Answer:
Linear Polymers
These polymers are formed of long straight chains. Eg: HDP, Polyvinyl Chloride
Branched Chain Polymers
They are basically linear polymers with some branches. Eg: LDP, amylopectin
Cross Linked or Network Polymers
These polymers have may cross linking bonds that give rise to network like structure.These polymers contain Bi-Functional and tri-Functional monomers.