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Triblock energetic nitrate adhesive and synthesis method thereof

A synthesis method and nitrate technology, applied in the field of solid propellants, can solve problems such as affecting the energy of propellant formula, and achieve the effect of increasing miscibility

Inactive Publication Date: 2018-04-03
XIAN MODERN CHEM RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although the introduction of ester groups into the molecular structure of HTBCP improves the miscibility with nitrate plasticizers, it affects the energy of the propellant formulation because it is an inert binder

Method used

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  • Triblock energetic nitrate adhesive and synthesis method thereof
  • Triblock energetic nitrate adhesive and synthesis method thereof
  • Triblock energetic nitrate adhesive and synthesis method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] In a 150mL four-necked round bottom flask equipped with mechanical stirring, reflux condenser, thermometer and dropping funnel, 10g (1.7mmol) HTPB and 20mL dichloromethane were added successively, and 0.5mL boron trifluoride·ether was added after stirring to dissolve. The complex is reacted for 30 minutes at room temperature. Add 5.72g (40mmol) 3-nitrate methyl-3-methyloxetane (NIMMO) dropwise, the dropping time is 4h, the reaction temperature is controlled at 5~10℃, after dropping, polymerize at room temperature for 12h, use The saturated sodium carbonate aqueous solution was used to terminate the reaction, and the reaction solution was poured into 50 mL of water in a stirring state, and the lower organic phase was separated and washed three times with 50 mL of water. Separate the oil phase, add anhydrous magnesium sulfate to dry, stand for filtration, and remove dichloromethane and other volatile substances under reduced pressure to obtain 15.05 g of viscous liquid.

[...

Embodiment 2

[0034] Into a 150mL four-necked round bottom flask equipped with mechanical stirring, reflux condenser, thermometer and dropping funnel, 10g (1.7mmol) HTPB and 20mL dichloromethane were sequentially added, and after stirring, 0.5mL boron trifluoride·ether was added. The complex is reacted for 30min at room temperature. 11.44g (80mmol) 3-nitrate methyl-3-methyloxetane (NMMO) was added dropwise, the dropping time was 8h, the reaction temperature was controlled at 5~10℃, and the polymerization was carried out at room temperature for 24h after dropping. The reaction was terminated by saturated sodium carbonate aqueous solution, the reaction solution was poured into 50 mL of water in a stirring state, and the lower organic phase was separated and washed three times with 50 mL of water. Separate the oil phase, add anhydrous magnesium sulfate to dry, stand for filtration, and remove dichloromethane and other volatile substances under reduced pressure to obtain 20.68 g of viscous liqui...

Embodiment 3

[0037] Into a 150mL four-necked round bottom flask equipped with mechanical stirring, reflux condenser, thermometer and dropping funnel, 10g (1.7mmol) HTPB and 20ml dichloromethane were sequentially added, and after stirring, 0.5mL boron trifluoride·ether was added. The complex is reacted for 30 minutes at room temperature. 22.87g (40mmol) 3-nitrate methyl-3-methyloxetane (NIMMO) was added dropwise, the dropping time was 8h, the reaction temperature was controlled at 5~10℃, and the polymerization was carried out at room temperature for 24h after dropping. The saturated sodium carbonate aqueous solution was used to terminate the reaction, and the reaction solution was poured into 50 mL of water in a stirring state, and the lower organic phase was separated and washed three times with 50 mL of water. Separate the oil phase, add anhydrous magnesium sulfate to dry, stand for filtration, and remove dichloromethane and other volatile substances under reduced pressure to obtain 32.66 ...

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Abstract

The invention discloses a triblock energetic nitrate adhesive and a synthesis method thereof. A structural formula of the triblock energetic nitrate adhesive is shown as a formula (I). The synthesis method of the triblock energetic nitrate adhesive comprises the following steps: taking hydroxyl-terminated polybutadiene as an initiator and 3-nitrate methyl-3-methyloxetane (NIMMO) as a monomer and carrying out cation ring-opening polymerization to obtain the triblock energetic nitrate adhesive. The synthesis method disclosed by the invention is simple; a nitrate group gives energy to the adhesive; meanwhile, the miscibility between the nitrate group and an energetic plasticizer can be increased. The triblock energetic nitrate adhesive is mainly used for a compound solid propellant. The formula (I) is shown in the description, wherein m is equal to 5 to 10 and an integer; n is equal to 20 to 60 and is an integer.

Description

Technical field [0001] The invention relates to a triblock energy-containing nitrate ester adhesive, which belongs to the field of solid propellants. Background technique [0002] Hydroxy-terminated polybutadiene (HTPB) has excellent physical and chemical properties, T g Low, moderate viscosity, high loading capacity and good manufacturability in explosive formulations. The polyurethane elastomer formed after crosslinking and curing can reduce the sensitivity of grains and maintain excellent mechanical properties. It is a widely used adhesive for composite propellants and cast PBX explosives. However, the inert adhesive has low polarity and can only be plasticized with low-polarity inert compounds such as dioctyl sebacate, and is immiscible with conventional nitrate plasticizers, thus limiting the overall formulation Further increase in energy. [0003] In view of the defects of HTPB itself, chemical modification was carried out to try to introduce ester groups, azide and other g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D171/02C08G65/28
CPCC09D171/02C08G65/2609
Inventor 王晓川莫洪昌舒远杰卢先明刘宁徐明辉张倩
Owner XIAN MODERN CHEM RES INST
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