Azido composite solid propellant containing combined stabilizer

A solid propellant and stabilizer technology, applied in the direction of non-explosive stabilizers, offensive equipment, non-explosive/non-thermal agent components, etc., can solve the problems of reduced maximum elongation and large change rate of mechanical properties, and achieve slowing down of mechanical properties. Performance change rate and effect of extending service life

Active Publication Date: 2018-02-23
HUBEI INST OF AEROSPACE CHEMOTECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Experimental studies have found that the azide-based composite solid propellant plasticized with nitrate esters has good chemical stability and stable combustion performance during storage. The disadvantage is that the rate of change in mechanical properties is relatively large. The strength increases, the maximum elongation decreases, and the change rate of the two is greater than 40% after three months of accelerated aging at 70°C. According to the conventional accelerated aging test, the storage life of the propellant is estimated to be about 5 years.

Method used

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  • Azido composite solid propellant containing combined stabilizer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] (1) Propellant composition

[0059] components

gaps

NG / BTTN=1 / 1

AP

RDX

Al

TPB

NPBA

mass (g)

90

180

150

400

180

0.5

2

components

TEA

stabilizer

LM-100

mass (g)

0.5

3

5

[0060] The ratio of stabilizer MNA, 2-NDPA, 4020 and carbon black N330 is 1.5:1:0.5:0.5.

[0061] (2) Mechanical properties of propellant at 70°C for three months

[0062] Mechanical properties (initial): 25℃σ m =0.90MPa, ε m =55%

[0063] Mechanical properties (70°C for three months): 25°Cσ m =0.95MPa, ε m = 50%

[0064] Maximum tensile strength (σ m ) rate of change: +6%

[0065] Maximum elongation (ε m ) rate of change: -9%

Embodiment 2

[0067] (1) Propellant composition

[0068] components

gaps

TEGDN

AP

CL-20

Al

TPB

NPBA

mass (g)

70

180

100

600

50

0.5

2

components

glycerin

stabilizer

LM-100

TDI

mass (g)

0.5

6

5

5

[0069] The ratio of stabilizer MNA, 2-NDPA, 4020 and carbon black N330 is 2.5:1.5:1:1.

[0070] (2) Mechanical properties of propellant at 70°C for three months

[0071] Mechanical properties (initial): 25℃σ m =0.84MPa, ε m =75%

[0072] Mechanical properties (70°C for three months): 25°Cσ m =0.80MPa, ε m =85%

[0073] Maximum tensile strength (σ m ) rate of change: -5%

[0074] Maximum elongation (ε m ) rate of change: +13%

Embodiment 3

[0076] (1) Propellant composition

[0077] components

gaps

TMETN

AP

CL-20

Al

TPB

NPBA

mass (g)

100

160

300

250

190

0.5

2

components

TMP

stabilizer

LM-100

MDI

mass (g)

0.7

5

5

5

[0078] The ratio of stabilizer MNA, 2-NDPA, 4020, and carbon black N330 is 2:1:0.5:1.

[0079] (2) Mechanical properties of propellant at 70°C for three months

[0080] Mechanical properties (initial): 25℃ σ m =0.85MPa, ε m =77%

[0081] Mechanical properties (three months at 70°C): σ at 25°C m =0.80MPa, ε m = 65%

[0082] Maximum tensile strength (σ m ) rate of change: -6%

[0083] Maximum elongation (ε m ) rate of change: -16%

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Abstract

The invention relates to an azido composite solid propellant containing a combined stabilizer. The azido composite solid propellant is prepared from the following components in parts by weight: 7% to12.5% of adhesive, 11% to 18% of plasticizer, 10% to 73% of oxidant, 0% to 60% of energy-containing explosive, 5% to 19% of metal fuel, 0.5% to 1.0% of curing agent, 0.05% of curing catalyst, 0.3% to0.6% of stabilizer, 0.2% of bonding agent, and 0.05% to 0.1% of crosslinking agent. The azido composite solid propellant containing the combined stabilizer has the advantages that the storage propertyis good, and the change rate of mechanical property in the storage process is smaller than 20%.

Description

technical field [0001] The invention belongs to the field of composite solid propellants, in particular to an azide-based composite solid propellant containing a combined stabilizer. Background technique [0002] Energetic materials are the source of power and power of weapons, and the material basis for weapon systems to achieve long-range precision strikes and efficient damage. Among energetic materials, the most important use of polymers is as adhesives. Adhesive is an important part of energetic materials. It is the matrix and skeleton of energetic materials. Only other components can be bonded together, so that the energetic material maintains a certain geometric shape and good mechanical properties. In addition, it also provides C, H, O, N and other elements required for combustion of energetic materials at the same time, which has an important impact on the energy performance, combustion performance, and aging performance of energetic materials. [0003] The resear...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C06B33/08C06B23/00C06B45/08
CPCC06B23/006C06B23/009C06B33/08C06B45/08
Inventor 吴芳周水平徐星星胡翔唐根徐海元宋会彬周晓杨王艳萍杨斌
Owner HUBEI INST OF AEROSPACE CHEMOTECHNOLOGY
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