Alkylated neutral polymer bonding agent, preparation method and propellant

A polymer and bonding agent technology, applied in the field of alkynylated neutral polymer bonding agent, preparation method and propellant, can solve the problem that the mechanical properties of the propellant cannot be further improved, the interaction of polymer chains cannot be improved, and the interaction is weak and other issues, to achieve the effect of improving modulus and tensile strength, improving modulus and strength, and enhancing physical reinforcement

Active Publication Date: 2019-05-28
HUBEI INST OF AEROSPACE CHEMOTECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, compared to PEG or PET adhesives, azide polyether adhesives have weak interchain interactions
Traditional neutral polymeric bon...

Method used

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  • Alkylated neutral polymer bonding agent, preparation method and propellant
  • Alkylated neutral polymer bonding agent, preparation method and propellant
  • Alkylated neutral polymer bonding agent, preparation method and propellant

Examples

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preparation example Construction

[0043] The preparation method of the neutral polymer bonding agent of alkynylation of the present invention specifically comprises the steps:

[0044] (1) According to the ratio of substances, add 1,000 to 10,000 parts of N,N-dimethylformamide (DMF), 1 to 10 parts of catalyst, 10 to 100 parts of terminal alkynyl alcohol, 50 to 80 parts °C and stirred to dissolve to obtain a mixed solution. The catalyst is one of triphenylbismuth, triethoxyphenylbismuth and organotin. The alkynyl alcohol is any one of 3-butyne-1-ol, 2-methyl-3-butyne 2-ol, propynyl alcohol or ethoxy propynyl alcohol or a mixture of any two.

[0045] (2) Add 10 to 100 parts of toluene diisocyanate (TDI) to the mixed solution under a nitrogen or inert gas atmosphere. The amount of the alkynyl alcohol is the same as that of the toluene diisocyanate. Reaction for 5-10 hours;

[0046] (3) Add 10 to 100 parts of neutral polymer bonding agent to the mixed solution in step (2), stir and dissolve, and continue to rea...

Embodiment 1

[0049] Select a three-necked flask (2L) equipped with magnetic stirring, reflux condenser, thermometer and addition funnel, etc., add 100ml DMF, 0.10g triethoxyphenyl bismuth to the four-necked flask under nitrogen atmosphere, and then add 2.0g triethoxyphenyl bismuth to the solution Ethoxypropynyl alcohol was stirred at 60°C for 30 minutes to dissolve to obtain a mixed solution. Then, 3.475g of toluene diisocyanate (TDI) was added to the above-mentioned mixed solution under an inert gas atmosphere, and reacted for 10 hours at 70°C; after that, 15.0g of neutral polymer bonding agent NPBA (Mn=2510, D: 1.45), stirred and dissolved, and continued to react for 20 hours at 60°C; after the reaction, the above-mentioned mixed solution was slowly added dropwise in 1000ml of glacial ethanol, and the alkynylated neutral polymer bonding agent generated by the reaction was obtained from glacial ethanol Precipitate out, vacuum filter, and use a large amount of ice ethanol to wash and filte...

Embodiment 2

[0057] Select a three-necked flask (2L) equipped with magnetic stirring, reflux condenser, thermometer and addition funnel, etc., add 100ml DMF, 0.15g triphenylbismuth to the four-necked flask under nitrogen atmosphere, and then add 0.50g 3-butyl bismuth to the solution Alkyn-1-ol was dissolved by stirring at 80°C for 30 minutes to obtain a mixed solution. Then add 1.24g toluene diisocyanate (TDI) to the above-mentioned mixed solution under nitrogen or an inert gas atmosphere, and react for 10 hours at 70°C; after that, add 15.0g neutral polymer bonding agent NPBA (Mn= 2510, D: 1.45), stirred and dissolved, and continued to react at 80°C for 15 hours; after the reaction, the above mixed solution was slowly added dropwise to 2000ml ice methanol, and the alkynylated neutral polymer bonding agent generated by the reaction was from Precipitate in ice ethanol, vacuum filter, wash and filter the product with a large amount of ice methanol solution, and dry in vacuum to obtain alkyny...

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Abstract

The invention relates to an alkylated neutral polymer bonding agent, a preparation method and a propellant. The alkylated neutral polymer bonding agent is prepared by the invention for the first time;a molecular structure contains three groups including hydroxyl, terminated alkynyl, cyano and the like; in a molecular chain, the cyano is adsorbed on the surface of nitramine filler to form a polymer shell layer which is not dissolved in nitrate, and the dissolving of plasticizers including the nitrate and the like on the nitramine filler is inhibited; the physical enhancing effect of the nitramine filler is reinforced, and the modulus and strength of a composite material are improved; the hydroxyl enters a crosslinking curing network system through an isocyanate curing agent to enhance theeffect between a bonding agent and the nitramine solid filler; the alkynyl and azido of an azido adhesive molecule are subjected to click reaction to enhance the mutual effects between the adhesive molecule and the bonding agent and the adhesive molecule. The three mutual effects can be used for remarkably enhancing the effect between the filler and an adhesive matrix, and remarkably improving themodulus and tensile strength of the composite propellant.

Description

technical field [0001] The invention relates to an alkynylated neutral polymer bonding agent, a preparation method and a propellant, in particular to a functional auxiliary agent for improving the mechanical properties of azide polyether / nitroamine composite solid propellants and a preparation method thereof. It belongs to the technical field of solid propellants. Background technique [0002] Azide polyether composite solid propellant is a polyurethane polymer composite material with hydroxyl-terminated azide polyether as binder and metal aluminum powder, oxidant, high-energy nitramine explosives, etc. as solid filler. The mechanical properties of solid propellants, especially the tensile strength and maximum elongation are the key indicators to determine the structural integrity of solid rocket motors and the aging performance of propellants. Azide polyether adhesives, such as glycidyl azide (GAP), poly 3,3-bis(azidomethyl)butylene oxide (PBAMO), poly 3,3-bis(azidomethyl)...

Claims

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Application Information

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IPC IPC(8): C08F8/30C08F220/44C08F220/10C08F220/20C06B23/00C06B33/08C06D5/06
Inventor 周水平唐根吴芳宋会彬庞爱民王艳萍徐星星周晓杨胡翔
Owner HUBEI INST OF AEROSPACE CHEMOTECHNOLOGY
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