GAP-based thermoplastic propellant and preparation method thereof

A thermoplastic and propellant technology, applied in the field of solid propellants, can solve the problems of complex production process, high production cost, long heat preservation and curing cycle, etc., and achieve the effects of excellent mechanical properties at room temperature, saving production energy consumption, and reducing safety risks

Active Publication Date: 2020-09-04
HUBEI SANJIANG AEROSPACE JIANGHE CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main disadvantages of its manufacturing process are: (1) The solid propellant is formed by chemical cross-linking, and the propellant performance is easily affected by the environment; (2) There are problems such as the manufacturing mode is limited by the space size, and the expired grain is difficult to recycle; (3) The production process is complicated, the heat preservation and curing cycle is long, and the production cost is high
Compared with inert thermoplastic elastomers (TPE), energetic thermoplastic elastomers (ETPE) have the advantages of high oxygen content, high density, and high enthalpy of formation, but there are currently no mature products for ETPE

Method used

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  • GAP-based thermoplastic propellant and preparation method thereof
  • GAP-based thermoplastic propellant and preparation method thereof
  • GAP-based thermoplastic propellant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The specific formulation and performance of the GAP-based thermoplastic propellant are shown in Table 1 below.

[0031] Table 1

[0032]

[0033]

[0034] The specific preparation method of the GAP-based thermoplastic propellant is:

[0035] Put the GAP-ETPE adhesive and plasticizer (A3 and A6) into the container, heat up to 70±2°C to melt, use a high-speed mixer to mix it evenly, add metal fuel (Al) and functional additives (N , N-diphenyl-p-phenylenediamine, ottoxin, tetraethylenepentamineacrylonitrile glycidol and methyl stearate), premix them, and then convey the premixed materials to the double In the screw, add a certain amount of oxidant (AP) to the twin-screw mixing equipment through the powder feeder for mixing. The mixing temperature is 80°C to 85°C. Extrude into strips at the end of the twin-screw mixing equipment, and then use granulation It is made into uniform-sized granules, and the granules are transported into the next-stage twin-screw mixing ex...

Embodiment 2

[0037] The specific formulation and performance of the GAP-based thermoplastic propellant are shown in Table 2 below. Concrete preparation method is with embodiment 1.

[0038] Table 2

[0039]

[0040]

Embodiment 3

[0042] The specific formulation and performance of the GAP-based thermoplastic propellant are shown in Table 3 below. Concrete preparation method is with embodiment 1.

[0043] table 3

[0044]

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Abstract

The invention discloses a GAP-based thermoplastic propellant and a preparation method thereof. The propellant comprises the following components by weight: 7.5%-15% of a GAP-ETPE thermoplastic adhesive, 10%-25% of a plasticizer, 50%-65% of an oxidizing agent, 5%-18% of metal fuel, and 1%-5% of a functional additive. According to the invention, a GAP-ETPE material containing GAP dihydric alcohol and low molecular weight polyester dihydric alcohol as double soft segments is used as an adhesive of the propellant, a preparation process of twin-screw mixing granulation and twin-screw mixing pouringis adopted, the forming temperature is lower than or equal to 85 DEG C, physical cross-linking molding of the propellant is realized by adjusting the temperature, the limitation of time and space onthe traditional thermosetting propellant preparation process is broken through, the unique recoverable, reusable and repeated processing characteristics make the flexible production possible, the preparation period is shortened, the production and development cost is reduced, and the method has a good application prospect in the field of carrier rocket rapid manufacturing and the field of low-costproduction.

Description

technical field [0001] The invention relates to the technical field of solid propellants, in particular to a GAP-based thermoplastic propellant and a preparation method thereof. Background technique [0002] Composite solid propellants are mainly composed of liquid binders, solid oxidizers, metal fuels, functional additives and curing agents. At this stage, vertical mixers are mainly used to mix them, and the finished solid propellants are obtained through long-term heat preservation. The main disadvantages of its manufacturing process are: (1) The solid propellant is formed by chemical cross-linking, and the propellant performance is easily affected by the environment; (2) There are problems such as the manufacturing mode is limited by the space size, and the expired grain is difficult to recycle; (3) The production process is complicated, the heat preservation and curing cycle is longer, and the production cost is higher. [0003] Thermoplastic propellants can break the t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C06B45/10C06B33/06C06B33/12C06B23/00C06D5/06
CPCC06B33/06C06B45/10C06D5/06C06B23/00C06B33/12
Inventor 张习龙刘超牛草坪刘苗娥张明权王晓东朱自强胡晓亮喻尧张华燕
Owner HUBEI SANJIANG AEROSPACE JIANGHE CHEM TECH
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