Polyacrylonitrile as well as preparation method and application thereof
A technology of polyacrylonitrile and polymerization reaction, applied in textiles and papermaking, single-component synthetic polymer rayon, fiber chemical characteristics, etc., can solve the problems of reducing production efficiency and product quality, increasing production cost, and slow drying speed , to achieve the effect of low cost
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[0037] The invention provides a preparation method of polyacrylonitrile, which is obtained by the polymerization of raw materials comprising the following parts by mass:
[0038]
[0039] The first auxiliary monomer includes one or more of vinyl ester monomer, vinyl imidazole, 4-acryloyl morpholine and styrene;
[0040] The second auxiliary monomer includes one or more of vinyl acid-based monomers, vinylamine-based monomers, vinylamide-based monomers and ammonium salts of vinyl acids;
[0041]The polymerization medium comprises one or more of dimethyl carbonate, diethyl carbonate, dibutyl carbonate, methyl bicarbonate, ethyl methyl carbonate, propyl methyl carbonate and butyl methyl carbonate;
[0042] The preparation method of the polyacrylonitrile comprises the following steps:
[0043] The raw materials are mixed to carry out a polymerization reaction to obtain a polyacrylonitrile-containing suspension;
[0044] The unreacted monomer and polymerization medium in the su...
Embodiment 1
[0080] 24.2 parts of acrylonitrile, 0.25 parts of itaconic acid, 0.5 parts of methyl acrylate and 70 parts of dimethyl carbonate were stirred for 5 min under nitrogen protection and a rotating speed of 160 r / min to obtain primary mixed raw materials; under nitrogen protection, 0.05 parts of Azobisisobutyronitrile and 5 parts of dimethyl carbonate were mixed to obtain an initiator solution; under nitrogen protection, the primary mixed raw materials and the initiator solution were stirred at a rotational speed of 160 r / min for 2 min to obtain a mixed raw material;
[0081] Under the protection of nitrogen, the rotating speed is 160r / min, the temperature is 60°C, and the relative pressure is 0MPa to carry out the polymerization reaction for 10h (the total mass conversion rate of the polymerized monomer is 61%), and the solid content is 15.25% polyacrylonitrile suspension is obtained by removing monomers, removing solvent, washing and drying to obtain polyacrylonitrile powder, the ...
Embodiment 2
[0085] 29.04 parts of acrylonitrile, 0.3 parts of itaconic acid, 0.6 parts of methyl acrylate and 65 parts of dimethyl carbonate were stirred for 5 min under nitrogen protection and a rotating speed of 160 r / min to obtain primary mixed raw materials; under nitrogen protection, 0.06 parts of Azobisisobutyronitrile and 5 parts of dimethyl carbonate were mixed to obtain an initiator solution; under nitrogen protection, the primary mixed raw materials and the initiator solution were stirred at a rotational speed of 160 r / min for 2 min to obtain a mixed raw material;
[0086] Under the protection of nitrogen, the rotating speed is 160r / min, the temperature is 60°C, and the relative pressure is 0MPa to carry out the polymerization reaction for 10h (the total mass conversion rate of the polymerized monomer is 68%), and the solid content is obtained. 20.4% polyacrylonitrile suspension is obtained by removing monomers, removing solvent, washing and drying to obtain polyacrylonitrile pow...
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