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Jun 7, 2017
A monomer emulsion and water allocationunder the emulsifier into the emulsion, polymerization initiator was added at acertain temperature. The system is mainly composed of monomer, water,emulsifier and initiator composed of four basic components. Emulsionpolymerization process is divided by the use of a batch process, semi-continuous,continuous, top seed emulsification and emulsion polymerization method. Pressthe nucleation mechanism is divided into micellar nucleation, homogeneousnucleation and droplet nucleation.
Emulsion polymerization and other methods,such as bulk polymerization, solution polymerization, etc. Compared with manyunique advantages. In the emulsion polymerization, radical chain closedisolated latex particles, latex particles each having a certain stability. Noteasy to merge, the collision between the different latex particles suspended sothat the probability of chain zero. It can only come from water diffusionprimary radical generating chain terminator, so the average life expectancy,such as emulsion radical chain to be much longer. Have sufficient time to growto a high molecular weight. Secondly, since the polymer latex seeds were smallbut exist independently, although a high internal viscosity of the latexparticles, but with water as the continuous phase so that the viscosity of theentire reaction system is not high so that the polymerization reaction heateasily spread the rumor through the water. In addition, the emulsion with wateras a medium, has a lower cost, safety and less environmental pollution.