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A kind of alkynylated neutral polymer bonding agent, preparation method and propellant

A polymer and bonding agent technology, applied in offensive equipment, non-explosive/non-thermal agent components, explosives, etc., can solve the problems of inability to further improve the mechanical properties of propellants, weak interactions, and inability to improve polymer chain interactions. , to achieve the effect of improving modulus and tensile strength, enhancing physical reinforcement, and improving modulus and strength

Active Publication Date: 2021-09-07
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 bonding agents cannot improve the interaction between polymer chains and thus cannot further improve the mechanical properties of the propellant

Method used

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  • A kind of alkynylated neutral polymer bonding agent, preparation method and propellant
  • A kind of alkynylated neutral polymer bonding agent, preparation method and propellant
  • A kind of alkynylated neutral polymer bonding agent, preparation method and propellant

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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 alkynylated neutral polymer bonding agent, a preparation method and a propellant. The present invention is the first to prepare an alkynylated neutral polymer bonding agent, and the molecular structure simultaneously contains a hydroxyl group, an alkynyl terminal group, and a cyano group. and other three groups, the cyano group in the molecular chain is adsorbed on the surface of the nitramine filler to form a polymer shell insoluble in nitrate ester, which inhibits the dissolution of the nitramine filler by plasticizers such as nitrate ester, and enhances the solubility of the nitramine filler. The physical strengthening effect improves the modulus and strength of the composite material; the hydroxyl group enters the cross-linked curing network system through the isocyanate curing agent to enhance the interaction between the adhesive and the nitramine solid filler; the alkynyl group and the azide adhesive molecule The azide group undergoes a click reaction, which enhances the interaction between the adhesive molecule and the bonding agent and the adhesive molecule. The three interactions can significantly enhance the interaction between the filler and the binder matrix, and significantly improve the modulus 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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Patent Type & Authority Patents(China)
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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