CN117069949A - Glycidyl azide polyether-tetrahydrofuran energetic copolyether with alternating multiblock structure and synthesis method thereof - Google Patents
Glycidyl azide polyether-tetrahydrofuran energetic copolyether with alternating multiblock structure and synthesis method thereof Download PDFInfo
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- WYURNTSHIVDZCO-UHFFFAOYSA-N tetrahydrofuran Substances C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 title claims abstract description 62
- JSOGDEOQBIUNTR-UHFFFAOYSA-N 2-(azidomethyl)oxirane Chemical compound [N-]=[N+]=NCC1CO1 JSOGDEOQBIUNTR-UHFFFAOYSA-N 0.000 title claims abstract description 31
- 238000001308 synthesis method Methods 0.000 title claims abstract description 13
- 239000004721 Polyphenylene oxide Substances 0.000 claims abstract description 19
- 229920000570 polyether Polymers 0.000 claims abstract description 19
- 229920000909 polytetrahydrofuran Polymers 0.000 claims abstract description 16
- 239000003054 catalyst Substances 0.000 claims abstract description 6
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical group [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 24
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 claims description 15
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 15
- 238000006243 chemical reaction Methods 0.000 claims description 14
- JOXIMZWYDAKGHI-UHFFFAOYSA-N toluene-4-sulfonic acid Chemical compound CC1=CC=C(S(O)(=O)=O)C=C1 JOXIMZWYDAKGHI-UHFFFAOYSA-N 0.000 claims description 14
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 12
- 238000010992 reflux Methods 0.000 claims description 11
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 claims description 9
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 8
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims description 8
- 238000001035 drying Methods 0.000 claims description 8
- 239000011591 potassium Substances 0.000 claims description 8
- 229910052700 potassium Inorganic materials 0.000 claims description 8
- 239000011734 sodium Substances 0.000 claims description 8
- 229910052708 sodium Inorganic materials 0.000 claims description 8
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 6
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 6
- 239000007864 aqueous solution Substances 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 6
- 239000000243 solution Substances 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 6
- 125000003158 alcohol group Chemical group 0.000 claims description 5
- 239000003208 petroleum Substances 0.000 claims description 5
- 238000002390 rotary evaporation Methods 0.000 claims description 5
- WQDUMFSSJAZKTM-UHFFFAOYSA-N Sodium methoxide Chemical compound [Na+].[O-]C WQDUMFSSJAZKTM-UHFFFAOYSA-N 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 4
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims description 3
- 239000011230 binding agent Substances 0.000 claims description 3
- 238000003760 magnetic stirring Methods 0.000 claims description 3
- 230000007935 neutral effect Effects 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 229920006395 saturated elastomer Polymers 0.000 claims description 3
- 239000011780 sodium chloride Substances 0.000 claims description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 2
- KEAYESYHFKHZAL-UHFFFAOYSA-N Sodium Chemical compound [Na] KEAYESYHFKHZAL-UHFFFAOYSA-N 0.000 claims description 2
- -1 cyclic ether compounds Chemical class 0.000 claims description 2
- 239000012312 sodium hydride Substances 0.000 claims description 2
- 229910000104 sodium hydride Inorganic materials 0.000 claims description 2
- 150000004703 alkoxides Chemical group 0.000 claims 1
- 238000001704 evaporation Methods 0.000 claims 1
- 239000000463 material Substances 0.000 claims 1
- 239000000853 adhesive Substances 0.000 abstract description 6
- 230000001070 adhesive effect Effects 0.000 abstract description 6
- 239000003380 propellant Substances 0.000 abstract description 5
- 239000002994 raw material Substances 0.000 abstract description 4
- 150000001540 azides Chemical class 0.000 abstract description 3
- 229920001519 homopolymer Polymers 0.000 abstract description 3
- 238000010534 nucleophilic substitution reaction Methods 0.000 abstract description 3
- 229920001400 block copolymer Polymers 0.000 description 5
- 239000012043 crude product Substances 0.000 description 4
