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Modulus modifier, preparation method and application thereof

A regulator and modulus technology, applied in the direction of offensive equipment, non-explosive/non-thermal agent components, explosives, etc., can solve the problems of low elongation rate of propellant and unsatisfactory elongation rate, and achieve effective and controllable sequence structure , Improve the modulus and strength, and the effect of excellent performance

Active Publication Date: 2020-12-18
HUBEI INST OF AEROSPACE CHEMOTECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the covalent bond between the bonding agent or coupling agent and the adhesive, the interaction between the two is strong, resulting in a relatively low elongation of the propellant, which cannot meet the requirements of maintaining a high elongation. Dual requirements for increasing tensile strength and modulus

Method used

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  • Modulus modifier, preparation method and application thereof
  • Modulus modifier, preparation method and application thereof
  • Modulus modifier, preparation method and application thereof

Examples

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preparation example Construction

[0041] The preparation method of modulus regulator of the present invention specifically comprises the steps:

[0042](1) According to the ratio of substances, add 1,000 to 10,000 parts of solvent and 1 to 10 parts of free radical initiator in the reaction vessel, stir and dissolve to obtain a mixed solution; the solvent is methanol, ethanol, ethyl acetate or methyl acetate One or a mixture of any two; the free radical initiator is one of azobisisobutyronitrile AIBN or dibenzoyl peroxide BPO.

[0043] (2) Add 10-1000 parts of acrylonitrile monomer and 1-10 parts of reversible addition-fragmentation transfer reagent RAFT to the mixed solution under nitrogen or inert gas atmosphere, and react at 40-90°C for 5-20 Hours; heating can use oil bath heating;

[0044] (3) Add 10 to 200 parts of polyethylene glycol diacrylate or polyethylene glycol dimethacrylate to the mixed solution in step (2), stir and dissolve, and lower the temperature of the mixed solution under nitrogen or an i...

Embodiment 1

[0055] Select a four-necked flask (2L) equipped with magnetic stirring, reflux condenser, thermometer and addition funnel, etc., add 500ml of ethyl acetate and 0.328g of azobisisobutyronitrile AIBN into the four-necked flask, stir and dissolve to obtain a mixed solution.

[0056] Add 21.2g of acrylonitrile monomer and 0.449g of CPDB to the mixed solution under nitrogen atmosphere, and heat the reaction in an oil bath at 75°C for 20 hours under the protection of argon.

[0057] 0.328g AIBN, 0.449g CPDB, and 21.2g acrylonitrile (molar ratio=1:1:400) were added thereto.

[0058] Add 40g of polyethylene glycol diacrylate (Mn=400, molar ratio (acrylonitrile:polyethylene glycol diacrylate)=400:100)) to the reaction solution, stir to dissolve, and store at 75°C under the protection of argon. The bath was left to react for 20 hours.

[0059] 21.2 g of acrylonitrile and 0.449 g of CPDB were added to the reaction vessel, and the reaction was continued for 20 hours in an oil bath at 75°...

Embodiment 2

[0068] Select a four-necked flask (2L) equipped with magnetic stirring, reflux condenser, thermometer and addition funnel, etc., add 500ml of methyl acetate and 0.485g of dibenzoyl peroxide BPO into the four-necked flask, stir and dissolve to obtain a mixed solution.

[0069] Add 26.5g of acrylonitrile monomer and 0.545g of CPDE to the mixed solution under nitrogen atmosphere, and heat in an oil bath at 55°C for 20 hours under the protection of argon.

[0070] 0.485g BPO, 0.545g CPDE, and 26.5g acrylonitrile (molar ratio=1:1:500) were added thereto.

[0071] Add 75g of polyethylene glycol dimethacrylate (Mn=750, molar ratio (acrylonitrile:polyethylene glycol diacrylate)=500:100)) to the reaction solution, in a 55°C oil bath under the protection of argon The reaction was continued for 20 hours.

[0072] 26.5 g of acrylonitrile and 0.545 g of CPDE were added to the reaction vessel, and the reaction was continued for 20 hours in an oil bath at 55° C. under the protection of argo...

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Abstract

The invention relates to a modulus regulator, a preparation method and application thereof, obtaining block polymer modulus regulator PAN-b-PEG-b-PAN by preparation for the first time, wherein PAN section in molecular chain is adsorbed on the surface of nitramine filler to form a polymer shell not dissolved in nitrate, which inhibits the dissolution of plasticizers of nitrate and the like to nitramine filler, reinforces the physical potentiation of nitramine filler and improves the modulus and intensity of composite materials; PEG chain section in the molecular chain is well compatible with polyether adhesive, which has physical interactions with adhesive matrix network, so as to facilitate the molecule of modulus regulator to be effectively dispersed in curing system. Based on the premiseof not affecting elongation of the propellant, the interaction between PEG chain section and polyether adhesive reinforces the effect between the filler and the adhesive matrix, which can obviously improve the modulus and strength of extension of composite propellant.

Description

technical field [0001] The invention relates to a modulus regulator, a preparation method and its application, in particular to a functional additive for improving the mechanical properties of an azide polyether / nitroamine composite solid propellant and a preparation method thereof, belonging to solid propellant technology field, Background technique [0002] Azide polyether / nitroamine composite solid propellant is a propellant with azide polyether (such as azide glycidyl ether) as binder and metal powder, energetic oxidant, high-energy ammonium nitrate explosive, etc. as solid filler. Composite polyurethane polymer material. The mechanical properties of solid propellants, especially the tensile strength and modulus, are key parameters that determine the structural integrity and aging performance of solid rocket motors. Azide adhesives, such as azide glycidyl ether, poly 3,3-bis(azidomethyl)butylene oxide and tetrahydrofuran copolyether, etc., contain a large number of azi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F293/00C08F220/44C08F222/20C06B33/08C06B23/00
CPCC06B23/009C06B33/08C08F220/44C08F222/1006C08F293/005C08F2438/03C08F222/1063
Inventor 周水平唐根吴芳宋会彬徐星星周晓杨王艳萍胡翔
Owner HUBEI INST OF AEROSPACE CHEMOTECHNOLOGY
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