Acrylonitrile terpolymer spinning fluid containing hydrophilic group and preparation thereof

A technology of acrylonitrile terpolymer spinning and hydrophilic groups, which is applied in the direction of single-component synthetic polymer rayon, textiles and papermaking, and fiber chemical characteristics, which can solve the difference in reactivity ratio and difficult to obtain acrylonitrile copolymerization to achieve the diffusion promotion of cyclization exotherm, reduce crosslinking and microgel, and improve the effect of promotion

Inactive Publication Date: 2009-04-22
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the reactivity ratios of these two monomers and acrylonitrile are very different, and it is difficult to obtain an acrylonitrile copolymer with a uniform chain structure.

Method used

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  • Acrylonitrile terpolymer spinning fluid containing hydrophilic group and preparation thereof
  • Acrylonitrile terpolymer spinning fluid containing hydrophilic group and preparation thereof
  • Acrylonitrile terpolymer spinning fluid containing hydrophilic group and preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Solvent dimethyl sulfoxide, main monomer acrylonitrile, comonomer ViEtIm + Br - And β-MMI, the free radical initiator azobisisoheptanonitrile, was added to the reactor with a condenser and a mechanical stirring device. The weight percent of added raw material is: main monomer acrylonitrile is 98% of monomer gross weight, comonomer ViEtIm + Br - 1% of the total weight of the monomers, the comonomer β-MMI is 1% of the total weight of the monomers, the amount of azobisisoheptanonitrile is 0.5% of the total weight of the monomers, and the total concentration of the monomers is 20% by weight . The mixture was stirred and mixed at room temperature. After bubbling nitrogen for 20 minutes, under the protection of nitrogen, it was reacted at a constant temperature of 35°C for 24 hours, and then the residual gas and bubbles were removed in a vacuum to obtain an acrylonitrile spinning solution containing hydrophilic groups. . The weight-average molecular weight of the copolym...

Embodiment 2

[0028] Solvent dimethyl sulfoxide, main monomer acrylonitrile, comonomer ViEtIm + Cl - And β-MEI, a free radical initiator azobisisoheptanonitrile, was added to the reactor with a condenser and a mechanical stirring device. The weight percentage of added raw material is: main monomer acrylonitrile is 96% of monomer gross weight, comonomer ViEtIm + Cl - 3% of the total weight of the monomers, the comonomer β-MEI is 1% of the total weight of the monomers, the amount of azobisisoheptanonitrile is 0.8% of the total weight of the monomers, and the total concentration of the monomers by weight is 23.5% . The mixture was stirred and mixed at room temperature. After bubbling nitrogen for 20 minutes, under the protection of nitrogen, it was reacted at a constant temperature of 35°C for 24 hours, and then the residual gas and bubbles were removed in a vacuum to obtain an acrylonitrile spinning solution containing hydrophilic groups. . The weight-average molecular weight of the copo...

Embodiment 3

[0030] Solvent dimethyl sulfoxide, main monomer acrylonitrile, comonomer ViMeIm + Cl - And β-MPI, a free radical initiator azobisisoheptanonitrile, was added to the reactor with a condenser and a mechanical stirring device. The weight percent of added raw material is: main monomer acrylonitrile is 96% of monomer gross weight, comonomer ViMeIm + Cl - 3% of the total weight of the monomers, the comonomer β-MPI is 1% of the total weight of the monomers, the amount of azobisisoheptanonitrile is 0.5% of the total weight of the monomers, and the total concentration of the monomers by weight is 20.0% . The mixture was stirred and mixed at room temperature. After bubbling nitrogen for 20 minutes, under the protection of nitrogen, it was reacted at a constant temperature of 35°C for 24 hours, and then the residual gas and bubbles were removed in a vacuum to obtain an acrylonitrile spinning solution containing hydrophilic groups. . The weight-average molecular weight of the copolym...

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Abstract

The invention relates to an acrylonitrile terpolymer spinning solution containing hydrophilic groups and a preparation method. The preparation method comprises the following steps: in dimethyl sulfoxide solution, using azo-bis-iso-heptonitrile to initiate acrylonitrile, itaconate beta-monoester and vinyl imidazole salt to carry out copolymerization reaction, using small amount of chain transfer agent to adjust molecular weight of the copolymer, and synthesizing the acrylonitrile terpolymer at a temperature of between 25 and 45 DEG C, wherein the molecular weight of the acrylonitrile terpolymer is controllable to between 100, 000 and 500, 000, and distribution index of the molecular weight is lower than 2.3. The acrylonitrile terpolymer spinning solution has the characteristics of controllable molecular weight, even chain structure, narrower molecular weight distribution, and excellent hydrophilicity.

Description

[0001] Field [0002] The invention relates to a spinning liquid of acrylonitrile terpolymer containing hydrophilic groups and a preparation method thereof, in particular to spinning polyacrylonitrile-based carbon fiber containing a structural unit of a highly hydrophilic ionic monomer vinylimidazolium salt Liquid preparation method. Background technique [0003] Carbon fiber is widely used in aerospace, national defense construction and civil industry due to its excellent mechanical properties, high temperature resistance, corrosion resistance and other properties. Acrylonitrile-based carbon fiber spinning solution is one of the main sources of carbon fiber preparation. How to improve the performance of carbon fiber has become a hot spot in carbon fiber research in recent years. Studies have shown that acrylonitrile copolymers with high molecular weight and narrow molecular weight distribution are one of the keys to obtain high-performance carbon fibers. [0004] The origin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/38C08F220/44C08F222/16C08F226/06C08F4/04D01F9/22
Inventor 李悦生李百祥张贵宝刘晓辉白云刚
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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