly reducing its safety factor, increasing maintenance and replacement costs. At present, microcapsules are usually added to the polymer material matrix to achieve the effect of repair, trying to solve the above problems, but this method has the disad...

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Problems solved by technology

At present, microcapsules are usually added to the polymer material matrix to achieve the effect of repair, trying to solve the above problems, but this method has the disadvantages of complicated preparation process, high cost, and can not achieve repeated repairs. In addition, because polymer materials are mainly used in However, the existing room temperature self-healing polymer materials generally have poor mechanical properties and cannot meet actual needs. The room temperature self-healing properties and mechanical properties cannot be combined at the same time, which greatly limits polymer materials (such as polyurethane) Applications

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