- 238000010025 steaming Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 3
- 125000000852 azido group Chemical group *N=[N+]=[N-] 0.000 description 3
- WERYXYBDKMZEQL-UHFFFAOYSA-N butane-1,4-diol Chemical compound OCCCCO WERYXYBDKMZEQL-UHFFFAOYSA-N 0.000 description 3
- 230000009477 glass transition Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- YYROPELSRYBVMQ-UHFFFAOYSA-N 4-toluenesulfonyl chloride Chemical compound CC1=CC=C(S(Cl)(=O)=O)C=C1 YYROPELSRYBVMQ-UHFFFAOYSA-N 0.000 description 2
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 description 2
- 238000009835 boiling Methods 0.000 description 2
- 238000007334 copolymerization reaction Methods 0.000 description 2
- 150000004292 cyclic ethers Chemical class 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000012153 distilled water Substances 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 2
- 239000002861 polymer material Substances 0.000 description 2
- 239000004449 solid propellant Substances 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000005160 1H NMR spectroscopy Methods 0.000 description 1
- FXBXOZPXPAXZKM-UHFFFAOYSA-N 2-(azidooxymethyl)oxirane Chemical compound C(C1CO1)ON=[N+]=[N-] FXBXOZPXPAXZKM-UHFFFAOYSA-N 0.000 description 1
- KZMGYPLQYOPHEL-UHFFFAOYSA-N Boron trifluoride etherate Chemical compound FB(F)F.CCOCC KZMGYPLQYOPHEL-UHFFFAOYSA-N 0.000 description 1
- BRLQWZUYTZBJKN-UHFFFAOYSA-N Epichlorohydrin Chemical compound ClCC1CO1 BRLQWZUYTZBJKN-UHFFFAOYSA-N 0.000 description 1
- 238000005033 Fourier transform infrared spectroscopy Methods 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010538 cationic polymerization reaction Methods 0.000 description 1
- 238000012656 cationic ring opening polymerization Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 230000008034 disappearance Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 238000000655 nuclear magnetic resonance spectrum Methods 0.000 description 1
- 230000005311 nuclear magnetism Effects 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000006068 polycondensation reaction Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000010189 synthetic method Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G81/00—Macromolecular compounds obtained by interreacting polymers in the absence of monomers, e.g. block polymers
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Polyethers (AREA)
Abstract
The application discloses a glycidyl azide polyether-tetrahydrofuran energetic copolyether with an alternating multiblock structure and a synthesis method thereof, which take Polytetrahydrofuran (PTHF) and glycidyl azide polyether homopolymer (GAP) as raw materials, KOH is taken as a catalyst, and an azide type energetic adhesive with alternating multiblock is obtained through nucleophilic substitution reaction, so that the obtained alternating multiblock GAP-THF energetic copolyether can endow propellant with better mechanical properties.
Description
Technical Field
The application belongs to the technical field of high polymer materials, and particularly relates to glycidyl azide polyether-tetrahydrofuran energetic copolyether with an alternating multi-block structure and a synthesis method thereof.
Background
The solid propellant as one kind of composite polymer material consists of oxidant, adhesive and other additives. The solid engine is a power source of a solid engine of a rocket, a missile and a space vehicle, and the constituent substances of the solid engine are subjected to chemical reaction in the engine to release energy, so that the engine generates certain thrust. Typical azide adhesives such as PBAMO, PAMMO, GAP and the like are widely researched by propellant researchers at home and abroad due to high energy content, accord with research trends of high energy, insensitive and low vulnerability of the propellant. The poly-azido glycidyl ether (GAP) is an energy-containing prepolymer with a side chain containing azido groups and a main chain of polyether structure. The prepolymer has a positive heat of formation and thus a high energy level. However, due to the poor mechanical properties and relatively high glass transition temperature of the azido glycidyl ether monomer, in order to obtain an energetic binder of a solid propellant, it is necessary to copolymerize it with other substances to improve the flexibility of the molecular chain and to increase the low temperature mechanical properties of the binder.
