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High-performance chloric heterocyclic aramid fiber as well as preparation method and application

A heterocyclic aramid, high-performance technology, applied in the field of special synthetic fibers, can solve problems such as not having too many advantages, and achieve the effect of improving surface properties, good wettability and binding force, and improving surface activity

Active Publication Date: 2015-02-18
CHINA BLUESTAR CHENGRAND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the strength of fluorine-containing polyamide fiber prepared by this method is only 18-21cN / dtex, which is not much advantage compared with aramid fiber 1414. Therefore, an aramid fiber with improved composite performance and better fiber performance is more needed product

Method used

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  • High-performance chloric heterocyclic aramid fiber as well as preparation method and application
  • High-performance chloric heterocyclic aramid fiber as well as preparation method and application
  • High-performance chloric heterocyclic aramid fiber as well as preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A. Combine 2,5-dichloro-p-phenylenediamine (15.35g), p-phenylenediamine (18.73g), 2-(4-aminophenyl)-5-aminobenzene with a molar ratio of 0.34:0.66:1 Add imidazole (58.27g) to 4000g of dimethylacetamide solution containing 3.5% lithium chloride (140g) by mass, stir at 25℃ for 1 hour under nitrogen protection, then cool to 7℃, then Add 105.62 grams of terephthaloyl chloride in 3 batches, stir and react for 2 hours to obtain a polymer solution with a polymer solid content of 4.0% and a dynamic viscosity of 85,000 cps;

[0037] B. The above polymer solution is degassed at normal pressure, filtered and then subjected to wet spinning. The polymer solution is sprayed into dimethylacetamide with a mass fraction of 50% dimethylacetamide at 20°C through a 320*0.09mm spinneret. The nascent fiber is formed in the acetamide aqueous solution, and the nascent fiber is stretched by 110% in a dimethylacetamide aqueous solution with a mass fraction of 20% dimethylacetamide at 60°C, and wash...

Embodiment 2

[0039] A. Combine 2,5-dichloro-p-phenylenediamine (2.83g), p-phenylenediamine (15.59g) and 2-(4-aminophenyl)-5-aminobenzene with a molar ratio of 0.05:0.45:1 Add imidazole (71.84g) to 3820g of dimethylacetamide solution containing 3.5% lithium chloride (133.7g) by mass, stir at 35℃ for 40 minutes under nitrogen protection, and then cool to 5℃. Then a total of 97.65 g of terephthaloyl chloride was added in 2 batches, and after stirring and reacting for 2 hours, a polymer solution with a polymer solid content of 4.0% and a dynamic viscosity of 100,000 cps was obtained;

[0040] B. Degas the above polymer solution at normal pressure, filter, and perform wet spinning. The polymer solution is sprayed into dimethylacetamide with a mass fraction of 50% dimethylacetamide at 20°C through a 330*0.08mm spinneret. The nascent fiber is formed in the acetamide aqueous solution, and the nascent fiber is stretched by 110% in a dimethylacetamide aqueous solution with a mass fraction of 20% dimeth...

Embodiment 3

[0042] A. Combine 2-chloro-p-phenylenediamine (7.99 g), p-phenylenediamine (24.24 g), 2-(4-aminophenyl)-5-aminobenzimidazole ( 62.84g) was added to 4000g of dimethylacetamide solution containing 3.0% lithium chloride (120g) by mass, stirred at 30℃ for 1 hour under nitrogen protection, cooled to 7℃, and then divided into 3 batches A total of 113.89 grams of terephthaloyl chloride was added, and after stirring and reacting for 2.5 hours, a polymer solution with a polymer solid content of 4.2% and a dynamic viscosity of 110,000 cps was obtained;

[0043] B. The above polymer solution is degassed at normal pressure, filtered and then subjected to wet spinning. The polymer solution is sprayed into dimethylacetamide with a mass fraction of 50% dimethylacetamide at 20°C through a 320*0.09mm spinneret. The nascent fiber is formed in the acetamide aqueous solution, and the nascent fiber is stretched by 110% in a dimethylacetamide aqueous solution with a mass fraction of 20% dimethylacetam...

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Abstract

The invention relates to a high-performance chloric heterocyclic aramid fiber as well as a preparation method and application. A chloric group and a heterocyclic ring unit are introduced on an aramid fiber macromolecular chain in a copolymerization manner, the binding force of the fiber and resin is improved while the high performance of the fiber is met, and the fiber has good performance conversion rate when being applied to the field of reinforced composite materials. The preparation method comprises the processing steps of preparing chloric heterocyclic polyamide solution, and carrying out defoaming, spinning, solidifying, stretching in a plastifying manner, washing, oiling, drying and heat treatment on the polyamide solution to obtain the high-performance chloric heterocyclic aramid fiber. The high-performance chloric heterocyclic aramid fiber is 24-32cN / dtex in elongation at break, 700-1100cN / dtex in elasticity modulus, is 2.3-4.0% in elongation at break, has excellent performances such as high strength, high modulus and the like, and has good binding property with the resin, and the reinforced resin composite material product has potential application prospect in the fields such as aviation, space flight, ships and warships, weapons, electronic and the like.

Description

technical field [0001] The invention relates to an aramid fiber and its preparation method. More specifically, the invention relates to a chlorine-containing high-performance heterocyclic aramid fiber, its preparation method and application, and belongs to the field of special synthetic fibers. Background technique [0002] As a modified aromatic polyamide fiber, heterocyclic aramid fibers are introduced into the main chain of the polymer by using the third monomer containing a heterocyclic ring to participate in co-condensation polymerization, thereby reducing the regularity of the polymer chain and making it It has higher strength and modulus than ordinary para-aramid (aramid 1414). For example, Russia's Armos fiber and the F-3 series aramid of Zhonglan Chenguang Chemical Research and Design Institute Co., Ltd. are heterocyclic aramids. The breaking strength and elastic modulus of aramid are 30% and 20% higher than the Kevlar-49 aramid (aramid 1414) produced by DuPont in t...

Claims

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Application Information

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IPC IPC(8): D01F6/80C08G69/32D01D5/06D01D1/10D01D10/02D01D10/06
Inventor 陈超峰彭涛王凤德兰江杨文良龚维友
Owner CHINA BLUESTAR CHENGRAND CO LTD
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