Spinning dope containing ultra-high molecular weight polyacrylonitrile and its preparation method and application
An ultra-high molecular weight, spinning dope technology, used in textiles and papermaking, fiber chemical characteristics, etc., can solve the problems of difficult filtration, easy to generate gel, low viscosity of spinning dope, achieve good technical effect and maintain stability Effect
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Embodiment 1
[0032]Add 90 g of distilled acrylonitrile (AN), 5 g of methyl methacrylate, 5 g of isobutyl acrylic acid, 100 g of N,N-dimethylformamide, and 0.001 g of azobisisoheptanonitrile (ABVN) into the reactor , under the protection of nitrogen, react at a constant temperature of 30°C for 1 hour, and then continue to add 300g of N,N-dimethylformamide and 0.5g of azobisisobutyronitrile (AIBN), at a constant temperature of 60°C The reaction was carried out under low temperature for 20 hours, and then the spinning solution was decompressed to remove residual monomers and air bubbles to obtain a spinning solution containing an ultra-high molecular weight acrylonitrile copolymer. After testing, the viscosity-average molecular weight of the ultra-high molecular weight copolymer component is 4.85 million, the molecular weight distribution is 2.34, the viscosity of the polyacrylonitrile spinning stock solution is 487Pa·S at 50°C, and the stock solution is easy to filter through 5μm during the s...
Embodiment 2
[0034] Add 92g of distilled acrylonitrile (AN), 2g of itaconic acid, 6g of acrylamide, 150g of N,N-dimethylformamide, and 0.01g of azobisisoheptanonitrile (ABVN) into the reactor, Under protection, react at a constant temperature of 40°C for 2 hours, then continue to add 300g of N,N-dimethylformamide and 0.8g of azobisisobutyronitrile (AIBN), and react at a constant temperature of 50°C for 24 hours , and then the spinning solution is decompressed to remove residual monomers and air bubbles to obtain a spinning solution containing an ultra-high molecular weight acrylonitrile copolymer. After testing, the viscosity-average molecular weight of the ultra-high molecular weight copolymer component is 4.59 million, the molecular weight distribution is 3.49, the viscosity of the polyacrylonitrile spinning stock solution is 455Pa·S at 50°C, and the stock solution is easy to filter through 5μm during the spinning process Filtration of materials, after 27 times of stretching, no broken f...
Embodiment 3
[0036] Add 93g of distilled acrylonitrile (AN), 3.5g of butyl β-itaconate, 3.5g of acrylamide oxime, 186g of N,N-dimethylacetamide, and 0.1g of azobisisoheptanonitrile (ABVN) In the reactor, under the protection of nitrogen, react at a constant temperature of 50°C for 3 hours, then continue to add N,N-dimethylformamide 100g and azobisisobutyronitrile (AIBN) 0.6g, at 55°C React at a constant temperature for 22 hours, and then the spinning solution is decompressed to remove residual monomers and air bubbles to obtain a spinning solution containing an ultra-high molecular weight acrylonitrile copolymer. After testing, the viscosity-average molecular weight of the copolymer component containing ultra-high molecular weight is 3 million, and the molecular weight distribution is 4.97. The viscosity-average molecular weight of the copolymer component B is 130,000, and the molecular weight distribution is 5.66. The viscosity of the polyacrylonitrile spinning stock solution is 50 ℃ The ...
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