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A high elongation and high modulus polyether gas generating agent

A gas generating agent and high elongation technology, which is applied in the generation of compressed gas, offensive equipment, explosives, etc., can solve the problems of grain structure damage, poor mechanical properties, low elongation, etc., to improve energy and low temperature performance Excellent, good compatibility

Active Publication Date: 2018-08-07
HUBEI INST OF AEROSPACE CHEMOTECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The existing gas generating agent formulations generally focus on combustion temperature, energy and combustion performance, but the mechanical properties are poor. The propellant often has a high modulus, but the elongation is low. The grain is hard and brittle, and it is easy to damage to the structure of the grain

Method used

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  • A high elongation and high modulus polyether gas generating agent
  • A high elongation and high modulus polyether gas generating agent
  • A high elongation and high modulus polyether gas generating agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) Propellant composition (mass percent %)

[0035]

[0036] Wherein the above-mentioned functional additives include:

[0037]

[0038] (2) Propellant performance

[0039] Mechanical properties: 25°C: ε m =110.3%, E=5.8MPa, σ m =0.92MPa; 70℃: ε m =52.3%, -40°C: ε m = 350%

[0040] Residue content: 2.0%

[0041] Measured combustion temperature: 1645K

[0042] Combustion performance: r (6.86MPa) = 8.3mm / s, n = 0.28 (3-9MPa)

[0043] Theoretical specific impulse: 1995.5N.s / kg

Embodiment 2

[0045] (1) Propellant composition (mass percent %)

[0046]

[0047] Wherein the above-mentioned functional additives include:

[0048]

[0049] (2) Propellant performance

[0050] Mechanical properties: 25°C: ε m =150.3%, E=4.7MPa, σ m =0.83MPa; 70℃: ε m =65.5%; -40°C: ε m =410%

[0051] Residue content: 2.3%

[0052] Measured combustion temperature: 1615K

[0053] Combustion performance: r(6.86MPa)=7.5mm / s, n=0.23(3-9MPa)

[0054] Theoretical specific impulse: 1984.7N.s / kg

Embodiment 3

[0056] (1) Propellant composition:

[0057]

[0058] Wherein the above-mentioned functional additives include:

[0059]

[0060] (2) Propellant performance

[0061] Mechanical properties: 25°C: ε m =226.3%, E=3.0MPa, σ m =0.65MPa; 70℃: ε m =101.5%; -40°C: ε m =430%

[0062] Residue content: 2.4%

[0063] Measured combustion temperature: 1586K

[0064] Combustion performance: r(6.86MPa)=7.1mm / s, n=0.27(3-9MPa)

[0065] Theoretical specific impulse: 1978.6N.s / kg

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Abstract

The invention relates to a high-elongation-percentage and high-modulus polyether combustion gas generating agent, which comprises the following components in weight percentage: 15-35% of ethylene oxide-tetrahydrofuran copolyether PET as a binder, 4-12% of plasticizer, 40-65% of main oxidant, 0-40% of auxiliary oxidant, 1-2% of isocyanate compound as a curing agent, 0.2-0.7% of mechanical property regulator, 0.5-1.0% of combustion performance regulator, and 0.5-0.8% of functional auxiliary agent. The combustion gas generating agent is high in elongation rate, high in modulus, high in energy, low in combustion temperature and small in residue. The initial modulus(E) of a propellant at 25 DEG C is larger than or equal to 3.0 MPa, and the elongation percentage thereof (epsilon m) is larger than or equal to 100%. Meanwhile, the elongation percentage of the propellant (epsilon m) at 70 DEG C is larger than or equal to 50%, and the elongation percentage of the propellant (epsilon m) at -40 DEG C is larger than or equal to 200%. Therefore, the performance of the high-elongation-percentage and high-modulus polyether combustion gas generating agent is far better than that of a conventional combustion gas generating agent. The high-elongation-percentage and high-modulus polyether combustion gas generating agent is particularly applicable to auxiliary power equipment high in requirement on ammunition mechanics, energy, combustion temperature and residues, wherein the combustion gas generating agent is adopted as the power source of the auxiliary power equipment.

Description

technical field [0001] The invention relates to a high-elongation and high-modulus polyether gas generating agent, in particular to a polyether gas generating agent with excellent mechanical properties and relatively high elongation and modulus, belonging to the technical field of solid propellants. Background technique [0002] Solid gas generating agent is a kind of special propellant widely used in auxiliary power units of aerospace and missile systems. Auxiliary power devices using solid gas generating agents as energy sources, such as kinetic energy interceptors, thrust vector control servo systems, etc., require not only high energy, but also low combustion temperature, low residue, and excellent mechanical properties of the gas generating agent Features. After decades of development, the traditional double-base drug is relatively mature and has been widely used in the field of auxiliary power devices with gas generators as the power source. However, the mechanical pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C06B31/48C06B31/32C06B45/10C06D5/06
CPCC06B31/32C06B31/48C06B45/10C06D5/06
Inventor 李伟潘新洲汪越尹欣梅王小英张林唐泉
Owner HUBEI INST OF AEROSPACE CHEMOTECHNOLOGY
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