CN101921395A - High-performance heterocyclic aramid fiber as well as preparation and application thereof - Google Patents
High-performance heterocyclic aramid fiber as well as preparation and application thereof Download PDFInfo
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Abstract
The invention relates to a high-performance heterocyclic aramid fiber as well as preparation and application thereof. Heterocycle is introduced to a high-polymer main chain by utilizing a method for ternary copolycondensation reaction and a method for participating a third heterocyclic monomer in copolycondensation, thereby the regularity of the high-polymer main chain is reduced, the degree of crystallization is reduced, and meanwhile very strong intermolecular hydrogen bonds are formed so that the high-performance heterocyclic aramid fiber has high elongation at break as well as high strength and high modulus. The invention also relates to preparation of a heterocyclic polyamide solution and a wet spinning method thereof. The wet spinning method comprises the steps of spinning, solidification, plastified stretching, water washing, oiling, drying, thermal treatment, surface treatment and the like. The breaking strength of the heterocyclic aramid fiber obtained in the method is 25-34 cN/dtex, the elastic modulus is 900-1200 cN/dtex, and the elongation at break is 2.5-4.0%. The high-performance heterocyclic aramid fiber can be used for preparing high-performance composite materials together with epoxy resins and other resins, and the heterocyclic aramid fiber/epoxy resin composite materials can be widely applied in the fields of war industries comprising missiles, armors, aerospace and the like.
Description
Technical field
The present invention relates to a kind of aramid fiber and preparation method thereof, more particularly, the present invention relates to a kind of high-performance heterocyclic aramid fiber and preparation thereof and application, belong to the specialty synthetic fibre field.
Background technology
Heterocycle aramid fiber is as a kind of modified aromatic polyamide fiber, be to utilize the method that contains heterocycle the 3rd monomer participation copolycondensation on high polymer main chain, to introduce heterocycle, thereby reduce the regularity of macromolecular chain, make it have intensity and the modulus higher than common aramid fiber (as aramid fiber 1313 and Fanglun l414 etc.), as Muscovite Apmoc fiber is exactly a kind of heterocycle aramid fiber, its breaking tenacity and Young's modulus exceed 38% and 20% than the Kevlar-49 aramid fiber (Fanglun l414) that du pont company is produced respectively, also kept higher elongation at break simultaneously, its elongation at break can reach more than 3.0%.Because the outstanding performance of heterocycle aramid fiber makes it become the preferred structure material of aerospace, military project, especially aspect the preparation high-performance war products extremely important application is being arranged, material of main part as the missile engine case of Russian SS series part model all adopts Russian Apmoc fiber, the vessel shell characterization factor is up to 35-45km, and motor mass fraction generally reaches 0.92-0.93.
In view of heterocycle aramid fiber special purpose militarily, Russia is extremely secret to the production technology of this fiber, simultaneously it is classified as the important strategic goods and materials, strictness restricts export, make some relevant therewith high-end weapons of China under one's control, therefore develop heterocycle aramid fiber to realizing the production domesticization of part sophisticated weapons material, the Development Schedule of quickening China a new generation weaponry etc. has the important strategic meaning.
Summary of the invention
The technical problem to be solved in the present invention is exactly from Molecular Structure Design, participate in the polymeric mode by heterocycle the 3rd monomer and on high polymer main chain, introduce heterocycle, and adopt means such as wet-spinning and thermal treatment, a kind of high-performance heterocyclic aramid fiber is provided and a kind of preparation method of high-performance heterocyclic aramid fiber is provided.
In order to realize above-mentioned technical purpose, technical solution of the present invention is as follows:
A kind of high-performance heterocyclic aramid fiber is characterized in that: have following structural formula:
Wherein the ratio of m and n is smaller or equal to 1, breaking tenacity 25-34cN/dtex, Young's modulus 900-1200cN/dtex, elongation at break 2.5-4.0%.
Above-mentioned a kind of high-performance heterocyclic aramid fiber is characterized in that: have following structure formula:
M=0 wherein.
