(i) Polythene is the polymer formed by the addition polymerization of ethene. There are two types of polythenes namely- High density polythene(HDP) and Low density polythene(LDP).

Structure of monomer – Ethene.

(ii) When multiple molecules of vinyl chloride ( is heated in an inert solvent in the presence of dibenzoyl peroxide then PVC is obtained.

Structure of monomer – Vinyl chloride.

(iii) Teflon is prepared by the polymerization of Tetrafluoroethene(PTFE) molecules. It is done so by heating PTFE molecules under high pressure and in presence of ammonium peroxo sulphate [(

Tetrafluoroethene Teflon

Structure of monomer – Tetrafloroethene