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A kind of composite solid propellant and its preparation method and processing method

A solid propellant and curing agent technology, which is applied in the direction of offensive equipment, explosive composite components, explosive processing equipment, etc., can solve the problem that the covalently bonded three-dimensional cross-linked solid propellant is difficult to dissociate, and achieve efficient recovery and efficient utilization Effect

Active Publication Date: 2020-08-11
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that conventional covalently bonded three-dimensional cross-linked solid propellants are difficult to dissociate, and propose a composite solid propellant and its preparation method and treatment method

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  • A kind of composite solid propellant and its preparation method and processing method

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preparation example Construction

[0068] The preparation method of terminal triazolyl polybutadiene is:

[0069] 1) Dissolve 100g of alkyne-terminated polybutadiene in 200mL of n-heptane solvent, place in a 500mL three-necked flask equipped with a stirring device and nitrogen protection, add 1.31g of sodium ascorbate, 0.527g of CuSO 4 , stir evenly;

[0070] 2) Add 8.788g of benzyl azide equivalent to the molar equivalent of the terminal alkynyl group in step 1) into the container of step 1); [or methyl 2-azidoacetate (7.597g)]

[0071] 3) React the mixed solution of step 2) at 50° C. under stirring conditions for 4 hours, cool down, and remove the nitrogen protection;

[0072] 4) The reaction mixture obtained in step 3) was extracted three times with 50 mL of distilled water, and about 95 g of terminal triazolyl polybutadiene prepolymer was obtained after rotary evaporation and drying.

[0073] Product infrared analysis showed that 3306cm -1 The infrared absorption peak of the terminal alkyne group disappe...

Embodiment 1

[0106] Put 20g of triazolyl-terminated polyethylene oxide tetrahydrofuran copolyether into a dry beaker to ensure that the molar number of triazole groups is equivalent to the molar number of bromine atoms, add 1.012g of corresponding tribromoneopentyl alcohol curing agent, and stir uniform. Then it was vacuum casted into a tetrafluoroethylene mold and cured at 90° C. for 6 days to obtain a triazolium ion-crosslinked polyethylene oxide tetrahydrofuran copolyether elastomer. The mechanical tensile strength of the elastic body at 20° C. is 1.25 MPa, and the elongation is 130%.

[0107] After soaking 1 g of the obtained elastomer in 5 g of 1-bromopentane solvent, the elastomer was completely dissolved after 5 days and became liquid.

[0108] Put 9g of triazolyl-terminated polyethylene oxide tetrahydrofuran copolyether and 5g of A3 (equal mass ratio mixture of 2,2-dinitropropanol formal and 2,2-dinitropropanol acetal) into a dry In the beaker, add 35g cyclotrimethylenetrinitrami...

Embodiment 2

[0111] Put 20g of triazole-terminated polyethylene oxide tetrahydrofuran copolyether into a dry beaker to ensure that the moles of triazole groups are equivalent to the moles of bromine atoms, 0.285g of 1,6-dibromohexane, 0.285g of tribromo Neopentyl alcohol 0.759g mixed with curing agent, stirred evenly. Then it was vacuum casted into a tetrafluoroethylene mold and cured at 90° C. for 6 days to obtain a triazolium ion-crosslinked polyethylene oxide tetrahydrofuran copolyether elastomer. The mechanical tensile strength of the elastic body at 20° C. is 1.05 MPa, and the elongation is 150%.

[0112] After soaking 1 g of the elastomer in 5 g of 1-bromooctane solvent, the elastomer was completely dissolved after 5 days and became liquid.

[0113] Put 10g of triazolyl-terminated polyethylene oxide tetrahydrofuran copolyether, 6g of A3 (equal mass ratio mixture of 2,2-dinitropropanol formal and 2,2-dinitropropanol acetal) into a dry in a beaker, stir well. Then add 35g of cyclote...

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Abstract

The invention relates to a novel composite solid propellant as well as a preparation method and a treatment method thereof, and belongs to the technical field of composite solid propellants. The invention belongs to the technical field of composite solid propellants. A triazole-terminated prepolymer reacts with a halide to generate the triazolium group three-dimensional cross-linked polymer elastic material. The elastomer has a stable chemically crosslinked network. Different from conventional covalent bond cross-linked polymer elastomers, the triazolium ion cross-linked polymer elastomer canbe subjected to ion exchange reaction when encountering a monobasic halogenated compound, so that a three-dimensional cross-linked network is dissociated. When the elastomer is used for preparing thesolid composite propellant, polymer cross-linked network dissociation can be realized, the elastomer is changed from a solid state to a liquid state, and efficient recovery and utilization of the waste solid composite propellant are realized.

Description

technical field [0001] The invention relates to a composite solid propellant and a preparation method and a treatment method thereof, belonging to the technical field of composite solid propellants. Background technique [0002] As the power source of solid rocket motor, composite solid propellant not only needs to meet the energy demand of solid rocket motor; at the same time, as an engineering component, composite solid propellant also needs to have certain mechanical properties in a wide temperature range to meet the requirements of different working environments . Composite solid propellant is a composite material with polymer cross-linked network elastomer as the continuous phase and solid filler as the dispersed phase, in which the polymer continuous phase is the matrix that carries the mechanical properties of the composite solid propellant; the mechanical properties are stable, good polymerization Bioelastomers are the prerequisite for the preparation of high-perfor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C06B33/12C06B33/08C06B33/06C06B21/00C08C19/22C08G65/331
CPCC06B21/0008C06B21/0083C06B33/06C06B33/08C06B33/12C08C19/22C08G65/3312
Inventor 翟进贤郭晓燕
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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