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Emulsion polymerization method

Aug 12, 2016

A monomer emulsion and water allocationunder the emulsifier into the emulsion polymerization initiator is 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 emulsionpolymerization method. Press the nucleation mechanism is divided into micellarnucleation, homogeneous nucleation and droplet nucleation.

Emulsion polymerization and other methods,such as polymerization, solution polymerization, bulk, etc. Compared with manyunique advantages in emulsion polymerization, radical chain closed isolatedlatex particles. Each latex particles have a certain stability, not easy tomerge, the collision between the different latex particles suspended so thatthe probability of chain zero. It can only come from water diffusion primaryradical generating chain terminated. Therefore, emulsion radical chain in theaverage life expectancy is much longer, there is sufficient time to grow to ahigh molecular weight. Secondly, since the polymer latex seeds were small butindependent existence. Although high internal viscosity latex particles, butwith water as the continuous phase so that the viscosity of the entire reactionsystem is not high, so that the polymerization reaction heat easily spread therumor through the water. In addition, the emulsion with water as a medium, hasa lower cost, safety and less environmental pollution.

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