The structures of three monomers are shown. In each case, show the structure of the polymer that would result from polymerization of the monomer. Vinyl chloride is polymerized to ‘’vinyl’’ plastics and PVC pipe. Tetrafluoroethylene polymerizes to Teflon, used as non-stick coatings and PTFE valves and gaskets. Acrylonitrile is polymerized to Orlon, used in sweaters and carpets.

Vinyl chloride tetrafluoroethylene acrylonitrile

Addition polymerisation is a reaction in which the reaction of monomers leads to formation of polymer without any by-product formation. In free-radical polymerization, addition of a monomer occurs to an active chain-end and gets regenerated. Initiation, propagation, and termination are the basic three steps of the free-radical polymerisation reaction.

Vinyl chloride undergoes addition polymerisation reaction to produce polyvinylchloride polymer. PVC is used in drainage pipes, cable and wire insulations etc.

Tetrafluoroethylene undergoes free radical vinyl polymerisation reaction to produce polytetrafluoroethylene polymer or Teflon. PTFE is used to make gaskets because of its heat resistance and strength.

Polyacrylonitrile or Orlon is a synthetic resin prepared by free radical vinyl polymerisation of acrylonitrile monomer. PAN is used to make carbon fibre and fibres of PAN have also been used in sails of yachts.