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Hexagonal LLM-105 explosive large single crystal and preparation method thereof

A technology of single crystal and explosives, which is applied in the direction of explosives processing equipment, explosives, single crystal growth, etc., can solve the problems of low solubility, difficulty in the study of explosive single crystal growth, difficulty in dissolving in common organic solvents, etc., and achieve a simple process route Effect

Active Publication Date: 2020-11-03
INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Since it was reported by Pagoria et al. in the LLNL laboratory of the United States in 1998, a large number of studies on the synthesis, thermal properties, and safety performance of LLM-105 have been published one after another. However, due to the alternating arrangement of nitro and amino groups in the LLM-105 molecule Strong intramolecular and intermolecular hydrogen bonds make it difficult to dissolve in common organic solvents, even in highly polar solvents such as DMSO and DMF. great difficulty

Method used

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  • Hexagonal LLM-105 explosive large single crystal and preparation method thereof

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Effect test

Embodiment 1

[0020] At a temperature of 90°C, 6 g of solid LLM-105, 0.3 g of polyethylene glycol and 100 mL of dimethyl sulfoxide were thoroughly mixed to prepare a mixed solution of LLM-105. Then, at a temperature of 90°C, 50 mL of anhydrous methanol was added, stirred for 30 min, and then filtered to obtain a clear solution at 90°C. The clear solution was placed in an oven at 90°C and allowed to stand still, cooled to room temperature at a cooling rate of 5°C / min, filtered, washed, and dried to obtain a large single crystal of hexagonal LLM-105 explosive with a diameter of about 2mm.

Embodiment 2

[0022] At a temperature of 90°C, 4g of solid LLM-105, 0.3g of polylactic acid and 100mL of dimethylformamide were thoroughly mixed to prepare a mixed solution of LLM-105. Then, at a temperature of 90°C, 10 mL of methyl acetate was added, stirred for 40 min and then filtered to obtain a clear solution at 90°C. The clear solution was placed in an oven at 90°C and allowed to stand still, cooled down to room temperature at a cooling rate of 3°C / min, filtered, washed, and dried to obtain a large single crystal of hexagonal LLM-105 explosive of about 3mm.

Embodiment 3

[0024] At a temperature of 60°C, thoroughly mix 3 g of solid LLM-105, 0.36 g of polyacrylic acid and 100 mL of dimethyl sulfoxide to prepare a mixed solution of LLM-105. Then at a temperature of 60°C, 20 mL of ethyl acetate was added, stirred for 10 min and then filtered to obtain a clear solution at 60°C. The clear solution was placed in an oven at 60°C, cooled to room temperature at a cooling rate of 0.1°C / min, filtered, washed, and dried to obtain a large single crystal of hexagonal LLM-105 explosive with a thickness of about 1mm.

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Abstract

The invention discloses a hexagonal LLM105 explosive large single crystal and a preparation method thereof; the preparation method comprises the following steps: mixing LLM105 solid and an additive with a certain amount of a good solvent according to different proportions to prepare an LLM105 mixed solution; mixing the LLM105 mixed solution with a poor solvent according to a certain proportion, stirring the mixture for a period of time at a certain temperature, and filtering the mixture to obtain a clear solution; standing the clear solution, cooling the clear solutionto room temperature, andperforming filtering, washing and drying treatment to obtain the hexagonal LLM105 explosive large single crystal with the particle size range of 1mm-5mm. The preparation method disclosed by the invention is simple in process route, and can be used for obtaining the hexagonal-prism-shaped explosive large single crystal.

Description

technical field [0001] The invention belongs to the field of energetic materials, and in particular relates to a hexagonal LLM-105 explosive large single crystal and a preparation method thereof. The invention has good application prospects in insensitive ammunition. Background technique [0002] Selecting single crystal materials to study the detonation mechanism, elastic-plastic characteristics and detonation behavior of explosives is one of the most important methods to further understand the characteristics of explosives. The single crystal samples required for these studies almost all meet the requirements of a certain scale. Compared with inorganic materials, since the polycrystalline phenomenon of organic compounds is very common, the growth of single crystals, especially large single crystals, is very difficult. 1-Oxo-2,6-diamino-3,5-dinitropyrazine (LLM-105) is a new type of high-energy and low-sensitivity explosive integrating energy, safety and stability and othe...

Claims

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Application Information

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IPC IPC(8): C30B29/54C30B7/08C07D241/20C06B25/34C06B21/00
CPCC06B21/00C06B25/34C07B2200/13C07D241/20C30B7/08C30B29/54
Inventor 周小清李洪珍张祺徐容郝世龙陈东齐广宇杨宗伟
Owner INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS