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Thermoplastic composite solid propellant and preparation method thereof

A solid propellant and thermoplastic technology, applied in the direction of offensive equipment, non-explosive/non-thermal agent components, explosive processing equipment, etc., can solve the problems of danger, poor low temperature resistance, etc., to reduce process costs and performance stability Good, fast vulcanization effect

Active Publication Date: 2022-04-05
HUBEI INST OF AEROSPACE CHEMOTECHNOLOGY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen from the above patents that the processing temperature must be above 75°C, the processing may still be dangerous, and the low temperature resistance is poor. For example, ethylene-vinyl acetate copolymer cannot be used below -40°C

Method used

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  • Thermoplastic composite solid propellant and preparation method thereof
  • Thermoplastic composite solid propellant and preparation method thereof
  • Thermoplastic composite solid propellant and preparation method thereof

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preparation example Construction

[0045] A preparation method of thermoplastic composite solid propellant, comprising:

[0046] (1) The first method: heat the thermoplastic adhesive, add oxidant, plasticizer, metal fuel, sulfur, thiocarbamate and additives to the heated thermoplastic adhesive, and use the instant The mixer continues to heat and stir to form a uniform slurry, pour the above slurry, and let it stand for molding to obtain a low-melting point thermoplastic composite solid propellant; in the above steps, the heating temperature is 65-75°C; the stirring time is 40-150min ; When pouring, the slurry is poured into the mold or into the engine by vacuum spraying, and then rapidly self-crystallized at room temperature.

[0047] (2) The second method: use a vertical mixer to mix thermoplastic adhesives, oxidizers, plasticizers, metal fuels, sulfur, thiocarbamate and additives to obtain a uniform slurry and prepare it into a standard material The strips are transported to the screw extrusion molding devic...

Embodiment 1

[0051] A thermoplastic composite solid propellant, based on the calculation of the total mass of the solid propellant as 100%, the mass percentage of each component is:

[0052] Oxidant (ammonium perchlorate): 70%;

[0053] Oxidant (Hexogen): 4%

[0054] Metal fuel (spherical aluminum powder): 13%;

[0055] Thermoplastic binder (trans-1,4-polyisoprene): 6%;

[0056] Plasticizer (high 1,2 polybutadiene): 6%;

[0057] Sulfur: 0.2%;

[0058] Thiocarbamate: 0.5%;

[0059] Auxiliary agent (lithium fluoride): 0.3%.

[0060] The thermoplastic adhesive is trans-1,4-polyisoprene, composed of two elements C and H, the glass transition temperature is -73°C, the melting point is in the range of 55-60°C, and the number average molecular weight is between 1000~2000;

[0061] The plasticizer is liquid high 1,2 polybutadiene, the content of 1,2 structure in high 1,2 polybutadiene is higher than 90%, and the number average molecular weight is between 1500 and 2000;

[0062] The prepara...

Embodiment 2

[0072] A thermoplastic composite solid propellant, based on the calculation of the total mass of the solid propellant as 100%, the mass percentage of each component is:

[0073] Oxidant (ammonium perchlorate): 60%;

[0074] Metal fuel (spherical aluminum powder): 13%;

[0075] Metal fuel (spherical aluminum-magnesium alloy powder): 4%;

[0076] Thermoplastic binder (mixture of trans-1,4-polyisoprene and acetylene black): 10.5%;

[0077] Plasticizer (high 1,2 polybutadiene): 11%;

[0078] Sulfur: 0.2%;

[0079] Thiocarbamate: 0.3%;

[0080] Additives: 1.0%.

[0081] The thermoplastic adhesive is trans-1,4-polyisoprene, composed of two elements C and H, the glass transition temperature is -73°C, the melting point is in the range of 55-60°C, and the number average molecular weight is between 2500~4000;

[0082] The plasticizer is liquid high 1,2 polybutadiene, the content of 1,2 structure in high 1,2 polybutadiene is higher than 90%, and the number average molecular weight...

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Abstract

The invention discloses a thermoplastic composite solid propellant and a preparation method thereof. The propellant comprises the following components in percentage by mass: 58-75% of an oxidizing agent; 8%-20% of metal fuel; 5%-15% of a thermoplastic adhesive; 0.2% to 12% of high 1, 2-polybutadiene; 0.2%-0.8% of sulfur; 0.2% to 0.8% of thiocarbamate; the thermoplastic polymer adhesive can be trans-1, 4-polyisoprene or a mixture of the trans-1, 4-polyisoprene and acetylene black, and the thermoplastic polymer adhesive can be a mixture of the trans-1, 4-polyisoprene and acetylene black. The propellant provided by the invention can realize melt mixing and molding at a relatively low temperature, and complete rapid crystallization molding at room temperature, and meanwhile, the solid propellant of the type can be recycled, so that the processing difficulty and the production cost are reduced. Compared with a current thermoplastic propellant, the melting mixing temperature of the propellant is lower than 20 DEG C, and meanwhile, the low-temperature mechanical property of the propellant is remarkably superior to that of the current thermoplastic propellant.

Description

technical field [0001] The invention relates to a thermoplastic composite solid propellant and a preparation method thereof, belonging to the technical field of composite solid propellant preparation. Background technique [0002] At present, the composite solid propellants widely used in China are thermosetting propellants. Although this type of propellant has high energy and mature production technology, the waste products and expired products can only be disposed of by combustion, which causes A great waste is caused, and the production cost of the propellant is also increased. The thermoplastic propellant "green" solid propellant with plasticizer as binder has excellent mechanical properties and reproducible performance. Propellant maximized recycling. It is generally believed that an ideal plasticizer for composite solid propellants should have the following characteristics: 1) The melting temperature range is between 70 and 120 ° C. If the melting temperature is too ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C06B33/12C06B45/10C06B23/00C06D5/06C06B21/00
Inventor 吴世曦陈炉洋周重洋郑雷曹兰王萌臧晓燕
Owner HUBEI INST OF AEROSPACE CHEMOTECHNOLOGY
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