Preparation of mass polymerization ABS

The greatest difference between the ABS mass process and the HIPS mass process is the presence or absence of acrylonitrile monomer, but in the two processes there are many other similar points. See Fig. 6.4. Any other differences between the two processes involve the method for removing reaction heat, the radial and vertical mixing extent, the numbers of reactors, etc. The reaction heat can be removed by means of boihng and reflux coohng, heat-transfer surface, addition of low-temperature monomer and solvent, etc. 

The radial mixing plays a role in preventing the deviation of temperature and concentration in the reactors. Such deviation forms the layer on the surface of the reactor wall, to adversely influence the removal of reaction heat, and eventually influences the quality of products. 

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