What are the classes of the polymer based on molecular forces ?

Explanation

On the basis of molucular forces polymers are classified into four types .
1) Elastomers: These are rubber like solids with elastic properties. E.g.: Buna -S,Buna -N.
2) Fibres : Fibres are the thread forming solids which possess high tensile strength.
E.g.Nylon 6,6, polyesters
3) Thermoplastic Polymers: These are the linear (or) slightly branched long chain molecules capable of softening on heating and hardening on cooling .E.g.: polystyrene,polythene.
4) Thermo setting polymers : These polymers are cross linked (or) heavily branched molecules which on heating undergo extensive cross linking in moulds and again become infusible. E.g. : Bakelite ,urea-formaldehyde resin etc....