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Nitrine solid propellant and preparation process thereof

A kind of solid and propellant technology, applied in the direction of offensive equipment, compressed gas generation, explosives, etc., can solve the problems of insufficient mechanical properties and bonding properties, restrictions on the flexibility of the polymer main chain, and difficult mechanical properties of propellants, etc., to achieve Good aging resistance, improved tensile strength and elongation, good aging performance and energy performance

Active Publication Date: 2018-04-06
HUBEI INST OF AEROSPACE CHEMOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the presence of bulky azide side groups on the main chain of the azide polyether adhesive limits the flexibility of the polymer main chain, the lack of secondary cross-linking in the system, and inherently insufficient mechanical properties and bonding properties. The adjustment of the mechanical properties of nitrogen-based solid propellants has brought great difficulties

Method used

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  • Nitrine solid propellant and preparation process thereof
  • Nitrine solid propellant and preparation process thereof
  • Nitrine solid propellant and preparation process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] (1) Synthesis of alkynyl-terminated polyethylene glycol

[0046] Pour 0.2g of propargyl alcohol into a 250ml three-necked flask, add 2g of catalyst boron trifluoride ether, stir evenly, and slowly add 10g of ethylene oxide dropwise through a constant pressure dropping funnel under cooling in an ice-water bath, and stir for a certain period of time After that, the reaction system became viscous, and a certain amount of deionized water was added to terminate the reaction. Neutralize with 10% sodium carbonate solution to make the pH of the system = 7, then add deionized water to wash to remove impurities and low molecular weight products, heat the mixture, let it stand to separate layers, and separate the liquid through a separatory funnel. The product is dehydrated by the method of pressure distillation to obtain the product terminal alkyne group polyethylene glycol, molecular weight M n = 4450 g / mol (GPC). The structural formula is as follows:

[0047]

[0048] (2)...

Embodiment 2

[0053] (1) Synthesis of alkynyl-terminated polyethylene oxide and tetrahydrofuran copolyether

[0054] Add 2.0g of 3-butyn-1-ol, 50.0ml of tetrahydrofuran, and 3.0g of boron trifluoride·ethyl ether into a 250ml three-neck flask in turn, cool the reaction vessel to below -5°C, keep it warm for 30min, and then add dropwise to the reaction solution 50.0ml of ethylene oxide, the rate of addition is controlled so that the temperature of the reaction system does not exceed 30°C (dropping is completed in 1h to 2h), and then the reaction is continued for 3h to 6h, adding 1% aqueous alkali solution to destroy the catalyst, stirring for 15min to 30min, and standing Separate the layers, take out the oil layer, filter off the residue, remove unreacted monomer and water, obtain the product, the molecular weight is 3330g / mol (GPC), and the molecular structure of the product is as follows:

[0055]

[0056] (2) Composition of azide solid propellants

[0057]

[0058] (3) Performance o...

Embodiment 3

[0061] (1) Synthesis of alkyne-terminated polycaprolactone

[0062] Put a clean and dry 1000ml three-neck flask in an oil bath at 120°C for heating, and pass nitrogen gas to remove impurities such as moisture and oxygen in the reaction vessel. Then raise the temperature of the oil bath to 140°C-160°C, add 200ml of caprolactone monomer, 2.0ml of initiator propargyl alcohol and 1.0g of catalyst anhydrous zinc acetate, stir and react for 8 hours under nitrogen protection, and stop heating , continue stirring with nitrogen, and stop the reaction when the temperature of the reaction solution drops below 50°C. The resulting alkynyl-terminated polycaprolactone was cooled under nitrogen protection, dissolved in 200ml of chloroform, reprecipitated with 100ml of methanol, and filtered to obtain alkynyl-terminated polycaprolactone, and then dried in a vacuum oven at 50°C. Obtain product, molecular weight is 2560g / mol (GPC), and the molecular structure of product is as follows:

[0063]...

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Abstract

The invention relates to a nitrine solid propellant and a preparation process thereof. The preparation process comprises the following steps: by taking nitrine polyether glycol or polyhydric alcohol as an adhesive, nitrate as a plasticizer, terminal alkynyl polyether or terminal alkynyl polyester as an alkynyl curing agent and diisocyanate or polyisocyanate as an isocyanate curing agent, carryingout Huisgen 1,3-dipolar cycloaddition reaction on nitrinyl of a side chain of a nitrine polyether adhesive and the terminal alkynyl polyether or terminal alkynyl polyester to form a polyurethane elastomer containing a triazole ring; and introducing a Huisgen click chemosetting system based on a polyurethane curing system. The invention relates to the nitrine solid propellant. The propellant has apolyurethane curing mode and a click chemosetting mode at the same time. The prepared propellant has more excellent tensile strength and modulus on the premise of keeping relatively high elongation. The propellant has good mechanical property and structural stability.

Description

technical field [0001] The invention relates to a solid propellant, in particular to an azide solid propellant and a preparation process thereof. Background technique [0002] With the extensive application of high technology in modern warfare, the development of solid propellants has entered a new stage. In order to break through the enemy's anti-missile system and achieve the strategic goal of "effective deterrence and reliable strike", the high-efficiency, high-penetration and high-mobility capabilities of the new generation of strategic and tactical missiles require the use of higher-energy solid propellants. At present, there are three main technical approaches to improve the energy performance of solid propellants: (1) using oxidizers with higher energy performance than HMX and AP; (2) using energetic binders and energetic plasticizers; (3) using AlH 3 、BeH 2 and other metal hydrides instead of aluminum powder. In contrast, the use of energetic binders in solid prop...

Claims

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Application Information

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IPC IPC(8): C06B33/08C06B33/06C06D5/06
CPCC06B33/06C06B33/08C06D5/06
Inventor 周水平徐星星唐根吴芳李洪旭庞爱民宋会彬徐海元王艳萍
Owner HUBEI INST OF AEROSPACE CHEMOTECH
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