Synthetic rubber may be defined as any vulcanisable rubber like polymer which is capable of getting stretched to twice its length. However, it returns to its original size and shape when the stretching force is withdrawn.
(i) Neoprene

(ii) Buna-N (Butadiene-acrylonitrile copolymer)

(iii) Buna-S (Butadiene-styrene copolymer)
