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Combined functional additive for improving mechanical properties of solid propellant and solid propellant comprising the combined functional additive

A technology of solid propellants and functional additives, applied in the direction of aromatic nitration compositions, offensive equipment, non-explosive/non-thermic components, etc., can solve the chemical incompatibility of nitrate plasticizers and the difficulty of aniline additives application, did not find the interaction between aniline and nitrate, etc., to improve chemical compatibility, increase strength and modulus, and improve mechanical properties

Active Publication Date: 2019-04-30
HUBEI INST OF AEROSPACE CHEMOTECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because aniline additives show weak basicity, are chemically incompatible with nitrate plasticizers in high-energy propellants, and no suitable chemical inhibitors have been found to improve the interaction between aniline and nitrate esters, so aniline additives have been Difficult to apply in high energy propellants

Method used

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  • Combined functional additive for improving mechanical properties of solid propellant and solid propellant comprising the combined functional additive
  • Combined functional additive for improving mechanical properties of solid propellant and solid propellant comprising the combined functional additive
  • Combined functional additive for improving mechanical properties of solid propellant and solid propellant comprising the combined functional additive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Propellant composition (mass percentage content)

[0044]

[0045] Wherein the above-mentioned combined functional auxiliary agent BA-1 comprises:

[0046]

[0047] Table 1 shows the chemical stability test results of the high-energy propellant billet prepared by adding BA-1. It can be seen that, compared with the blank, the addition of aniline alone will deteriorate the chemical stability of the propellant, while the chemical stability of the propellant added with BA-1 is good, the anti-crack time at 90°C is greater than 20 days, and the spontaneous combustion time is greater than 90 days The thermal weight loss rate is less than 1.5%.

[0048] Table 1 Propellant chemical stability test results

[0049]

[0050]

Embodiment 2

[0052]The mechanical property test results of the propellant prepared in Example 1 are shown in Table 2. It can be seen from Table 2 that, compared with the blank, the mechanical properties of the propellant are improved when aniline is used alone, and the effect of BA-1 on the mechanical properties of the propellant is more obvious.

[0053] Table 2 Comparison of the effects of additives

[0054]

Embodiment 3

[0056] The effect of the addition amount of aniline combined functional additive BA-1 on the high-energy propellant, the results are shown in Table 3. It can be seen from Table 3 that when BA-1 is not added, the modulus of the propellant is low and the elongation is high, which cannot meet the needs; while BA-1 can significantly increase the strength and modulus of the high-energy propellant, and slightly reduce the elongation Rate.

[0057] Table 3 Effect of the dosage of aniline combined functional additive BA-1

[0058]

[0059] It can be seen from Table 3 that when the high-energy propellant contains 1% combined functional additive (BA), the overall performance of the propellant is better and can meet the requirements of use, and with the increase of BA content, the strength and modulus of the propellant increase , the elongation decreased slightly, but it met the requirements for use. Therefore, the total content of BA in the following examples is 1.0%.

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Abstract

The invention relates to a composition function agent for improving the mechanical property of a solid propellant, and the solid propellant comprising the composition function agent. The composition function agent is prepared from phenylamine and a stabilizer, wherein the percentage contents of the phenylamine and the stabilizer accounting for the total mass of the solid propellant are respectively 0.03 percent to 0.35 percent and 0.3 percent to 2 percent. By adopting the composition function agent prepared from the phenylamine and the stabilizer, an interface effect is improved, hydroxyl in the phenylamine can enter to a propellant network structure to adjust the network density of an adhesive, and meanwhile, a benzene ring in the phenylamine is of a rigid structure and can be beneficial to remarkably improving the strength and the modulus of the propellant when being used as a hard segment, so that the mechanical property of the high-energy solid propellant is improved; meanwhile, the high-efficient stabilizer is adopted, so that the suppression of the chemical compatibility of phenylamine composition function agent and nitric acid ester is improved, the decomposition of the nitric acid ester under a weak alkali condition is suppressed, and the function of further improving the mechanical property of the propellant is realized.

Description

technical field [0001] The invention relates to a functional additive for improving the mechanical properties of a high-energy solid propellant and a solid propellant containing the combined functional additive, belonging to the technical field of solid propellants. Background technique [0002] With the application and development of strategic and tactical weapons, the requirements for the mechanical properties of high-energy solid propellants are increasing day by day, and the elongation of high-energy solid propellants is required to be greater than 80%, and the modulus is higher than 1.8Mpa. High-energy solid propellants use large doses of nitrate ester plasticizers and high-molecular-weight polyethers as binders, so that the network structure of the propellant is not perfect, and the modulus of the propellant formula is low, generally about 1Ma, and the propulsion After the modulus of the agent formulation increases, the elongation decreases, and the two are contradicto...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C06B23/00C06B25/06
CPCC06B23/009C06B25/06
Inventor 王小英汪越尹欣梅潘新洲李秀娟李伟张林唐泉胡冬芳罗国芳
Owner HUBEI INST OF AEROSPACE CHEMOTECHNOLOGY
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