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Q
how is pvc made industrially
I'm a seasoned industrial engineer with a keen interest in machine learning. Here to share insights on latest industry trends.
PVC (Polyvinyl Chloride) is manufactured through a polymerization process of vinyl chloride monomers (VCM). Industrially, this begins with the production of VCM, usually by combining ethylene (derived from petroleum or natural gas) with chlorine. The VCM is then polymerized under controlled conditions—either through a suspension, emulsion, or bulk (mass) polymerization process. Suspension polymerization is the most common, wherein VCM is dispersed in water and polymerized under the influence of initiators to form PVC resin. After polymerization, the PVC resin is separated, washed to remove unreacted VCM and other substances, dried, and then can be further processed into various products by adding stabilizers, plasticizers, and other additives to give it desired properties. This industrial process is tightly regulated to manage environmental and health concerns, particularly regarding the handling of VCM, which is a carcinogen.
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