Elastomers are a class of polymers known for their elasticity. They consist of long-chain molecules with occasional cross-linking, which allows them to stretch under stress and return to their original shape when the stress is released.
This rubber-like behavior is a distinctive property of elastomers and is not observed in other polymer classes like plastics, fibres, or thermosets.
Examples of elastomers include natural rubber and synthetic rubbers like neoprene and silicone rubber.