Polymerization of vinyl chloride, CH =CHCl (chloroethene), produces a polymer similar to 2
polyethylene, but having chlorine atoms at alternate carbon atoms on the chain. Polyvinyl chloride (PVC)
is rigid and somewhat brittle. About two-thirds of the PVC produced annually is used in the manufacture
of pipe. It is also used in the production of “vinyl” siding for houses and clear plastic bottles. When it is
blended with a plasticizer such as a phthalate ester, PVC becomes pliable and is used to form flexible articles such
as raincoats and shower curtains.