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Polythiourea binder, preparation and application thereof, polymer bonded explosive based on polythiourea reinforcement and preparation method of polymer bonded explosive

A technology for bonding explosives and polythiourea, which is applied in the directions of explosives, non-explosive/non-thermal agent components, non-explosive fillers/gelling agents/thickeners, etc. The mechanical properties of the material are low, and the mechanical properties need to be further optimized to achieve the effects of easy amplification, excellent performance, and mild reaction conditions.

Active Publication Date: 2020-09-04
INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although thiourea-based polymers have become an emerging hotspot due to their high transparency, excellent mechanical properties and self-healing properties, the above reports are all focused on linear polymers, so the mechanical properties need to be further optimized
In addition, the introduction of thiourea-based polymers into energetic composites as a binder has not yet been reported, and the mechanical properties of related composites remain to be explored.
[0004] Therefore, in order to solve the problem of low mechanical properties of composite energetic materials in the prior art, the present invention discloses a polythiourea binder and its preparation and application, as well as a polymer bonded explosive based on polythiourea reinforcement and its preparation method

Method used

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  • Polythiourea binder, preparation and application thereof, polymer bonded explosive based on polythiourea reinforcement and preparation method of polymer bonded explosive
  • Polythiourea binder, preparation and application thereof, polymer bonded explosive based on polythiourea reinforcement and preparation method of polymer bonded explosive
  • Polythiourea binder, preparation and application thereof, polymer bonded explosive based on polythiourea reinforcement and preparation method of polymer bonded explosive

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example 1

[0027] Example 1 prepares the schematic flow sheet of the high polymer bonding explosive based on polythiourea reinforcement as figure 1 shown.

Embodiment 1

[0029] Step 1: Preparation of polythiourea binder: 2,2'-(ethylenedioxy)bis(ethylamine) (6.8g) and tris(2-aminoethyl)amine (0.2g) (both collectively referred to as Amino monomer) was dissolved in 50mL N,N-dimethylformamide (DMF) to form a solution of 0.14g / mL, cooled to 0°C, and then N,N'-thiocarbonyldiimidazole ( 7g), at this time, the mass ratio of N,N'-thiocarbonyldiimidazole to amino monomers is (1:1). The system was slowly heated to 30° C. and reacted at a stirring rate of 1000 rpm for 48 hours. After the reaction is completed, add 100 mL of chloroform to the above solution and mix well, then pour it into 1.5 L of ether and let it stand for precipitation. Polythiourea binder solution, the obtained polythiourea molecular weight is 21.5kg / mol.

[0030] Step 2: Preparation of polymer bonded explosive based on polythiourea reinforcement: 1,3,5-triamino-2,4,6-trinitrobenzene (TATB) with an average particle size of 100 μm was added to deionized In water, carry out mechanical st...

Embodiment 2

[0033] Step 1: Preparation of polythiourea binder: 2,2'-(ethylenedioxy)bis(ethylamine) (9.5g) and tris(2-aminoethyl)amine (0.5g) (both collectively referred to as amino monomer) was dissolved in 50mL dimethyl sulfoxide (DMSO) to form a solution of 0.2g / mL and cooled to 25°C, then N,N'-thiocarbonyldiimidazole (5g) was added in small batches, at this time The mass ratio of N,N'-thiocarbonyldiimidazole to amino monomers is (1:2). The system was slowly heated to 30° C. and reacted at a stirring rate of 1000 rpm for 48 hours. After the reaction is completed, add 50 mL of chloroform to the above solution and mix thoroughly, then pour into 0.5 L of ether and let it stand for precipitation. Polythiourea binder solution, the gained polythiourea molecular weight is 20.3kg / mol;

[0034] Step 2: Preparation of polymer bonded explosive based on polythiourea reinforcement: 1,3,5-triamino-2,4,6-trinitrobenzene (TATB) with an average particle size of 100 μm was added to deionized In water,...

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Abstract

The invention discloses a polythiourea binder, preparation and application thereof, a polymer bonded explosive based on polythiourea reinforcement and a preparation method of the polymer bonded explosive. The polymer bonded explosive based on polythiourea reinforcement is obtained by carrying out a polymerization reaction on 2, 2'-(ethylenedioxy) bis (ethylamine), tris (2-aminoethyl) amine and N,N'-thiocarbonyl diimidazole to prepare a polythiourea binder chloroform solution, uniformly mixing the polythiourea binder with an explosive in a water suspension-filtration manner, and carrying out suction filtration, washing and drying to obtain the polymer bonded explosive based on polythiourea reinforcement. Compared with a traditional polymer binder system, the polythiourea-based polymer bonded explosive obtained through the method has the advantages of being high in mechanical strength and toughness, and the preparation method is simple in process, low in cost and mild in reaction condition.

Description

technical field [0001] The invention belongs to the technical field of preparation of novel composite energetic materials, and specifically relates to a polythiourea binder and its preparation and application, as well as a polythiourea-based high polymer bonded explosive and a preparation method thereof. Background technique [0002] Polymer bonded explosives are a type of energetic composite material composed of polymer binder as the continuous phase and explosive particles as the main filler. Due to its excellent molding, mechanics and safety, it is widely used in weapon systems been widely used in. Although the polymer binder only accounts for 5% to 10% of the total mass of the energetic composite, it has an important influence on the comprehensive performance of the latter. Fluoropolymer is a binder widely used in recent years (J.Appl.Phys.2012,112,023523; Thermochim.Acta2013,562,56-64.), which has high physical, chemical and thermal stability, but The interaction betw...

Claims

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Application Information

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IPC IPC(8): C08G75/00C06B23/00
CPCC08G75/00C06B23/001
Inventor 李子健赵煦刘佳辉潘丽萍杨志剑聂福德
Owner INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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