Above-mentioned a kind of high-performance heterocyclic aramid fiber is characterized in that: have following structural formula:
Wherein the ratio of m and n is smaller or equal to 1 and be not equal to 0.
The preparation method of above-mentioned a kind of high-performance heterocyclic aramid fiber is characterized in that: processing step comprises: the preparation of heterocyclic polyamide solution, deaeration, wet-spinning.
Described processing step is specially:
The preparation of A, heterocyclic polyamide solution:
Method one: the amino benzoglyoxaline of 2-(4-aminophenyl)-5-is joined in the reactor that double solvents is housed, under the nitrogen protection stirring at room 50-150 minute, then temperature in the kettle is reduced to-5-10 ℃, divide 3-6 to criticize common adding p-phthaloyl chloride, every batch 10-100 minute at interval, obtaining polymer solids level at last is 2-10%, and kinetic viscosity is the polymers soln of 4-30 ten thousand centipoises;
Method two: the amino benzoglyoxaline of Ursol D and 2-(4-aminophenyl)-5-is joined in the reactor that double solvents is housed, and wherein the molar ratio of the amino benzoglyoxaline of Ursol D and 2-(4-aminophenyl)-5-is smaller or equal to 1 and be not equal to 0; Under the nitrogen protection stirring at room 50-150 minute, then temperature in the kettle is reduced to-5-10 ℃, divides 3-6 to criticize common adding p-phthaloyl chloride, every batch 10-100 minute at interval, obtaining polymer solids level at last is 2-10%, and kinetic viscosity is the polymers soln of 4-30 ten thousand centipoises;
B, deaeration, wet-spinning: above-mentioned polymers soln is transferred to normal pressure or vacuum deaerator and filtration in the deaeration still, adopt wet-spinning then, polymers soln is sprayed into by spinning nozzle that coagulation forming obtains nascent fibre in the precipitation bath, nascent fibre carries out plastic elongation with the stretch ratio of 50-150% again in plasticization drawing is bathed, then through washing, oil, dry, after thermal treatment and the surface treatment, be wound into tube, obtain breaking tenacity 25-34cN/dtex, Young's modulus 900-1200cN/dtex, the golden yellow aramid fiber of elongation at break 2.5-4.0%.
At the double solvents described in the preparation of heterocyclic polyamide solution is to contain the polar organic solvent that massfraction is the 2.0-7.0% solubility promoter;
Wherein: solubility promoter is lithium chloride or calcium chloride, and perhaps both is any than combination;
Polar organic solvent is N,N-DIMETHYLACETAMIDE or N-Methyl pyrrolidone.
The p-phthaloyl chloride described in the preparation of heterocyclic polyamide solution be the amino benzoglyoxaline of 2-(4-aminophenyl)-5-and Ursol D integral molar quantity or the amino benzoglyoxaline molar weight of 2-(4-aminophenyl)-5-0.992-1.008 doubly.
In the spinning nozzle aperture described in the step B is the 0.05-0.2 millimeter, and hole count is the 30-1000 hole.
In the precipitation bath described in the step B is that 10-40 ℃ massfraction is the N,N-DIMETHYLACETAMIDE aqueous solution of 40-65%.
The massfraction of bathing to air or 20-70 ℃ at the plasticization drawing described in the step B is the N,N-DIMETHYLACETAMIDE aqueous solution of 10-25%.
Adopt 80-98 ℃ deionized water in the washing described in the step B, water-washing method adopts spray-type, reverse-flow or immerseable.
In the drying described in the step B is contact roller drying, and temperature is 90-160 ℃.
In the thermal treatment described in the step B is under the nitrogen atmosphere, handles 0.5-4 minute for 320-420 ℃.
In the surface treatment described in the step B is the organic solvent solution that the aramid fiber tow is passed through continuously lower molecular weight aliphatic diisocyanate or glycols diglycidylether.
Described a kind of high-performance heterocyclic aramid fiber is used for the application of the high performance composite of military industry field in preparation.