GAP has some defects in performance, such as higher glass transition temperature or poorer low-temperature mechanical property, so that it is considered to introduce THF chain links with better flexibility into the homopolyether or improve the performance by means of copolymerization modification with other polymers, etc., and attempts have been made in 2002 Kawamoto and 2006 Enoki respectively, and they have been made by using 1, 4-butanediol/boron trifluoride diethyl ether (BDO/BF) 3 ·Et 2 O) is an initiating system, 3-dibromo methyl oxetane and epichlorohydrin are used as raw materials to firstly undergo cationic ring-opening polymerization, then azide substitution is carried out to synthesize GAP-GAP copolymer, experiments show that GAP is well blocked into prepolymer, the mass fraction of GAP is about 35%, the average relative molecular weight is 1380, the glass transition temperature is-54.39 ℃, the viscosity of the synthesized prepolymer is lower, the mechanical property of the adhesive is well improved, but the GAP obtained by the synthetic method is of a random block structure, and the regular block copolyether performance is extremely highUncertainty, in order to be able to obtain a more accurate understanding of the correlation between the block length and the mechanical properties, it is necessary to synthesize a glycidyl azide polyether-tetrahydrofuran energetic copolyether with an alternating multiblock structure.
Disclosure of Invention
The application aims to: aiming at the problems and the defects existing in the prior art, the application aims to provide the glycidyl azide polyether-tetrahydrofuran energetic copolyether with an alternating multiblock structure and a synthesis method thereof.
The technical scheme is as follows: in order to achieve the above purpose, the present application adopts the following technical scheme:
polytetrahydrofuran (PTHF) and glycidyl azide polyether homopolymer (GAP) are used as raw materials, KOH is used as a catalyst, and nucleophilic substitution reaction is carried out to obtain an alternative multiblock azido energetic adhesive, and the obtained alternative multiblock GAP-THF energetic copolyether can endow the propellant with good mechanical properties, and has the following structural formula:
wherein m, n and 1 are integers, and the specific steps are as follows:
step 1, adding a small molecular weight glycidyl azide polyether oligomer, tetrahydrofuran and excessive potassium hydroxide into a three-neck flask provided with a magnetic stirring device, a thermometer and a reflux device, and carrying out reflux stirring reaction to obtain a potassium/sodium terminal alcohol glycidyl azide polyether oligomer;
step 2, dropwise adding tetrahydrofuran solution of p-toluenesulfonic acid esterified polytetrahydrofuran into the potassium/sodium terminal alcohol glycidyl azide polyether oligomer, carrying out reflux stirring reaction, and filtering after the reaction is finished to obtain yellow liquid;
step 3, removing tetrahydrofuran solvent in the yellow liquid by rotary evaporation, dissolving in dichloromethane, regulating the PH value to be neutral by using a hydrochloric acid aqueous solution and a sodium chloride saturated aqueous solution, drying by using anhydrous sodium sulfate, and drying by rotary evaporation; the cyclic ether and low molecular oligomers are then removed by extraction with petroleum ether and methanol to give GAP-THF energetic copolyethers with alternating multiblock structures.
Preferably, in step 1, the molecular weight of the glycidyl azide polyether oligomer is mn=0 to 2000.
Preferably, in step 1, the volume ratio of the glycidyl azide polyether oligomer to tetrahydrofuran is 1:1 to 3.
Preferably, in step 1, the catalyst may be potassium hydroxide, sodium hydride or sodium methoxide.
Preferably, in the step 2, the molar ratio of the sodium/potassium end alcohol glycidyl azide polyether to the p-toluenesulfonic acid polytetrahydrofuran is 1-2: 1.
preferably, in step 2, the volume ratio of the p-toluenesulfonic acid polytetrahydrofuran to tetrahydrofuran is 1:1 to 3.
Preferably, in the step 2, the reflux reaction time is 12-72 h.
The beneficial effects are that: the copolymerization method of cationic polymerization commonly used in the prior art is eliminated, the polycondensation between the oligomers is realized by a Wilson ether synthesis method, and the GAP-THF energy-containing copolyether with an alternative multiblock structure is successfully obtained.
