Fusible polyacrylonitrile resin

Abstract

The polyacrylonitrile resin features that the polymer molecule chain contains copolymerized crotononitrile units in 10-15 wt% and the homogeneous copolymerization of acrylonitrile units and crotononitrile units. The polymer has viscosity-average molecular weight of 2000-4000. Crotononitrile used as copolymerized monomer has one more methylene group than acrylonitrile and thus can damage the hexatomic ring structure formed with adjacent acrylonitrile monomer and lower the ring forming probability in the molecular chain. In addition, the two kinds of unsaturated olefine monomer with cyano group have very high compatibility and near reactivity ratio, and this results in the easy control of reaction, fusible polymer for fusion processing and fusion spinning to produce polyacrylonitrile fiber. The addition of the copolymerized component has no influence to the spinning performance and the physical performance of fiber.

Description

technical field [0001] The invention relates to a high molecular polymer, in particular to a high molecular polymer whose polymerization monomer is acrylonitrile. Background technique [0002] Polyacrylonitrile resin is a high polymer with a wide range of uses, especially the fiber performance of polypropylene resin is similar to that of wool, and it occupies a large proportion in the total production of synthetic fibers. However, a defect of polyacrylonitrile resin is that the melting point (theoretical value is 319°C) is higher than the decomposition temperature (generally 250°C), so it cannot be processed by melting, and polyacrylonitrile fibers can usually only be processed by solution spinning. This spinning method uses a large amount of toxic, harmful or corrosive solvents. During the production process, the solvent must be recovered and purified, and the fibers must be washed and dried. Therefore, the process is complicated and the environment is seriously polluted. ...