Described a kind of high-performance heterocyclic aramid fiber is used for the application of the high performance composite of guided missile, plate armour, aerospace field in preparation.
The chemical equation that the present invention is used to prepare heterocycle aramid fiber can be expressed as:
The useful technique effect that the present invention brings: high-performance heterocyclic aramid fiber can be used as the material of main part of matrix material, makes matrix material have high-strength and high-modulus and high shear strength.Adopt on the high polymer main chain of heterocycle aramid fiber of preparation method of the present invention preparation and contain heterocycle, thereby reduce the regularity of macromolecular chain, reduce its degree of crystallinity, have high elongation when making it have high-strength and high-modulus, increase the toughness of fiber.Increase the interfacial bond property of itself and resin simultaneously by process for modifying surface, thereby improve the strength conversion ratio of fiber.Make the matrix material that obtains have high strength and high-modulus and high shear strength, make it can be applied in the high performance composite field, especially in the application of aspects such as guided missile, plate armour, aerospace.
Embodiment
Embodiment 1
The preparation of high-performance heterocyclic aramid fiber:
A, the lithium chloride massfractions that the amino benzoglyoxaline of 50.0 gram 2-(4-aminophenyl)-5-is joined 2136 grams are in 3.5% the dimethylacetamide solution; nitrogen protection is stirred after 1.5 hours down; be cooled to 8 ℃; divide 3 batches to add 45.3 gram p-phthaloyl chlorides altogether then; batch interval 25 minutes; obtaining polymer solids level at last is 4.0%, and kinetic viscosity is the polymers soln of 8.5 ten thousand centipoises.
B, with the deaeration of above-mentioned polymers soln normal pressure, carry out wet-spinning after the filtration, it is to form nascent fibre in 50% the N,N-DIMETHYLACETAMIDE aqueous solution that polymers soln sprays into 20 ℃ N,N-DIMETHYLACETAMIDE massfraction through the spinning nozzle of 330*0.05mm, nascent fibre carries out 110% stretching again in 60 ℃ N,N-DIMETHYLACETAMIDE massfraction is 20% the N,N-DIMETHYLACETAMIDE aqueous solution, spray-type washing through 80 ℃, oil, after 120 ℃ of dryings, the thermal treatment passage that enters 375 ℃ was handled 1.5 minutes, after surface treatment, be wound into tube again, breaking tenacity 26.3cN/dtex, Young's modulus 905.4cN/dtex, elongation at break 3.6%.
Embodiment 2
The preparation of high-performance heterocyclic aramid fiber:
A, with mol ratio be 2: 1 the amino benzoglyoxaline of 2-(4-aminophenyl)-5-and Ursol D the totally 49.5 grams lithium chloride massfractions that join 2000 grams be in 3.5% the dimethylacetamide solution; nitrogen protection is stirred after 2 hours down; be cooled to 8 ℃; divide 4 batches of addings totally 54.17 gram p-phthaloyl chlorides; batch interval 35 minutes; the polymer solids level that obtains at last is 4.0%, and kinetic viscosity is the polymers soln of 90,000 centipoises.
B, with the deaeration of above-mentioned polymers soln normal pressure, carry out wet-spinning after the filtration, it is to form nascent fibre in 50% the N,N-DIMETHYLACETAMIDE aqueous solution that polymers soln sprays into 20 ℃ N,N-DIMETHYLACETAMIDE massfraction through the spinning nozzle of 330*0.09mm, nascent fibre carries out 122% stretching again in 60 ℃ N,N-DIMETHYLACETAMIDE massfraction is 20% the N,N-DIMETHYLACETAMIDE aqueous solution, spray-type washing through 95 ℃, oil, after 120 ℃ of dryings, the thermal treatment passage that enters 380 ℃ was handled 1.5 minutes, after surface treatment, be wound into tube again, breaking tenacity 30.3cN/dtex, Young's modulus 1011.5cN/dtex, elongation at break 3.2%.
