High mechanical property low impedance polymer bonded explosive and preparation method thereof

Abstract

The invention relates to a high-mechanical performance low-resistance high-polymer bonded explosive and a preparation method thereof, belonging to the technical field of composite energetic materials. The explosive of the present invention is prepared from a certain ratio of polymer bonding material polyurea, energetic material and explosive performance improving agent. The explosive of the present invention introduces a new type of binder, two-component slow-response polyurea, to effectively compound high-energy explosives, thereby significantly improving the mechanical properties of the energetic compound, and at the same time solving the problem of low adhesion of the existing high-energy composite explosives. High acoustic impedance problem. The high-polymer bonded explosive with high mechanical properties of the present invention improves the bonding strength between the explosive components and between the explosive and the surrounding materials, and plays an important role in improving the mechanical properties of the energetic compound and the improvement of the comprehensive performance of the charge. Value. In addition, the explosive of the present invention is prepared at normal temperature without generating waste water, waste liquid and waste gas, and has the advantages of safety and environmental protection, simple process and the like.

Description

technical field [0001] The invention relates to the technical field of composite energetic materials, in particular to a high-mechanical property low-resistance high-polymer bonded explosive and a preparation method thereof. Background technique [0002] The binder used in high polymer bonded explosives is usually an organic high polymer. When used in composite explosives, it is mainly used as a bonding component for bonding, and can also function as a desensitizing agent and an explosive carrier. [0003] There are many types of binders in traditional polymer bonded explosives, which can be roughly divided into three types according to the compound structure: hydrocarbon type, fluorocarbon type and energetic type. (1) Hydrocarbon binders include vinyl addition polymers such as polyisobutylene, polystyrene, polyacrylates; polyvinyl alcohol and its acetals; polyamides and linear polyesters. In addition, there are thermosetting resins, such as unsaturated polyester resins, ep...

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Problems solved by technology

(2) Fluorine-containing copolymers F2314, F2311, F2603, etc. belong to the fluorocarbon type, and their main advantages are high thermal stability and chemical stability, but they are difficult to synthesize, expensive, and easy to debond during coating. Used in devices requiring high heat resistance and stability

(3) The energy-containing type is mainly a nitro-containing high polymer, which itself contains energy, but has poor thermal stability, chemical stability and compatibility, and high sensitivity

[0004] In summary, it can be seen that the mechanical properties of explosives prepared with traditional binders limit the performance of high polymer composite explosives, especially the adhesion between the above-mentioned binders and the matrix is ​​still insufficient under high external impact

The material prepared by traditional binder materials has high acoustic impedance, and under the action of external shock waves, it is easy to accept the impact energy from the outside world, which reduces the difficulty of its shock detonation and affects its safety in use.

In addition, in the production process of polymer bonded explosives, in most cases, there are still environmental and safety problems such as waste water, waste gas, waste liquid, and complex processes.