How are polymers classified on the basis of structure ?

Answer

On the basis of structure, the polymers are classified as follows :
(i) Linear polymers such as high density polythene (HDP), polyvinyl Woride, nylons, polyester, etc.
(ii) Branched polymers such as low density polythene (LDP), amylopectin, glycogen, etc.
(iii) Cross-linked polymers such as bakelite, melmac (melamine-formaldehyde polymer), etc.
For details refer to sec `15.5.2` pages `15//3-15//4`.