Question

Write the classification of polymers on the basis of intermolecular forces.

Answer 1

1. Elastomers: Elastomers, the elastic polymers, have weak van der Waals type of intermolecular forces.
   e.g. Buna - S, Vulcanized rubber.
2. Fibres: Polymeric solids which form threads are called fibres. The fibres possess high tensile strength. They have strong intermolecular forces.
   e.g. Terylene, Keratin, Nylon 6, 6.
3. Thermoplastic polymers: polymers are capable of repeated softening on heating and hardening on cooling.
   e.g. Polythene, Polystyrene.
4. Thermosetting polymers: They cannot be softened or remoulded on heating once they are moulded.
   e.g. Bakelite.