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In the industrial production of vinyl chloride homopolymer, according to the field of resin application, five kinds of production methods are generally adopted, namely bulk polymerization, suspension polymerization, emulsion polymerization, microsuspension polymerization and solution polymerization.
Although the polymerization process is different, several methods have the same polymerization mechanism, that is, free radical polymerization. Among the resins produced by these methods, the suspension method has the highest yield. Because of the low investment and production cost of the suspension polymerization process and wide application fields, the development direction of various polymerization methods is gradually tilting to the production route of suspension polymerization. Some kinds of resins used to be produced by other methods in the past. A suspension polymerization process has been introduced.