Drawings
FIG. 1 is a schematic view of an alternative multi-block copolymer of GAP-THF prepared in accordance with the present application;
FIG. 2 is a Fourier infrared characteristic spectrum of a GAP-THF alternating multi-block copolymer in accordance with an embodiment of the present application;
FIG. 3 is a hydrogen nuclear magnetic resonance spectrum of an alternative multi-block copolymer of GAP-THF in accordance with an embodiment of the present application;
FIG. 4 is a gel chromatogram of an alternative multi-block copolymer of GAP-THF in accordance with an embodiment of the present application;
FIG. 5 is a gel chromatogram of an alternative multi-block copolymer of GAP-THF in example II of the present application.
Description of the embodiments
The present application is further illustrated in the accompanying drawings and detailed description which are to be understood as being merely illustrative of the application and not limiting of its scope, and various modifications of the application, which are equivalent to those skilled in the art upon reading the application, will fall within the scope of the application as defined in the appended claims.
Polytetrahydrofuran (PTHF) and glycidyl azide polyether homopolymer (GAP) are used as raw materials, KOH is used as a catalyst, and nucleophilic substitution reaction is carried out to obtain an alternative multiblock azido energetic adhesive, and the obtained alternative multiblock GAP-THF energetic copolyether can endow the propellant with good mechanical properties, and has the following structural formula:
wherein m, n and 1 are integers, and the specific steps are as follows:
step 1, adding a small molecular weight glycidyl azide polyether oligomer, tetrahydrofuran and excessive potassium hydroxide into a three-neck flask provided with a magnetic stirring device, a thermometer and a reflux device, and carrying out reflux stirring reaction to obtain a potassium/sodium terminal alcohol glycidyl azide polyether oligomer;
step 2, dropwise adding tetrahydrofuran solution of p-toluenesulfonic acid esterified polytetrahydrofuran into the potassium/sodium terminal alcohol glycidyl azide polyether oligomer, carrying out reflux stirring reaction, and filtering after the reaction is finished to obtain yellow liquid;
step 3, removing tetrahydrofuran solvent in the yellow liquid by rotary evaporation, dissolving in dichloromethane, regulating the PH value to be neutral by using a hydrochloric acid aqueous solution and a sodium chloride saturated aqueous solution, drying by using anhydrous sodium sulfate, and drying by rotary evaporation; the cyclic ether and low molecular oligomers are then removed by extraction with petroleum ether and methanol to give GAP-THF energetic copolyethers with alternating multiblock structures.
Example 1
2.89g GAP (Mn=550, 5.25 mmol) was dissolved in 10 mL THF, 2.67g KOH (66 mmol) was added and the system was transferred to a 65℃constant temperature oil bath. 1.12g of a solution of tosylate-terminated polytetrahydrofuran (Mn=396, 2.83 mmol) in THF was slowly added dropwise to the reaction system, and the reaction was continued at 65℃for 48 hours after the completion of the addition. The crude product was then filtered off and evaporated in vacuo, and the crude product was dissolved in dichloromethane and washed with distilled water to neutrality. Drying with anhydrous magnesium sulfate, suction filtering, rotary steaming, sequentially adding petroleum ether with boiling point of 60-90 ℃ and methanol, washing, rotary steaming to obtain yellow sticky substance (1.32 g).
And (3) structural identification:
FT-IR infrared: after PTHF-OTs are subjected to p-toluenesulfonylation to obtain end tosylate polytetrahydrofuran, the infrared hydroxyl group is 3000-3500cm -1 Disappearance, demonstrated that the terminal groups of polytetrahydrofuran have been completely modified. The hydroxyl peaks of GAP-THF prepared by GAP and PTHF-OTs are significantly reduced compared with GAP, and p-toluenesulfonyl chloride is 1000-1500cm -1 The characteristic peak of (2) disappears.
Nuclear magnetism: 1H-NMR (CDCl) 3 500 MHz): delta 3.3-3.4 (CH in THF) 2 -O），δ3.23-3.28（CH 2 -N 3 ) 3.18-3.23 (CH in GAP) 2 -O), 1.44-1.64 (C-CH in THF) 2 -C）。
The above data indicate that the synthesized compounds are GAP-THF energetic copolyethers of alternating multiblock structure.
