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Subject - Macromolecular Chemistry
Besides polyethylene, polyvinyl chloride (PVC) is one of the most widely produced plastics which can be used in different applications depending on additives and the production process.
Starting vinyl chloride is synthesized from chlorine and ethylene. Radical polymerization of vinyl chloride to crude PVC is then carried out by either emulsion-, suspension- or bulk polymerization. Subsequently, additives such as plasticizers, pigments, lubricants, flame retardants, stabilizers are added. A difference is made between soft PVC (high percentage of plasticizer) and hard PVC (low proportion of plasticizer).