Tri-functionality NIMMO-THF (3-nitatomcthyl-3-methyl oxetane-tetrahydrofuran) copolymer ether energetic binder and synthetic method thereof

A technology with three functionalities and synthetic methods, applied in the direction of polyurea/polyurethane adhesives, adhesive types, adhesives, etc., can solve problems such as not easy to stir evenly, high viscosity of the system, etc.

Inactive Publication Date: 2018-12-11
XIAN MODERN CHEM RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the synthesized bifunctional NIMMO-THF copolyether needs to be cured with hexamethylene isocyanate (HDI) and a crosslinking agent must be

Method used

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  • Tri-functionality NIMMO-THF (3-nitatomcthyl-3-methyl oxetane-tetrahydrofuran) copolymer ether energetic binder and synthetic method thereof
  • Tri-functionality NIMMO-THF (3-nitatomcthyl-3-methyl oxetane-tetrahydrofuran) copolymer ether energetic binder and synthetic method thereof
  • Tri-functionality NIMMO-THF (3-nitatomcthyl-3-methyl oxetane-tetrahydrofuran) copolymer ether energetic binder and synthetic method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Add 0.65g trimethylolpropane, 5.4g tetrahydrofuran, 2.1g boron trifluoride etherate complex in a 100mL four-necked round bottom flask equipped with mechanical stirring, reflux condenser, thermometer and dropping funnel, Stir for 30min, slowly add 11g of NIMMO monomer dropwise at room temperature, the dropwise addition time is 2h, and stir at room temperature for 24h after dropping. Add 50 mL of dichloromethane to dissolve, stop the reaction with saturated aqueous sodium carbonate solution, and wash with pure water three times. The organic phase was separated and the dichloromethane removed under reduced pressure to give 15.17 g of a viscous liquid.

[0022] Structure Identification:

[0023] IR, ν max (cm -1 ): 3453(-OH), 2940(-CH 3 ), 2865 (-CH 2 -), 1111 (fatty ether C-O-C), 1632, 1280, 867 (-ONO 2 ).

[0024] 1 H NMR (CDCl 3 ,500MHz): δ4.39~4.41(-CH 2 ONO 2 ),3.25~3.42(-CH 2 -O-CH 2 -),1.58~1.62(-CH 2 -CH 2 -),0.96~1.00(-CH 3 );

[0025] 13 C NMR (C...

Embodiment 2

[0029] Add 1.3g of trimethylolpropane, 5.4g of tetrahydrofuran, and 2.1g of boron trifluoride etherate complex in a 100mL four-necked round-bottomed flask equipped with mechanical stirring, reflux condenser, thermometer, and dropping funnel. Stir for 30min, slowly add 11g of NIMMO monomer dropwise at room temperature, the dropwise addition time is 2h, and stir at room temperature for 12h after dropping. Add 50 mL of dichloromethane to dissolve, stop the reaction with saturated aqueous sodium carbonate solution, and wash with pure water three times. The organic phase was separated, and the dichloromethane was removed under reduced pressure to obtain 15.75 g of a viscous liquid, which was the trifunctional NIMMO-THF copolyether energetic binder.

Embodiment 3

[0031] Add 0.65g trimethylolpropane, 5.4g tetrahydrofuran, 2.1g boron trifluoride etherate complex in a 100mL four-necked round bottom flask equipped with mechanical stirring, reflux condenser, thermometer and dropping funnel, Stir for 30 minutes, slowly add 22 g of NIMMO monomer dropwise at room temperature, the dropwise addition time is 4 hours, and stir for 24 hours at room temperature after the drop is completed. Add 50 mL of dichloromethane to dissolve, stop the reaction with saturated aqueous sodium carbonate solution, and wash with pure water three times. The organic phase was separated, and the dichloromethane was removed under reduced pressure to obtain 25.10 g of a viscous liquid, which was the trifunctional NIMMO-THF copolyether energetic binder.

[0032] Application properties of trifunctionality NIMMO-THF copolyether energetic adhesive of the present invention

[0033] 1) Thermal stability of trifunctional NIMMO-THF copolyether energetic adhesives

[0034] The t...

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Abstract

The invention discloses a tri-functionality NIMMO-THF (3-nitatomcthyl-3-methyl oxetane-tetrahydrofuran) copolymer ether energetic binder and a synthetic method thereof. The structural formula of the tri-functionality NIMMO-THF (3-nitatomcthyl-3-methyl oxetane-tetrahydrofuran) copolymer ether energetic binder is as shown in figure (I) in the specification. The synthetic method comprises the following steps that trimethylolpropane (TMP) serves as an initiator, 3-nitatomcthyl-3-methyl oxetane (NIMMO) and tetrahydrofuran (THF) serves as a monomer, and cationic ring opening polymerization reactionis carried out so as to obtain the tri-functionality NIMMO-THF (3-nitatomcthyl-3-methyl oxetane-tetrahydrofuran) copolymer ether energetic binder. The binder can be directly cured by adopting dual-functionality isocyanate, and a cross-linking agent does not need to be added. The binder is mainly used for a composite solid propellant and a polymer-bonded explosive. The structural formula of the tri-functionality NIMMO-THF (3-nitatomcthyl-3-methyl oxetane-tetrahydrofuran) copolymer ether energetic binder is as shown in figure (I) in the specification, wherein m is equal to 5-20, n is equal to 5-20 and is an integer.

Description

technical field [0001] The invention relates to a trifunctional NIMMO-THF copolyether energetic adhesive, which belongs to the field of solid propellants and polymer bonded explosives. Background technique [0002] The two-functionality NIMMO-THF copolyether is 3-nitrate methyl-3-methyloxetane (NIMMO) and Tetrahydrofuran (THF) obtained by polymerization. The polymerization provides protons to the NIMMO monomer through the initiator boron trifluoride ether complex, and then the protonated NIMMO monomer reacts with other monomers to achieve chain growth, and finally the long chain of the polymer undergoes a chain termination reaction with water to form Hydroxyl-terminated NIMMO-THF copolyether. Because 1,4-butanediol is used as co-initiator, the prepared NIMMO-THF copolyether has only two functionalities. [0003] Currently, the synthesized bifunctional NIMMO-THF copolyether is cured with hexamethylene isocyanate (HDI) and a crosslinking agent needs to be added at the same ...

Claims

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Application Information

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IPC IPC(8): C08G65/28C09J175/08C08G18/50
CPCC08G18/5021C08G65/2618C08G2650/50C09J175/08
Inventor 王晓川莫洪昌卢先明舒远杰刘宁徐明辉张倩汪伟
Owner XIAN MODERN CHEM RES INST
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