Embodiment 3
The preparation of high-performance heterocyclic aramid fiber:
A, with mol ratio be 2: 1 the amino benzoglyoxaline of 2-(4-aminophenyl)-5-and Ursol D the totally 49.5 grams lithium chloride massfractions that join 2000 grams be in 3.5% the dimethylacetamide solution; nitrogen protection is stirred after 2 hours down; be cooled to 8 ℃; divide 3 batches to add 53.78 gram p-phthaloyl chlorides altogether then; batch interval 55 minutes; obtaining polymer solids level at last is 4.0%, and kinetic viscosity is the polymers soln of 80,000 centipoises.
B, with the deaeration of above-mentioned polymers soln normal pressure, carry out wet-spinning after the filtration, it is to form nascent fibre in 50% the N,N-DIMETHYLACETAMIDE aqueous solution that polymers soln sprays into 20 ℃ N,N-DIMETHYLACETAMIDE massfraction through the spinning nozzle of 130*0.08mm, nascent fibre carries out 120% stretching again in 60 ℃ N,N-DIMETHYLACETAMIDE massfraction is 20% the N,N-DIMETHYLACETAMIDE aqueous solution, through 90 ℃ of spray-type washings, oil, after 120 ℃ of dryings, the thermal treatment passage that enters 380 ℃ was handled 1.5 minutes, after surface treatment, be wound into tube again, breaking tenacity 28.4cN/dtex, Young's modulus 962.7cN/dtex, elongation at break 3.0%.
Embodiment 4
The preparation of high-performance heterocyclic aramid fiber:
A, with mol ratio be 2: 1 the amino benzoglyoxaline of 2-(4-aminophenyl)-5-and Ursol D the totally 55.9 grams lithium chloride massfractions that join 2000 grams be in 3.5% the dimethylacetamide solution; nitrogen protection is stirred after 2 hours down; be cooled to 8 ℃; divide 6 batches to add 61.34 gram p-phthaloyl chlorides altogether then; batch interval 40 minutes; obtaining polymer solids level at last is 4.5%, and kinetic viscosity is the polymers soln of 130,000 centipoises.
B, with the deaeration of above-mentioned polymers soln normal pressure, carry out wet-spinning after the filtration, it is to form nascent fibre in 50% the N,N-DIMETHYLACETAMIDE aqueous solution that polymers soln sprays into 20 ℃ N,N-DIMETHYLACETAMIDE massfraction through the spinning nozzle of 330*0.1mm, nascent fibre carries out 122% stretching again in 60 ℃ N,N-DIMETHYLACETAMIDE massfraction is 20% the N,N-DIMETHYLACETAMIDE aqueous solution, through 85 ℃ of spray-type washings, oil, after 120 ℃ of dryings, the thermal treatment passage that enters 380 ℃ was handled 1.5 minutes, after surface treatment, be wound into tube again, breaking tenacity 26.8cN/dtex, Young's modulus 1006.8cN/dtex, elongation at break 3.2%.
Embodiment 5
The preparation of high-performance heterocyclic aramid fiber:
A, with mol ratio be 1.5: 1 the amino benzoglyoxaline of 2-(4-aminophenyl)-5-and Ursol D the totally 99.89 grams lithium chloride massfractions that join 4111 grams be in 3.5% the dimethylacetamide solution; nitrogen protection is stirred after 1.5 hours down; be cooled to 7 ℃; divide 5 batches to add 113.6 gram p-phthaloyl chlorides altogether; batch interval 60 minutes; the polymer solids level that obtains at last is 4.0%, and kinetic viscosity is the polymers soln of 100,000 centipoises.
