(a) Thermoplastic polymers: Linear polymers in which the intermolecular forces of attraction are in between those of elastomers and fibres and can be melted again and again on heating followed by moulding to give desired shape.
Example: Polyethene, Polyvinyl chloride (PVC) etc.
Thermosetting polymers: These are semifluid substances with low molecular masses which when heated in a mould underoes change in chemical composition to give a hard, infusible and insoluble mass. These cannot be remelted.
Example: Bakelite, Melamine etc.
(b) Teflon is used for making non-stick cooking utensils.
