3-azido methyl-3-methyloxetane-tetrahydrofuran energetic copolyether with alternating multi-block structure and synthesis method thereof

A methyl oxetane and azidomethyl technology, which is applied in the field of 3-azidomethyl-3-methyl oxetane-tetrahydrofuran copolymer and its synthesis, can solve the problem of carrying atoms in the main chain Low temperature, poor mechanical properties and process performance at low temperature, etc., to achieve the effect of controllable mechanical properties

Active Publication Date: 2021-10-15
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are relatively large side group azido groups in the PAMMO molecular chain, the number of carrying atoms in the main chain is low, and the force between the molecular chains is strong, so that it has relatively low-temperature mechanical properties and process performance in solid propellant applications. bad question

Method used

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  • 3-azido methyl-3-methyloxetane-tetrahydrofuran energetic copolyether with alternating multi-block structure and synthesis method thereof
  • 3-azido methyl-3-methyloxetane-tetrahydrofuran energetic copolyether with alternating multi-block structure and synthesis method thereof
  • 3-azido methyl-3-methyloxetane-tetrahydrofuran energetic copolyether with alternating multi-block structure and synthesis method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Add 1.5g of PAMMO (Mn=216, 6.94mmol), 5mL of THF, and 2.0g of KOH (35.65mmol) into the round-bottomed flask in sequence, and raise the temperature of the system to 65°C under constant temperature reflux. Then, 2.0 g (3.80 mmol) of tosylate-terminated polytetrahydrofuran and 5 mL of THF solution were slowly dropped into the above-mentioned reflux system, and the system continued to react at 65° C. for 72 h after the addition was completed. After the reaction was completed, THF was filtered and rotary evaporated, and the crude product was dissolved in dichloromethane, washed with saturated brine until neutral, then dried by adding anhydrous sodium sulfate, suction filtered, and rotary evaporated. Finally, petroleum ether with a boiling point of 60-90° C. and methanol were added in sequence to wash and rotary evaporate to obtain a yellow viscous liquid (1.02 g).

[0029] Structure Identification:

[0030] FT-IR infrared: After PTHF undergoes p-tosylation to obtain termina...

Embodiment 2

[0034] Add 1.0g PAMMO (Mn=225, 4.44mmol), 5mL THF, and 2.0g KOH (35.65mmol) into the round-bottomed flask in turn, and raise the temperature of the system to 65°C under constant temperature reflux. Then, 1.0 g (2.50 mmol) of tosylate-terminated 1,4-butanediol and 5 mL of THF solution were slowly dropped into the above-mentioned reflux system, and the system continued to react at 65° C. for 48 h after the addition was completed. After the reaction was completed, THF was filtered and rotary evaporated, and the crude product was dissolved in dichloromethane, washed with saturated brine until neutral, then dried by adding anhydrous sodium sulfate, suction filtered, and rotary evaporated. Finally, petroleum ether with a boiling point of 60-90° C. and methanol were added successively to wash and rotary evaporate to obtain a yellow viscous liquid (0.41 g).

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Abstract

The invention discloses 3-azidomethyl-3-methyloxetane-tetrahydrofuran energetic copolyether with an alternating multi-block structure and a synthesis method thereof. The structural formula of the alternating multi-block energetic adhesive is shown as (I) in the specification, wherein m is equal to 1-5, n is equal to 1-4, k is equal to 1-10, and m, n and k are integers. The synthesis process comprises the following step of: by taking polytetrahydrofuran (PTHF) and a 3-azidomethyl-3-methyloxetane homopolymer (PAMMO) as raw materials and KOH as a catalyst, carrying out a Williamson ether synthesis method to obtain the alternate multi-block azido energetic adhesive. The synthesis method is simple, and the alternating multi-block AMMO-THF energetic adhesive has an adjustable microscopic sequence structure and can endow a material with relatively good mechanical properties and processability.

Description

technical field [0001] The invention relates to an alternating multi-block 3-azidomethyl-3-methyloxetane-tetrahydrofuran copolymer and a synthesis method thereof. The compound can be used as an energetic binder of a solid propellant and belongs to Polymer material technology field. Background technique [0002] Azide binder has the advantages of high energy, high density, positive heat of formation, good thermal stability, low characteristic signal, low combustion temperature, low sensitivity, and low molecular weight of combustion products. Amyl oxetane homopolymer (AMMO) is one of the typical representatives. However, there are relatively large side group azide groups in the PAMMO molecular chain, the number of carrying atoms in the main chain is low, and the force between the molecular chains is strong, so that it has relatively low-temperature mechanical properties and process performance in solid propellant applications. bad question. [0003] Generally, the method o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G81/00C06D5/00C06B45/10
CPCC08G81/00C06D5/00C06B45/105
Inventor 郑文芳李文希李雅楠潘仁明蔺向阳
Owner NANJING UNIV OF SCI & TECH
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