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Preparation method of azido polyether propellant high-purity sol

A technology of propellant and nitrogen polyether, which is used in the field of separation of energetic polymer materials, and can solve problems such as inapplicability

Inactive Publication Date: 2017-05-24
HUBEI INST OF AEROSPACE CHEMOTECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The biggest difference between the azide polyether propellant and the above-mentioned propellants lies in the binder system and the oxidizer system. For many high-risk components such as nitrate esters, energetic binder azide polyether, oxidizers and high-energy explosives, etc. For the azide polyether propellant, the methods reported in the above literature are not suitable for the preparation of azide polyether propellant sol

Method used

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  • Preparation method of azido polyether propellant high-purity sol
  • Preparation method of azido polyether propellant high-purity sol
  • Preparation method of azido polyether propellant high-purity sol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Embodiment 1: Purification and preparation of azide polyether propellant sol

[0025] Step 1, prepare the test sample: cut the propellant into fine particles, weigh 100 grams of the cut particles, use ethanol as the solvent, add 200 mL of ethanol, and use a Soxhlet extractor to heat and reflux at 85 ° C to extract to solution colorless. Discard the solution.

[0026] Step 2: Change to another solvent, choose chloroform as the solvent, add 200 mL of chloroform, and use Soxhlet extractor for extraction. Heat and reflux at 85°C for 1 day, collect the solution, remove most of the solvent, and vacuum-dry the obtained jelly to obtain pure sol.

[0027] figure 1 Be the infrared spectrogram of embodiment 1 pure sol, figure 2 , image 3 It is the proton spectrum and carbon spectrum nuclear magnetic resonance spectrogram of embodiment 1 pure sol. Depend on figure 1 and figure 2 , image 3 It can be seen that the sol is pure azide polyether polyurethane.

Embodiment 2

[0028] Embodiment 2: Purification and preparation of azide polyether propellant sol

[0029] Step 1, prepare the test sample: cut the propellant into fine particles, weigh 50 grams of the cut particles, use a mixed solvent of methanol and ethanol as the solvent, add 100 mL of solvent, and use a Soxhlet extractor to heat and reflux at 85 °C , extracted until the solution was colorless. Discard the solution.

[0030] Step 2, replace with another solvent, the solvent is a mixed solvent of acetonitrile and chloroform, add 100 mL of solvent, and use Soxhlet extractor to extract. Heat and reflux at 85°C for 2 days, collect the solution, remove most of the solvent, and vacuum-dry the obtained jelly to obtain pure sol.

[0031] Figure 4 Be the infrared spectrogram of embodiment 2 pure sol, Figure 5 , Figure 6 It is the proton spectrum and carbon spectrum nuclear magnetic resonance spectrogram of embodiment 2 pure sol. Depend on Figure 4 and Figure 5 , Figure 6 It can be...

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Abstract

The invention relates to a preparation method of an azido polyether propellant high-purity sol. The preparation method comprises the steps of preparing a detection sample: cutting an azido polyether propellant into fine grains, weighing the fine grains, placing the fine grains in a filter paper cylinder, adding a solvent, adopting a soxhlet extractor for heating and reflowing at the temperature ranging from 60 DEG C to 85 DEG C, extracting until a solution is colorless, and discarding the solution; adding a solvent, adopting a soxhlet extractor extracting method, heating and reflowing at the temperature ranging from 60 DEG C to 85 DEG C for 1 to 2 days, collecting a solution, removing most solvent, vacuum drying an obtained gel, and obtaining the pure sol. During a preparation process, the solvent only dissolving large dosage of nitric acid ester and part of oxidizing agent is adopted, and the solvent only dissolving a macromolecular sol and a sol extracting method are adopted, so that the large dosage of nitric acid ester, the oxidizing agent, the high-energy dynamite and other high dangerous substances and micromolecule substances during a sol extraction process are removed so as to prepare the pure sol. The preparation method of the azido polyether propellant high-purity sol provided by the invention provides a new way for purifying samples and removing impurities in the field of propellants.

Description

technical field [0001] The invention relates to a method for separating energetic polymer materials, in particular to a method for purifying azide polyether propellant sol. Background technique [0002] The propellant sol is a polymer that does not form a network structure after the curing reaction of the binder system and the curing agent system. The change of the sol composition can more essentially reflect the failure mechanism of the solid propellant. [0003] In order to meet the requirements of high-energy and low-signature weapons and equipment, the formula of azide polyether propellant is largely different from the previous propellants. It is composed of a large dose of nitrate (nitroglycerin, triethylene glycol, Plasticizing system composed of triol dinitrate, etc.), azide polyether (GAP, BAMO, AMMO, etc.) The network system formed by cross-linking the end of the agent is used as a scaffold, and a polymer composite rubber system is filled with a large amount of so...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/09
CPCC08J3/095C08J3/093C08J3/096C08J2371/00
Inventor 聂海英黄志萍王敏章园园刘治国赵志刚胡伟蔡如琳赵华丽马新刚
Owner HUBEI INST OF AEROSPACE CHEMOTECHNOLOGY