Research On Process Of Reciptation Polymerization Of Acrylonitrile In Water Phase

Taking the acrylonitrile(AN) as the first monomer of the production material, and the vinyl acetate(VAc) as the second monomer, Catalysts was a system caused by oxidized-reduced, chain transfer agent was the β-mercaptoethanol (β-ME) and so on, these production material manufacture qualified stock solution by the process which engaged in polymerization, termination, removing monomers, water scrubbing, admixture, dehydration, pulpifying, dissolution, filtration and defoaming. Which supply the spinning device.Compare with the AN-MMA comonomer, the content of the VAc was low in the AN-VAc, the transforming was based in polymerization, Process improvement and product improvement. First the spinning solution was high in solids, which made the solvent evaporation depleted very little and secondly Taking a low content of the copolymerization of two single namely the MMA containing 10.5% of the AN-MMA, and the VAc containing at around 8.5% of the AN-VAc, which allowed the product stable and the quality improved, thirdly by means of adjusting the formulation of raw materials and Optimization of polymerization process parameters, making the manufacture of a variety of polymer available.The AN-VAc biopolymer Being put to use in spinning can make a better strength in the Acrylic fiber. But in the productive process more stive and come into being Breaking machine process, more fragment in the gilling machine process, the cohesive force was lower in the productive process. The quality of the fiber has a little improved of free end in the spinning process. Get yam high quality and strength, and the woven fabric was of high quality. The competing dyeing speed of the AN-VAc fiber was a little slow, when the content of the pigment was low, it will cause the quality of each tone distinct. When the light color fiber was In the long production run two-tone fiber emerged. In the aspect of fouling and the heat transfer performance, AN-VAc biopolymer was essentially in agreement with the AN-MMA biopolymer.Through the polymerization process study of the aqueous phase precipitation of the acrylonitrile, optimizing the Polymerization process and improving the quality of the product and developing the difference of the Acrylic fiber.