(a) Elastomers:- The polymers that have elastic character like rubber are called elastomers. Ex. Natural rubber
(b) Fibers:- They have strong intermolecular forces between the chains. These forces are either H-bonding or dipole interactions. Ex. Nylon-66, dacron, silk etc.
(c) Thermoplastics :- These are the polymers which can be easily softened repeatedly heated and hardened when cooled with little change in their properties. Ex. Polythene, PVC.
(d) Thermositting Polymers :- These are the polymers which undergo permanent change on heating. They become hard and infusible on heating. Ex. Bakelite. Etc.