B, with above-mentioned polymers soln vacuum deaerator, carry out wet-spinning after the filtration, it is to form nascent fibre in 50% the N,N-DIMETHYLACETAMIDE aqueous solution that polymers soln sprays into 20 ℃ N,N-DIMETHYLACETAMIDE massfraction through the spinning nozzle of 200*0.1mm, nascent fibre carries out 122% stretching again in 60 ℃ N,N-DIMETHYLACETAMIDE massfraction is 20% the N,N-DIMETHYLACETAMIDE aqueous solution, through 80 ℃ of spray-type washings, oil, after 125 ℃ of dryings, the thermal treatment passage that enters 380 ℃ was handled 2 minutes, after surface treatment, be wound into tube again, breaking tenacity 26.7cN/dtex, Young's modulus 1079.1cN/dtex, elongation at break 2.6%.
C, polymers soln normal pressure deaeration with above-mentioned steps A, carry out wet-spinning after the filtration, it is to form nascent fibre in 50% the N,N-DIMETHYLACETAMIDE aqueous solution that polymers soln sprays into 20 ℃ N,N-DIMETHYLACETAMIDE massfraction through the spinning nozzle of 650*0.08mm, nascent fibre carries out 130% stretching again in 60 ℃ N,N-DIMETHYLACETAMIDE massfraction is 20% the N,N-DIMETHYLACETAMIDE aqueous solution, through 95 ℃ of spray-type washings, oil, after 125 ℃ of dryings, enter then in 380 ℃ the thermal treatment passage, under nitrogen environment, handled 1.5 minutes, and after surface treatment, be wound into tube, breaking tenacity 25.5cN/dtex, Young's modulus 1048.9cN/dtex, elongation at break 2.55%.
Embodiment 6
The preparation of high-performance heterocyclic aramid fiber:
A, with mol ratio be 1.25: 1 the amino benzoglyoxaline of 2-(4-aminophenyl)-5-and Ursol D the totally 72.0 grams lithium chloride massfractions that join 3000 grams be in 3.5% the dimethylacetamide solution; nitrogen protection is stirred after 2.5 hours down; be cooled to 5 ℃; divide 4 batches to add 84.8 gram p-phthaloyl chlorides altogether then; batch interval 45 minutes; obtaining polymer solids level at last is 4.0%, and kinetic viscosity is the polymers soln of 80,000 centipoises.
B, with the deaeration of above-mentioned polymers soln normal pressure, carry out wet-spinning after the filtration, it is to form nascent fibre in 50% the N,N-DIMETHYLACETAMIDE aqueous solution that polymers soln sprays into 20 ℃ N,N-DIMETHYLACETAMIDE massfraction through the spinning nozzle of 330*0.2mm, nascent fibre carries out 90% stretching again in 60 ℃ N,N-DIMETHYLACETAMIDE massfraction is 19% the N,N-DIMETHYLACETAMIDE aqueous solution, through 90 ℃ of spray-type washings, oil, after 120 ℃ of dryings, enter then in 380 ℃ the thermal treatment passage, under nitrogen environment, handled 1.9 minutes, and after surface treatment, be wound into tube, breaking tenacity 28.1cN/dtex, Young's modulus 930.6cN/dtex, elongation at break 3.0%.
Embodiment 7
The preparation of high-performance heterocyclic aramid fiber:
A, with mol ratio be 1: 1 the amino benzoglyoxaline of 2-(4-aminophenyl)-5-and Ursol D the totally 96.97 grams lithium chloride massfraction that contains that joins 4107 grams be in 3.5% the dimethylacetamide solution; nitrogen protection is stirred after two hours down; be cooled to 7 ℃; divide 5 batches of addings totally 118.5 gram p-phthaloyl chlorides; batch interval 55 minutes; obtaining polymer solids level at last is 4.0%, and kinetic viscosity is the polymers soln of 80,000 centipoises.
