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Binary copolymerized polyacrylonitrile-based carbon fiber spinning solution and preparation method thereof

A technology of binary copolymerization of polyacrylonitrile-based carbon fiber and spinning solution, which is applied in the fields of fiber chemical characteristics, single-component synthetic polymer rayon, textiles and papermaking, and can solve the complex preparation process and difficult large-scale production of raw silk And other issues

Inactive Publication Date: 2013-07-10
XIAN KANGBEN MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the problem that the preparation process of itaconic acid amides and esters hydrophilic comonomers is complicated and it is difficult to realize the large-scale production of precursors, the present invention proposes a method for preparing binary copolymerized polyacrylonitrile-based carbon fiber spinning solution

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  • Binary copolymerized polyacrylonitrile-based carbon fiber spinning solution and preparation method thereof
  • Binary copolymerized polyacrylonitrile-based carbon fiber spinning solution and preparation method thereof
  • Binary copolymerized polyacrylonitrile-based carbon fiber spinning solution and preparation method thereof

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Embodiment 1

[0022] This embodiment is a binary copolymerized polyacrylonitrile-based carbon fiber spinning solution and its preparation method.

[0023] The binary copolymerized polyacrylonitrile-based carbon fiber spinning solution uses dimethyl sulfoxide as a solvent, azobisisobutyronitrile as an initiator, and acrylonitrile and itaconic acid as polymer monomers. Acrylonitrile: the weight percent of itaconic acid is 99.0:1.0. The concentration of the polymer monomer is 20%. The consumption of azobisisobutyronitrile is 0.75% of monomer weight.

[0024] The preparation method that present embodiment proposes comprises the following steps:

[0025] Step 1, mixing ingredients. Weigh each material according to the ratio, and stir and mix the materials in the batching kettle.

[0026] Step 2, polymerization reaction. Put the prepared mixed materials into the polymerization tank, and use the conventional method to continue the polymerization reaction for 32 hours. During the polymerizati...

Embodiment 2

[0033] This embodiment is a binary copolymerized polyacrylonitrile-based carbon fiber spinning solution and its preparation method.

[0034] The binary copolymerized polyacrylonitrile-based carbon fiber spinning solution uses dimethyl sulfoxide as a solvent, azobisisobutyronitrile as an initiator, and acrylonitrile and itaconic acid as polymer monomers. Acrylonitrile: the weight percent of itaconic acid is 98.5:1.5. The monomer concentration of the polymer was 21%. The consumption of azobisisobutyronitrile is 0.75% of monomer weight.

[0035] The preparation method that present embodiment proposes comprises the following steps:

[0036] Step 1, mixing ingredients. Weigh each material according to the ratio, and stir and mix the materials in the batching kettle.

[0037] Step 2, polymerization reaction. Put the prepared mixed materials into the polymerization tank, and use the conventional method to continue the polymerization reaction for 32 hours. During the polymerizat...

Embodiment 3

[0044] This embodiment is a binary copolymerized polyacrylonitrile-based carbon fiber spinning solution and its preparation method.

[0045] The binary copolymerized polyacrylonitrile-based carbon fiber spinning solution uses dimethyl sulfoxide as a solvent, azobisisobutyronitrile as an initiator, and acrylonitrile and itaconic acid as polymer monomers. Acrylonitrile: the weight percent of itaconic acid is 99.0:1.0. The monomer concentration of the polymer was 22%. The consumption of azobisisobutyronitrile is 0.75% of monomer weight.

[0046] The preparation method that present embodiment proposes comprises the following steps:

[0047] Step 1, mixing ingredients. Weigh each material according to the ratio, and stir and mix the materials in the batching kettle.

[0048] Step 2, polymerization reaction. Put the prepared mixed materials into the polymerization tank, and use the conventional method to continue the polymerization reaction for 32 hours. During the polymerizat...

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Abstract

The invention relates to a binary copolymerized polyacrylonitrile-based carbon fiber spinning solution and a preparation method thereof. The spinning solution is prepared by taking dimethyl sulfoxide as a solvent, azodiisobutyronitrile as an initiator and acrylonitrile and itaconic acid as polymer monomers. The spinning solution is subjected to wet spinning, coagulating and molding, coagulation bath drafting, water washing, hot water dragging, oil coating, drying and compacting, saturated pressurized steam drafting, steam shaping and after-treatment, thereby obtaining a polyacrylonitrile protofilament. According to the testing, the monofilament tensile strength of the polyacrylonitrile protofilament is from 6.0 to 6.7 CN / dtex; the tensile modulus is from 100 to 110 N / dtex; the elongation at break is from 13.5 to 14.6%; the boiling water shrinkage is from 6.0 to 6.5%; the oil content rate is from 0.6 to 1.0%; and the fineness is 1.152 to 1.176 dtex. Under the observation of a microphotograph, the protofilament is round and bright in cross section and free of generating pores and holes. Based on the testing of preoxidation and carbonization, the strength of carbon fibers is from 3.8 to 4.2 GPa.

Description

technical field [0001] The invention relates to a method for preparing polyacrylonitrile-based carbon fiber spinning solution, in particular to a method for preparing binary copolymerized polyacrylonitrile-based carbon fiber spinning solution. Background technique [0002] Carbon fiber has the characteristics of high specific strength, high specific modulus, high temperature resistance, corrosion resistance, fatigue resistance, creep resistance, etc. It is a typical high-performance fiber and has been widely used in various military and civilian fields, and its application in composite materials is also being strengthened . Polyacrylonitrile-based carbon fibers have both good mechanical properties and low cost, and have become a hot research topic in the field of carbon fibers in recent years. The main raw material of polyacrylonitrile-based carbon fiber is polyacrylonitrile-based raw silk, and the most fundamental reason affecting the quality of the raw silk is the compreh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/46C08F222/02D01F9/22D01F6/38
Inventor 徐咏花李崇俊葛光涛赵晓莉许东
Owner XIAN KANGBEN MATERIAL
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