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A kind of solid propellant with nitrated hydroxyl-terminated polybutadiene as binder

A technology for nitrating hydroxyl-terminated polybutadiene and solid propellant, which is used in explosives and other directions, can solve the problems of unsatisfactory mechanical properties of propellants, insufficient optimization of NHTPB structure and formula composition, etc., and achieves good process performance and mechanical performance, The effect of improving mechanical properties and improving compatibility

Active Publication Date: 2021-07-20
HUBEI INST OF AEROSPACE CHEMOTECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The propellant formulations using NHTPB as the binder reported in the literature, due to the insufficient optimization of the NHTPB structure and formulation composition, the mechanical properties of the propellant cannot meet the needs of practical applications

Method used

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  • A kind of solid propellant with nitrated hydroxyl-terminated polybutadiene as binder
  • A kind of solid propellant with nitrated hydroxyl-terminated polybutadiene as binder
  • A kind of solid propellant with nitrated hydroxyl-terminated polybutadiene as binder

Examples

Experimental program
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Effect test

Embodiment 1

[0028] A kind of solid propellant with nitrated hydroxyl-terminated polybutadiene as binder, it uses nitrated hydroxyl-terminated polybutadiene as binder, the molecular weight of nitrated hydroxyl-terminated polybutadiene is 3988, and the hydroxyl value is 0.45mmol / g , the mass fraction of nitrate ester groups is 5.4%, and the polyester-butylene hydroxyl block polymer is used as a network regulator, and its structure is as follows:

[0029]

[0030] For comparison, two formulations containing the above-mentioned binder are provided, the formulation containing the above-mentioned binder and the network regulator is designated as formulation 2, and the formulation that only contains the above-mentioned binder but does not contain the above-mentioned network regulator is designated as the formulation 1, two kinds of propellant formulations (each component is by mass percentage) as shown in Table 1:

[0031] Table 1 Propellant formula with nitrated hydroxyl-terminated polybutad...

Embodiment 2

[0040] A kind of solid propellant with nitrated hydroxyl-terminated polybutadiene as binder, with nitrated hydroxyl-terminated polybutadiene as binder, the molecular weight of nitrated hydroxyl-terminated polybutadiene is 3988, and the hydroxyl value is 0.48mmol / g, The mass fraction of nitrate ester groups is 7.03%; the polyester-butylene hydroxyl block polymer is used as a network regulator, and the polyester-butylene hydroxyl block polymer structure is as follows:

[0041]

[0042] This propellant formula (each component is by mass percent, marked as formula 3) is as shown in table 3:

[0043] Table 3 Propellant formula with nitrated hydroxyl-terminated polybutadiene as binder

[0044]

[0045] The solid content in formula 3 is 87%, with nitrated hydroxyl-terminated polybutadiene as binder, polyester-butylene hydroxyl block polymer network regulator, and adding nitro-containing energetic plasticizer bis 2,2-dinitrododecanol formal, to improve the energy performance of t...

Embodiment 3

[0050] A kind of solid propellant with nitrated hydroxyl-terminated polybutadiene as binder, with nitrated hydroxyl-terminated polybutadiene as binder, the molecular weight of nitrated hydroxyl-terminated polybutadiene is 4100, and the hydroxyl value is 0.46mmol / g, The mass fraction of nitrate ester groups is 6.35%; the polyester-butylene hydroxyl block polymer is used as a network regulator, and its structure is as follows:

[0051]

[0052] For comparison, two different formulations including the above adhesive and network regulator are provided, formulation 4 and formulation 5, the solid content of formulation 4 and formulation 5 are both 86.5%, the difference between the two is only the amount of network regulator There are differences, two propellant formulations (each component is by mass percentage) as shown in table 5:

[0053] Table 5 is the propellant formulation of binder with nitrated hydroxyl-terminated polybutadiene

[0054]

[0055] The mechanical propert...

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Abstract

The invention provides a solid propellant with nitrated hydroxyl-terminated polybutadiene as a binder, which also includes network regulator, curing agent TDI, ammonium perchlorate AP, aluminum powder Al, plasticizer and anti-aging agent , wherein the number-average molecular weight of nitrated hydroxyl-terminated polybutadiene is 3600-5100, the hydroxyl value is 0.42mmol / g-0.55mmol / g, the mass fraction of nitrate ester groups is 5%-9%, and the network regulator has a specified structure Polyester-butylene hydroxyl block polymer, the solid propellant mechanical properties of the present invention are significantly improved, wherein the application of nitrated hydroxyl-terminated polybutadiene improves the compatibility of the binder and the energetic plasticizer, It can improve the oxygen coefficient and energy performance of the propellant.

Description

technical field [0001] The invention generally belongs to the technical field of rocket propellants, and in particular relates to a solid propellant for charge of a solid rocket motor. Background technique [0002] Hydroxybutylene propellant has become the most widely used variety in solid rocket motors at home and abroad because of its excellent comprehensive performance and moderate price, and is in the mainstream of missile weapons. However, since the HTPB binder itself is an energy-free substance and is incompatible with nitrate plasticizers, the improvement of the energy performance of the propellant is restricted. [0003] In order to improve the energy performance of HTPB propellant, the HTPB propellant can be modified to increase the polarity of the HTPB, improve its compatibility with polar energetic plasticizers, and improve the energy performance of the propellant. It is a better solution to carry out nitration modification on HTPB binder to prepare nitrated hydr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C06B45/10C06B33/08C06B33/10
CPCC06B33/08C06B33/10C06B45/10
Inventor 胡期伟李爽石玉婷侯斌程迪孟嘉鑫
Owner HUBEI INST OF AEROSPACE CHEMOTECHNOLOGY
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