(a) Linear polymer :- These are polymers in which monomeric units are linked together to form linear chains. Eg. Polythene, PVC, Teflon
(b) Cross linked polymers:- These are polymers in which the monomers unites are crosslinked together to form a three- dimensional network. Ex. Bakelite, Synthetic rubber.
(c) Branch chain polymers:- The polymers in which monomers are joined to form long chains with side chains. Ex. Low density polythene.