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Latest revision Your text
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| style="background-color: white !important; color: black !important;" | [[File:Vinyl chloride Polymerization V1.svg|400px|The polymerisation of vinyl chloride]]

| style="background-color: white !important; color: black !important;" | [[File:Vinyl chloride Polymerization V1.svg|400px|The polymerisation of vinyl chloride]]

|}

|}

About 80% of production involves [[suspension polymerization]]. [[Emulsion polymerization]] accounts for about 12%, and [[bulk polymerization]] accounts for 8%. Suspension polymerization produces particles with average diameters of 100–180&nbsp;μm, whereas emulsion polymerization gives much smaller particles of average size around 0.2&nbsp;μm. VCM and water are introduced into the reactor along with a polymerization initiator and other additives. The contents of the reaction vessel are pressurized and continually mixed to maintain the suspension and ensure a uniform particle size of the PVC resin. The reaction is [[exothermic]] and thus requires cooling. As the volume is reduced during the reaction (PVC is denser than VCM), water is continually added to the mixture to maintain the suspension.<ref name=ullmannPVC>{{Ullmann |first=M. W.|last=Allsopp|first2=G.|last2=Vianello|title=Poly(Vinyl Chloride)|year=2012|doi=10.1002/14356007.a21_717}}</ref>

About 80% of production involves [[suspension polymerization]]. [[Emulsion polymerization]] accounts for about 12%, and [[bulk polymerization]] accounts for 8%. Suspension polymerization affords particles with average diameters of 100–180&nbsp;μm, whereas emulsion polymerization gives much smaller particles of average size around 0.2&nbsp;μm. VCM and water are introduced into the reactor along with a polymerization initiator and other additives. The contents of the reaction vessel are pressurized and continually mixed to maintain the suspension and ensure a uniform particle size of the PVC resin. The reaction is [[exothermic]] and thus requires cooling. As the volume is reduced during the reaction (PVC is denser than VCM), water is continually added to the mixture to maintain the suspension.<ref name=ullmannPVC>{{Ullmann |first=M. W.|last=Allsopp|first2=G.|last2=Vianello|title=Poly(Vinyl Chloride)|year=2012|doi=10.1002/14356007.a21_717}}</ref>



PVC may be manufactured from [[ethylene]], which can be produced from either [[naphtha]] or [[ethane]] feedstock.<ref name="Nikkei Asian Review">{{cite web|url=https://asia.nikkei.com/Business/Companies/Shin-Etsu-Chemical-to-build-1.4bn-polyvinyl-chloride-plant-in-US|title=Shin-Etsu Chemical to build $1.4bn polyvinyl chloride plant in US|website=Nikkei Asian Review|language=en-GB|access-date=24 July 2018|archive-date=24 July 2018|archive-url=https://web.archive.org/web/20180724123305/https://asia.nikkei.com/Business/Companies/Shin-Etsu-Chemical-to-build-1.4bn-polyvinyl-chloride-plant-in-US|url-status=live}}</ref>

PVC may be manufactured from [[ethylene]], which can be produced from either [[naphtha]] or [[ethane]] feedstock.<ref name="Nikkei Asian Review">{{cite web|url=https://asia.nikkei.com/Business/Companies/Shin-Etsu-Chemical-to-build-1.4bn-polyvinyl-chloride-plant-in-US|title=Shin-Etsu Chemical to build $1.4bn polyvinyl chloride plant in US|website=Nikkei Asian Review|language=en-GB|access-date=24 July 2018|archive-date=24 July 2018|archive-url=https://web.archive.org/web/20180724123305/https://asia.nikkei.com/Business/Companies/Shin-Etsu-Chemical-to-build-1.4bn-polyvinyl-chloride-plant-in-US|url-status=live}}</ref>

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