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Azide nitric acid ester oligomer and preparing method thereof

A nitrate ester and oligomer technology, which is applied in the field of azide nitrate ester oligomers, can solve the problems of narrow application range of plasticizers, achieve wide plasticization range, low glass transition temperature, and reduce plasticizer migration The effect of sexual problems

Active Publication Date: 2016-06-15
XIAN MODERN CHEM RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, due to the difference in solubility parameters, the application range of the above-mentioned oligomer energetic plasticizers is narrow, and they can only be combined with adhesives with similar chemical structures and similar solubility parameters to form a plasticizing system.
For example, azide oligomers can only be used as energetic plasticizers for azide-based adhesives, and nitrate-based oligomers can only be used as energetic plasticizers for nitrate-based adhesives

Method used

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  • Azide nitric acid ester oligomer and preparing method thereof
  • Azide nitric acid ester oligomer and preparing method thereof
  • Azide nitric acid ester oligomer and preparing method thereof

Examples

Experimental program
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Embodiment 1

[0027] 1 Synthesis of PAMNMO-ET

[0028] 1.1 Synthesis of intermediate PAMNMO-OH

[0029] Add 13.8g (0.3mol) of ethanol and 200mL of dichloromethane in sequence into a 500mL four-necked flask equipped with a mechanical stirrer, a thermometer, a dropping funnel, and a reflux device. After stirring and dispersing for 10 minutes, add 1.8.mL (0.15mol) of trifluoro Boron ether ether complex, stirred and reacted at room temperature for 30 minutes, then cooled the system to 10°C to 12°C, and added 169.2g (0.9mol) 3-azidomethyl-3-nitratemethyl dropwise through the dropping funnel For oxetane, control the polymerization reaction temperature at 12°C to 15°C during the dropwise addition, and react at room temperature for 6 hours after the dropwise addition is completed. After the reaction is completed, use 100 mL of 5% sodium carbonate aqueous solution to terminate the polymerization reaction, inject the mixture into a separatory funnel for static layering, separate the lower oil phase,...

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Abstract

The invention discloses azide nitric acid ester oligomer.Please see the structure formula in the description.Glass transition temperature is low, volatility is small, and the problem of plasticizer mobility in the application and storage processes of explosives can be reduced effectively; moreover, an azide group and a nitric acid ester group exist in the molecule structure, the nitrogen and oxygen content is high, the decomposing enthalpy content is high, and the oligomer can serve as plasticizer for thermosetting energetic binder such as azide poly ether and nitric acid ester and serve as plasticizer for thermoplastic energetic binder nitro-cotton.The oligomer is mainly used in energetic binder of solid propellants and PBX explosives.

Description

technical field [0001] The invention relates to an azide nitrate ester oligomer, which is suitable for energetic plasticizers of solid propellants and PBX explosives. Background technique [0002] Oligomers specifically refer to low molecular weight polymers with a degree of polymerization of less than 10. [0003] Due to the small molecular weight and high volatility of commonly used energetic plasticizers, the migration speed in the propellant and explosive formula is fast, which often affects the long-term storage performance of the formula, especially the mechanical properties and safety performance. In recent years, a batch of polyether oligomers with energy groups have been produced abroad by using oxygen heterocyclic monomers of energetic binders as raw materials and undergoing two-step reactions of cationic ring-opening polymerization and end group modification. Due to the large molecular weight of this oligomer, the volatility and migration are very small, which ca...

Claims

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Application Information

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IPC IPC(8): C07C247/04C06B23/00
CPCC06B23/00C07C247/04
Inventor 李娜赵凤起轩春雷高红旭莫洪昌梁勇肖立柏曲文刚王瑛陈雪莉
Owner XIAN MODERN CHEM RES INST