Acrylonitrile copolymer spinning solution with uniform chain structure and narrow molecular-weight distribution and preparation method thereof
A technology of acrylonitrile and copolymer, applied in the field of acrylonitrile copolymer spinning solution and its preparation, can solve the problems of poor uniformity in the microscopic physical structure and chemical reactivity of the precursor, adverse effects on the properties of carbon fibers, etc., and achieve excellent spinnability. Performance, high chain structure uniformity, high conversion effect
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Embodiment 1
[0032] (1) Accurately weigh 26.25Kg of solvent dimethyl sulfoxide and 13.5Kg of the first monomer acrylonitrile and join in the stainless steel reactor A with condenser and mechanical stirring device, stir and mix at room temperature, while nitrogen bubbling protection, Heat up to 60°C on one side;
[0033] (2) Accurately weigh 8.75Kg of the solvent dimethyl sulfoxide and 1.5Kg of the second comonomer itaconic acid and add it to a stainless steel dropping kettle B with a mechanical stirring device, stir and mix at room temperature, and bubble nitrogen for 60 minutes;
[0034] (3) Under nitrogen protection and stirring, 75g free radical initiator azobisisobutyronitrile is thrown into reaction kettle A at one time, and the solution prepared in step (2) is added dropwise to kettle B within 4 hours. Add it to reaction kettle A, stir and react at a constant temperature of 65°C for 6 hours, and then remove residual monomers and air bubbles to obtain an acrylonitrile copolymer spinni...
Embodiment 2
[0036](1) Accurately weigh 24Kg of solvent dimethyl sulfoxide and 9.75Kg of the first monomer acrylonitrile into a stainless steel reactor A with a condenser and a mechanical stirring device, stir and mix at room temperature, while nitrogen bubbling protection, while Heat up to 60°C;
[0037] (2) Accurately weigh 16Kg of the solvent dimethyl sulfoxide and 250g of the second comonomer itaconic acid and add it to a stainless steel dropping kettle B with a mechanical stirring device, stir and mix at room temperature, and bubble nitrogen for 30 minutes;
[0038] (3) Under nitrogen protection and stirring, 60g free radical initiator azobisisobutyronitrile is thrown into reaction kettle A at one time, and the solution prepared in step (2) is added dropwise to kettle B within 4 hours. Add it to the reaction kettle A, stir and react at a constant temperature of 60°C for 24 hours, and then remove residual monomers and air bubbles to obtain an acrylonitrile copolymer spinning solution w...
Embodiment 3
[0040] (1) Accurately take by weighing 31.2Kg solvent dimethyl sulfoxide, the first monomer acrylonitrile of 10.67Kg and the third comonomer methyl acrylate of 220g join in the stainless steel reactor A that has condenser and mechanical stirring device, Stir and mix at room temperature, and raise the temperature to 50°C while nitrogen bubbling is protected;
[0041] (2) Accurately weigh 7.8Kg of solvent dimethyl sulfoxide and 110g of second comonomer acrylic acid and join in the stainless steel dripping kettle B with a mechanical stirring device, stir and mix at room temperature, and bubble nitrogen for 30 minutes;
[0042] (3) Under nitrogen protection and stirring, 55g free radical initiator azobisisoheptanonitrile is thrown into reaction kettle A at one time, and the solution prepared in step (2) is added dropwise to kettle B within 3 hours. Add it to reactor A, stir and react at 50°C for 18 hours, then remove residual monomers and air bubbles to obtain an acrylonitrile cop...
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