Polyacrylonitrile copolymer spinning solution and preparation method thereof

A technology of polyacrylonitrile and copolymer, which is applied in the field of polyacrylonitrile copolymer spinning solution and its rapid and stable preparation, can solve problems such as mass transfer, heat transfer difficulties, affecting fiber performance, and prone to implosion, etc., to achieve Enhanced mass transfer and heat transfer, narrow molecular weight distribution, no need for mechanical stirring
CN103421141AActive Publication Date: 2013-12-04INST OF CHEM CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Applications(China)
Current Assignee / Owner
INST OF CHEM CHINESE ACAD OF SCI
Publication Date
2013-12-04

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Abstract

The invention relates to a polyacrylonitrile copolymer spinning solution and a preparation method thereof. In the invention, copolymerization reaction is performed on acrylonitrile in a tubular reactor containing a static mixer component; the tubular reactor, which contains the static mixer component and has the characteristics of mass transfer, efficient heat transfer, continuous and stable reaction and no mechanical stirring, is adopted to prepare the polyacrylonitrile copolymer spinning solution with high molecular weight and narrow molecular weight distribution. The polyacrylonitrile copolymer spinning solution is obtained after copolymerization reaction is performed on reaction liquid composed of monomers, a radical initiator and a solvent, wherein the percent concentration by weight of the monomers in the reaction liquid is 15% to 20%; the weight of the radical initiator is 0.4% to 1% of that of the monomers; the solvent is in balancing amount; the monomers are an acrylonitrile monomer and a comonomer. The dynamic viscosity of the polyacrylonitrile copolymer spinning solution provided by the invention is 200 to 800 Pa.S, and the molecular weight distribution is 1.5 to 2.6.
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Description

technical field

[0001] The invention belongs to the field of polyacrylonitrile preparation, in particular to a polyacrylonitrile copolymer spinning solution with uniform viscosity and narrow molecular weight distribution and a rapid and stable preparation method thereof. Background technique

[0002] Carbon fiber has the characteristics of high specific strength, high specific modulus, heat resistance, corrosion resistance, fatigue resistance, and creep resistance. It is a high-performance fiber material and has been widely used in aerospace, national defense construction, sports and leisure products, and medical equipment. and construction industries. Polyacrylonitrile-based carbon fiber has outstanding mechanical properties and is a hot spot in carbon fiber research and industrialization in recent years. The key to restricting the development of polyacrylonitrile-based carbon fibers is the quality of polyacrylonitrile precursors, and to obtain high-quality polyacrylonitri...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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