B, with above-mentioned polymers soln vacuum deaerator, carry out wet-spinning after the filtration, it is to form nascent fibre in 50% the N,N-DIMETHYLACETAMIDE aqueous solution that polymers soln sprays into 20 ℃ N,N-DIMETHYLACETAMIDE massfraction through the spinning nozzle of 450*0.08mm, nascent fibre carries out 55% stretching again in 60 ℃ N,N-DIMETHYLACETAMIDE massfraction is 20% the N,N-DIMETHYLACETAMIDE aqueous solution, through 85 ℃ of spray-type washings, oil, after 120 ℃ of dryings, enter then in 385 ℃ the thermal treatment passage, under nitrogen environment, handled 2 minutes, and after surface treatment, be wound into tube, breaking tenacity 25.0cN/dtex, Young's modulus 965.1cN/dtex, elongation at break 2.78%.
C, polymers soln vacuum deaerator with above-mentioned steps A, carry out wet-spinning after the filtration, it is to form nascent fibre in 50% the N,N-DIMETHYLACETAMIDE aqueous solution that polymers soln sprays into 20 ℃ N,N-DIMETHYLACETAMIDE massfraction through the spinning nozzle of 200*0.1mm, nascent fibre carries out 112% stretching again in 60 ℃ N,N-DIMETHYLACETAMIDE massfraction is 20% the N,N-DIMETHYLACETAMIDE aqueous solution, through 90 ℃ of spray-type washings, oil, after 120 ℃ of dryings, enter then in 385 ℃ the thermal treatment passage, under nitrogen environment, handled 2 minutes, and after surface treatment, be wound into tube, breaking tenacity 27cN/dtex, Young's modulus 1078.8cN/dtex, elongation at break 2.61%.
Embodiment 8
Surface treatment:
The preparation of A, surface treatment agent: the propylene glycol diglycidylethers of 50 grams are joined in the isopropylcarbinols of 950 grams, form massfraction and be the isobutanol solution of 5.0% propylene glycol diglycidylether, stir.
B, surface treatment: the aramid fiber tow there is the U type sulculus of spray orifice continuously with the speed of 15m/min by a bottom, the described surface treatment agent ejection of steps A of continuous constant pressure is arranged in the spray orifice, and the submergence aramid fiber.
C, drying: will adopt hot cylinder contact drying and forced air drying by the tow behind the surface treatment agent and carry out drying with mode, 120 ℃ of drying temperatures, 3 minutes time.
Claims (17)
1. high-performance heterocyclic aramid fiber is characterized in that: have following structural formula:
Wherein the ratio of m and n is smaller or equal to 1, breaking tenacity 25-34cN/dtex, Young's modulus 900-1200cN/dtex, elongation at break 2.5-4.0%.
2. a kind of high-performance heterocyclic aramid fiber according to claim 1 is characterized in that: have following structure formula:
M=0 wherein.
3. a kind of high-performance heterocyclic aramid fiber according to claim 1 is characterized in that: have following structural formula:
Wherein the ratio of m and n is smaller or equal to 1 and be not equal to 0.
4. the preparation method of a kind of high-performance heterocyclic aramid fiber according to claim 1, it is characterized in that: processing step comprises: the preparation of heterocyclic polyamide solution, deaeration, wet-spinning.
5. the preparation method of a kind of high-performance heterocyclic aramid fiber according to claim 4, it is characterized in that: described processing step is specially:
The preparation of A, heterocyclic polyamide solution: the amino benzoglyoxaline of 2-(4-aminophenyl)-5-is joined in the reactor that double solvents is housed, under the nitrogen protection stirring at room 50-150 minute, then temperature in the kettle is reduced to-5-10 ℃, divide 3-6 to criticize common adding p-phthaloyl chloride, every batch 10-100 minute at interval, obtaining polymer solids level at last is 2-10%, and kinetic viscosity is the polymers soln of 4-30 ten thousand centipoises;
B, deaeration, wet-spinning: above-mentioned polymers soln is transferred to normal pressure or vacuum deaerator and filtration in the deaeration still, adopt wet-spinning then, polymers soln is sprayed into by spinning nozzle that coagulation forming obtains nascent fibre in the precipitation bath, nascent fibre carries out plastic elongation with the stretch ratio of 50-150% again in plasticization drawing is bathed, then through washing, oil, dry, after thermal treatment and the surface treatment, be wound into tube, obtain breaking tenacity 25-34cN/dtex, Young's modulus 900-1200cN/dtex, the golden yellow aramid fiber of elongation at break 2.5-4.0%.