Example two
2.01g GAP (Mn=497, 4.04 mmol) was dissolved in 20 mL THF, 2.32g KOH (58 mmol) was added, and the system was transferred to a constant temperature oil bath at 65 ℃. A solution of 1..01g of end tosylate glycerol (Mn=460, 2.2 mmol) in THF was slowly added dropwise to the reaction system, and after the addition, the system was allowed to continue to react at 65℃for 24 h. The crude product was then filtered off and evaporated in vacuo, and the crude product was dissolved in dichloromethane and washed with distilled water to neutrality. Drying with anhydrous magnesium sulfate, suction filtering, rotary steaming, sequentially adding petroleum ether with boiling point of 60-90 ℃ and methanol, washing, rotary steaming to obtain yellow sticky substance (1.5 g).
The foregoing is only a preferred embodiment of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art should be able to apply the equivalent replacement or modification to the technical solution and the technical concept according to the present application within the scope of the present application.
Claims (8)
1. A glycidyl azide polyether-tetrahydrofuran energetic copolyether having an alternating multiblock structure, characterized by: the alternating multi-block energetic binder material has the following structural formula:
wherein m, n and l are integers.
2. The glycidyl azide polyether-tetrahydrofuran energetic copolyether with an alternating multiblock structure and the synthesis method thereof are characterized by comprising the following steps:
step 1, adding a glycidyl azide polyether oligomer, tetrahydrofuran and a catalyst into a three-neck flask with a magnetic stirring device, a thermometer and a reflux device, and carrying out reflux stirring reaction to obtain a potassium/sodium terminal alcohol glycidyl azide polyether oligomer;
step 2, dropwise adding tetrahydrofuran solution containing p-toluenesulfonic acid polytetrahydrofuran (PEG-OTS) into the potassium/sodium terminal alkoxide glycidyl azide polyether oligomer, carrying out reflux stirring reaction, and filtering after the reaction is finished to obtain white solid or dark yellow liquid;
and 3, removing tetrahydrofuran solvent in the yellow liquid by rotary evaporation, dissolving in dichloromethane, regulating the pH value to be neutral by using a hydrochloric acid aqueous solution and a sodium chloride saturated aqueous solution, drying by using anhydrous sodium sulfate, filtering, rotary evaporating and drying, and then extracting by using petroleum ether and methanol to remove cyclic ether compounds and low molecular oligomers, thereby obtaining the BAMO-EG energetic copolyether with an alternating multi-block structure.
3. The glycidyl azide polyether-tetrahydrofuran energetic copolyether with alternating multiblock structure according to claim 2, and the synthesis method thereof, wherein: the molecular weight of the glycidyl azide polyether oligomer is Mn=0-2000.
4. The glycidyl azide polyether-tetrahydrofuran energetic copolyether with alternating multiblock structure according to claim 2, and the synthesis method thereof, wherein: the volume ratio of the glycidol azido polyether oligomer to the tetrahydrofuran solvent is 1:1 to 3.
5. The glycidyl azide polyether-tetrahydrofuran energetic copolyether with alternating multiblock structure according to claim 2, and the synthesis method thereof, wherein: the catalyst is potassium hydroxide, sodium hydride or sodium methoxide.
6. The glycidyl azide polyether-tetrahydrofuran energetic copolyether with alternating multiblock structure according to claim 2, and the synthesis method thereof, wherein: the molar ratio of the sodium/potassium end alcohol glycidyl azide polyether oligomer to the end para-toluenesulfonic acid polytetrahydrofuran is 1-4: 1.
7. the glycidyl azide polyether-tetrahydrofuran energetic copolyether with alternating multiblock structure according to claim 2, and the synthesis method thereof, wherein: the volume ratio of the para-toluenesulfonic acid polytetrahydrofuran to tetrahydrofuran is 1:1 to 3.
8. The glycidyl azide polyether-tetrahydrofuran energetic copolyether with alternating multiblock structure according to claim 2, and the synthesis method thereof, wherein: the time of the reflux reaction is 12-72 h.
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