A kind of trifunctional end alkenyl copolyether energetic adhesive and its synthesis method

A technology of terminal alkenyl copolyether and trifunctionality, applied in the direction of polyether adhesive, adhesive type, adhesive, etc., which can solve the problem of lack of energy in elastomers

A technology of terminal alkenyl copolyether and trifunctionality, applied in the direction of polyether adhesive, adhesive type, adhesive, etc., which can solve the problem of lack of energy in elastomers

CN108949081BActive Publication Date: 2020-09-25XIAN MODERN CHEM RES INST
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  • A kind of trifunctional end alkenyl copolyether energetic adhesive and its synthesis method
  • A kind of trifunctional end alkenyl copolyether energetic adhesive and its synthesis method
  • A kind of trifunctional end alkenyl copolyether energetic adhesive and its synthesis method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Add 16.87g (5mmol) trifunctional NIMMO-THF copolyether in a four-neck round bottom flask equipped with mechanical stirring, reflux condenser, thermometer, and dropping funnel, and at a temperature of 50°C, add 1.25g ( 15mmol) of 3-propene isocyanate, the time of dropping was 10min, after the dropwise addition was completed, the temperature was raised to 77°C to continue the reaction for 12h, and the unreacted 3-propene isocyanate was removed under reduced pressure to obtain 18.12g of light yellow viscous liquid.

[0022] Structure Identification:

[0023] IR, ν max (cm -1 ): 3443 (-NH), 1727 (-C=O), 1518 (amide II peak C-N-H), 1112 (fatty ether C-O-C), 1632, 1281, 869 (-ONO 2 ).

[0024] 1 H NMR (CDCl 3 ,500MHz): δ5.70~5.80(=CH-),5.20~5.30(=CH 2 ),4.39~4.41(-CH 2 ONO 2 ),4.01(-CH 2 -NH-),3.80(-O-CH 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 (CDCl 3 ,125MHz): δ155.9, 134.3, 116.3, 75.1, 73.7, 70.6, 43.5...

Embodiment 2

[0028] Add 16.87g (5mmol) trifunctional NIMMO-THF copolyether in a four-necked round bottom flask equipped with mechanical stirring, reflux condenser, thermometer, and dropping funnel, and at a temperature of 50°C, add 1.33g ( 16mmol) of 3-propene isocyanate, the time of dropping is 10min, after the dropwise addition is completed, the temperature is raised to 77°C to continue the reaction for 16h, and the unreacted 3-propene isocyanate is removed under reduced pressure to obtain 18.15g of light yellow viscous liquid, namely Trifunctional alkenyl-terminated copolyether energetic adhesive.

Embodiment 3

[0030] Add 16.87g (5mmol) trifunctional NIMMO-THF copolyether in a four-necked round bottom flask equipped with mechanical stirring, reflux condenser, thermometer, and dropping funnel, and at a temperature of 50°C, add 1.41g ( 17mmol) of 3-propene isocyanate, the time of dropping is 10min, after the dropwise addition is completed, the temperature is raised to 77°C to continue the reaction for 18h, and the unreacted 3-propene isocyanate is removed under reduced pressure to obtain 18.21g of light yellow viscous liquid, namely Trifunctional alkenyl-terminated copolyether energetic adhesive.

[0031] Application properties of the trifunctional alkenyl-terminated copolyether energetic adhesive of the present invention

[0032] 1) Curing temperature

[0033] The trifunctional alkenyl-terminated copolyether energetic adhesive prepared by the present invention is cured with trimethylisophthalonitrile oxide, and the required curing temperature is compared with other curing systems as ...

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Abstract

The invention discloses a trifunctional end-alkenyl copolyether energetic binder and a synthesis method thereof. A structural formula of the trifunctional end-alkenyl copolyether energetic binder is shown as Figure (I), and a synthesis process thereof comprises the following steps: using trifunctional NIMMO-THF copolyether as a raw material, adding allyl isocyanate, and carrying out addition reaction to obtain the trifunctional end-alkenyl copolyether energetic binder. The synthesis method facilitates large-scale preparation, and double bonds endow the binder with the capability of curing at room temperature. The trifunctional end-alkenyl copolyether energetic binder and the synthesis method thereof disclosed by the invention are mainly used for composite solid propellants and polymer bonded explosives, (formula shown in the specification), where m=5-20, n=5-20, and m and n are integers.

Description

technical field [0001] The invention relates to a trifunctional terminal alkenyl copolyether energetic adhesive, which belongs to the field of solid propellants and polymer bonded explosives. Background technique [0002] At present, there are two types of energetic binders that have been studied more, one is azide-based energetic binders, and the other is nitrate-based energetic binders. Common azide energetic binders are polyazidoglycidyl ether (GAP), 3-azidomethyloxetane homopolymer (PAMMO) and 3,3-diazidomethyloxetane Cyclic homopolymer (PBAMO), etc. Commonly used nitrate ester energetic binders are polyglycidyl ether nitrate (PGN) and poly 3-nitrate methyl-3-methyloxetane (PNIMMO). The terminal groups of these energetic adhesives are all hydroxyl groups, and generally can only be cured with isocyanate. However, the isocyanate curing system has the problems of high curing temperature and sensitivity to moisture. [0003] In order to solve the problem of high curing t...

Claims

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Application Information

Patent Timeline
25 Sep 2020
Publication
CN108949081B
IPC
C09J171/00; C08G65/333
CPC
C08G65/33351; C09J171/00
Inventors
王晓川; 卢先明