6. according to the preparation method of claim 4 or 5 described a kind of high-performance heterocyclic aramid fibers, it is characterized in that: the preparation method of described heterocyclic polyamide solution is:
The amino benzoglyoxaline of Ursol D and 2-(4-aminophenyl)-5-is joined in the reactor that double solvents is housed, and wherein the molar ratio of the amino benzoglyoxaline of Ursol D and 2-(4-aminophenyl)-5-is smaller or equal to 1 and be not equal to 0; Under the nitrogen protection stirring at room 50-150 minute; then temperature in the kettle is reduced to-5-10 ℃, divides 3-6 to criticize common adding p-phthaloyl chloride, every batch 10-100 minute at interval; obtaining polymer solids level at last is 2-10%, and kinetic viscosity is the polymers soln of 4-30 ten thousand centipoises.
7. according to the preparation method of claim 5 or 6 described a kind of high-performance heterocyclic aramid fibers, it is characterized in that: at the double solvents described in the preparation of heterocyclic polyamide solution is to contain the polar organic solvent that massfraction is the 2.0-7.0% solubility promoter;
Wherein: solubility promoter is lithium chloride or calcium chloride, and perhaps both is any than combination;
Polar organic solvent is N,N-DIMETHYLACETAMIDE or N-Methyl pyrrolidone.
8. according to the preparation method of claim 5 or 6 described a kind of high-performance heterocyclic aramid fibers, it is characterized in that: the p-phthaloyl chloride described in the preparation of heterocyclic polyamide solution be the amino benzoglyoxaline of 2-(4-aminophenyl)-5-and Ursol D integral molar quantity or the amino benzoglyoxaline molar weight of 2-(4-aminophenyl)-5-0.992-1.008 doubly.
9. the preparation method of a kind of high-performance heterocyclic aramid fiber according to claim 5, it is characterized in that: in the spinning nozzle aperture described in the step B is the 0.05-0.2 millimeter, hole count is the 30-1000 hole.
10. the preparation method of a kind of high-performance heterocyclic aramid fiber according to claim 5 is characterized in that: in the precipitation bath described in the step B is that 10-40 ℃ massfraction is the N,N-DIMETHYLACETAMIDE aqueous solution of 40-65%.
11. the preparation method of a kind of high-performance heterocyclic aramid fiber according to claim 5 is characterized in that: the massfraction of bathing to air or 20-70 ℃ at the plasticization drawing described in the step B is the N,N-DIMETHYLACETAMIDE aqueous solution of 10-25%.
12. the preparation method of a kind of high-performance heterocyclic aramid fiber according to claim 5 is characterized in that: adopt 80-98 ℃ deionized water in the washing described in the step B, water-washing method adopts spray-type, reverse-flow or immerseable.
13. the preparation method of a kind of high-performance heterocyclic aramid fiber according to claim 5 is characterized in that: in the drying described in the step B is contact roller drying, and temperature is 90-160 ℃.
14. the preparation method according to the described a kind of high-performance heterocyclic aramid fiber of claim 5 is characterized in that: in the thermal treatment described in the step B is under the nitrogen atmosphere, handles 0.5-4 minute for 320-420 ℃.
15. the preparation method according to the described a kind of high-tensile high-model heterocycle aramid fiber of claim 5 is characterized in that: in the surface treatment described in the step B is the organic solvent solution that the aramid fiber tow is passed through continuously lower molecular weight aliphatic diisocyanate or glycols diglycidylether.
16. a kind of high-performance heterocyclic aramid fiber according to claim 1 is used for the application of the high performance composite of military industry field in preparation.
17. be used for the application of the high performance composite of guided missile, plate armour, aerospace field in preparation according to claim 1 or 16 described a kind of high-performance heterocyclic aramid fibers.
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