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A kind of preparation method of terminal triazolyl azide polyether

A technology of hydroxyl-terminated azide polyether and triazole-terminated polyether, which is applied in the field of preparation of triazolyl-terminated azide polyether, can solve potential safety hazards, environmental pollution, and difficulty in dissociation of covalently bonded three-dimensional crosslinked polymers, etc. problem, to achieve the effect of efficient recycling

Active Publication Date: 2020-08-11
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Due to the stable and difficult dissociation of the covalently bonded three-dimensional cross-linked polymer network structure, it is extremely difficult to dispose of waste solid composite propellants
At present, the commonly used open-air incineration method, high-pressure water cutting method, liquid nitrogen cutting method and various extraction methods to deal with waste composite solid propellants cause serious environmental pollution, safety hazards and high costs.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0039] The preparation method of terminal triazolyl polyazide glycidyl ether is:

[0040] 1) Put 25 g of hydroxyl-terminated polyazide glycidyl ether and 20 mL of anhydrous tetrahydrofuran solvent into a 250 mL three-necked flask equipped with a mechanical stirring and condensation tube device;

[0041] 2) At room temperature, add 3.26g of TDI into the container of step 1), stir evenly, raise the temperature to 65°C and react for 6 hours, then cool down to room temperature;

[0042] 3) Add 7.08g of 1-benzyl-4-hydroxymethyltriazole to the container in step 2), stir evenly and then heat up to 65°C for 6 hours;

[0043] 4) Removing the tetrahydrofuran solvent in step 3) by rotary evaporation to obtain the crude product of triazolyl-terminated polyazide glycidyl ether;

[0044] 5) Dissolve the crude terminal triazole-based polyazide glycidyl ether obtained in step 4) in 20 mL of DMF solvent, add 20 mL of distilled water to oscillate, stand for layering, take the oil phase and dis...

Embodiment 1

[0056] Put 20g of terminal triazole-based polyazide glycidyl ether prepolymer into a dry beaker, ensure that the molar number of triazole groups is equivalent to the molar number of bromine atoms, and add 0.997g of corresponding tribromoneopentyl alcohol curing agent, Stir well. Then it was vacuum cast into a tetrafluoroethylene mold and cured at 90° C. for 6 days to obtain a triazolium ion-crosslinked polyazide glycidyl ether elastomer. The mechanical tensile strength of the elastic body at 20° C. is 1.35 MPa, and the elongation is 120%.

[0057] After soaking 1 g of the obtained elastomer in 5 g of 1-bromopentane solvent, the elastomer was completely dissolved after 5 days and became liquid.

Embodiment 2

[0059] Put 20g of triazole-terminated polyazideglycidyl ether prepolymer into a dry beaker to ensure that the molar number of triazole groups is equivalent to the molar number of bromine atoms, 0.281g of 1,6-dibromohexane, three Bromoneopentyl alcohol 0.748g is mixed with curing agent and stirred evenly. Then it was vacuum cast into a tetrafluoroethylene mold and cured at 90° C. for 6 days to obtain a triazolium ion-crosslinked polyazide glycidyl ether elastomer. The mechanical tensile strength of the elastic body at 20° C. is 1.09 MPa, and the elongation is 145%.

[0060] After soaking 1 g of the elastomer in 5 g of 1-bromooctane solvent, the elastomer was completely dissolved after 5 days and became liquid.

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Abstract

The invention relates to a preparation method of terminal triazolyl azido polyether, and belongs to the technical field of composite solid propellants. A terminal triazolyl prepolymer and halides carry out reactions to generate a polymer elastic material with three-dimensionally crosslinked triazolium groups. The elastomer has a stable chemical crosslinking network. Different from conventional covalent bond crosslinked polymeric elastomers, triazolium group crosslinked polymeric elastomer can carry out ion exchange reactions with mono-halogenated compounds, and the three dimensional crosslinked network is dissociated. The elastomer can be used to prepare a solid composite propellant, the polymer crosslinked network dissociation can be realized, the solid elastomer is converted into liquidelastomer, and the waste and oil solid composite propellant is efficiently recovered and utilized.

Description

technical field [0001] The invention relates to a preparation method of a terminal triazolyl azide polyether, belonging to the technical field of composite solid propellants. Background technique [0002] As the power source of solid rocket motor, composite solid propellant not only needs to meet the energy demand of solid rocket motor; at the same time, as an engineering component, composite solid propellant also needs to have certain mechanical properties in a wide temperature range to meet the requirements of different working environments . Composite solid propellant is a composite material with polymer cross-linked network elastomer as the continuous phase and solid filler as the dispersed phase, in which the polymer continuous phase is the matrix that carries the mechanical properties of the composite solid propellant; the mechanical properties are stable, good polymerization Bioelastomers are the prerequisite for the preparation of high-performance composite solid pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/76C08G18/50C08G18/28C08J3/24C08J3/09C08L75/08C08K5/06C08K5/02
CPCC08G18/285C08G18/5021C08G18/7614C08J3/093C08J3/24C08J2375/08C08K5/02C08K5/06
Inventor 翟进贤郭晓燕
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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