Buna -`S` rubber `(SBR)` is a copolymer of

Options

A. buta - 1,3- diene and styrene
B. beta -1,3-diene and isoprene
C. beta-1,3-diene and chloroprene
D. beta-1,3-diene and acrylonitrile

Answer

A

Explanation

A copolymer is a polymer consisting of two or more different monomer units. Styrene-butaidiene rubber `(SBR)` is an important synthetic rubber. It is a copolymer made from about 25% styrene and 75% buta - 1,3- diene. Its approximate structure is
Buty rubber, which is useful in making automobile inner tubes and tyre lines, is prepared by the polymerization of isobutylene and isoprene
Buta -N rubber is a copolymer of buta-1,3-diene and acrylontirile
Neoprene, a sythetic rubber and a hompolymer of chloroprene, resembles natural rubber which contains isoprene unit.