Method for improving mechanical performance of HTPB (hydroxyl-terminated polybutadiene) propellant and prepared HTPB propellant

A technology of butyl hydroxy propellant and propellant, which is applied in the field of rocket propulsion and missile weapons, to achieve good compatibility, improve aging performance, improve process performance and aging performance

Active Publication Date: 2018-04-03
HUBEI INST OF AEROSPACE CHEMOTECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the application of anionic butylated hydroxyl gum in butylated hydroxyl propellants is rarely reported at home and abroad.

Method used

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  • Method for improving mechanical performance of HTPB (hydroxyl-terminated polybutadiene) propellant and prepared HTPB propellant
  • Method for improving mechanical performance of HTPB (hydroxyl-terminated polybutadiene) propellant and prepared HTPB propellant
  • Method for improving mechanical performance of HTPB (hydroxyl-terminated polybutadiene) propellant and prepared HTPB propellant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The anionic butylated hydroxyl gum with the same relative molecular mass was substituted for different amounts of free radical butylated hydroxyl gum. The specific composition of the propellant formula is shown in Table 1.

[0035] Table 1 Propellant formulation composition

[0036]

[0037] Note: The relative molecular mass of the anionic glue in the formulations of 2#, 3#, 4#, and 5# is 5.68×10 3

[0038] The various performance results of table 2 propellant

[0039]

[0040] It can be seen from Table 2 that the mechanical properties of the propellant added with anionic butylated hydroxy rubber and curing catalyst are significantly better than those of the propellant formulation without anionic butylated hydroxy rubber, and the anionic butylated hydroxy rubber has no effect on the burning rate of the propellant. At the same time, it has good aging performance.

Embodiment 2

[0042] Anionic butylated hydroxyl gums with different relative molecular weights were selected to replace free radical butylated hydroxyl gums. The relative molecular masses of anions are shown in Table 3.

[0043] The relative molecular mass of table 3 anionic butylated hydroxyl gum

[0044] Numbering

AHTPB-1

AHTPB-2

AHTPB-3

relative molecular mass

2.66×10 3

5.68×10 3

6.49×10 3

[0045] The specific composition of the propellant formula is shown in Table 4.

[0046] Table 4 Propellant formulation composition

[0047]

[0048] Table 5 The results of the mechanical properties of the propellant

[0049]

[0050] It can be seen from Table 5 that the normal, high and low temperature mechanical properties of propellants added with different molecular weights of anionic butylated hydroxy rubber and curing catalysts are better than those of propellants without anionic butylated hydroxy rubber.

Embodiment 3

[0052] The anionic butylated hydroxyl gum with the same relative molecular mass was substituted for different amounts of free radical butylated hydroxyl gum, and the specific composition of the propellant formula is shown in Table 6.

[0053] Table 6 Propellant formulation composition

[0054]

[0055] Note: The relative molecular mass of anionic glue in 2#, 3#, and 4# formulas is 6.49×10 3 .

[0056] Table 7 The results of the mechanical properties of the propellant

[0057]

[0058] Table 8 Process performance of propellant

[0059]

[0060] Note: The propellant is kept at 50°C for 5 hours

[0061] It can be seen from Table 7 that the normal, high and low temperature mechanical properties of the propellant added with anionic butyl rubber and curing catalyst are better than those of the propellant without anionic butylated hydroxy rubber; The viscosity of the propellant of the hydroxyl glue and the curing catalyst is significantly reduced, and the process performan...

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Abstract

The invention discloses a method for improving mechanical performance of an HTPB (hydroxyl-terminated polybutadiene) propellant and the prepared HTPB propellant. AHTPB (anionic HTPB) is added to the HTPB propellant to replace part of free-radical HTPB, and a curing catalyst is added, wherein the AHTPB refers to bifunctional HTPB synthesized with an anionic method. The propellant is prepared from components in percentage by mass as follows: 1.0%-10.0% of AHTPB, 1.0%-10.0% of HTPB, 0.5%-1.5% of a curing agent, 55.0%-85.0% of an oxidizing agent AP, 5.0%-20% of metal fuel Al powder, 1.0%-6% of a plasticizer, 0.01%-0.1% of the curing catalyst and the like. The mechanical performance of the propellant can be improved significantly, the processing properties and the aging performance of the propellant can be improved while other properties of the propellant are not affected, and the increasingly high requirements of all kinds of rockets and strategic and tactical missiles for the mechanical performance of the propellant can be met.

Description

technical field [0001] The invention relates to a method for improving the mechanical properties of butyl-hydroxyl propellant and the butyl-hydroxyl propellant prepared by the method, which belongs to the field of rocket propulsion and missile weapons. , Strategic and tactical missiles have higher and higher requirements on the mechanical properties of propellants. Background technique [0002] Hydroxyl-terminated polybutadiene (referred to as free radical butadiene, HTPB) synthesized by free radical polymerization method as binder has the advantages of moderate price, simple curing system, and excellent comprehensive performance. The mainstream variety of composite solid propellants. However, with the development of weapon systems and aerospace technology, higher and higher requirements are put forward for the mechanical properties of butyl-hydroxyl propellants. It is difficult for the existing butyl-hydroxyl propellants that only use free-radical butyl-hydroxyl rubber as ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C06B23/00C06B29/22C06D5/06
CPCC06B23/009C06B29/22C06D5/06
Inventor 李爽贾方娜胡期伟刘长宝刘学高扬程迪
Owner HUBEI INST OF AEROSPACE CHEMOTECHNOLOGY
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