Chemistry - Polymer Question with Solution | TestHub

Natural rubber is a linear polymer of isoprene (2-methyl-1,3-butadiene) and is also called cis-1,4-polyisoprene. It is formed by the addition polymerization of isoprene units.

The cis-configuration at each double bond does not allow the polymer chains to come close to each other for effective intermolecular attractions, which gives it elastic properties.

Styrene-butadiene rubber (SBR or Buna-S) is a synthetic rubber that contains 1,3-butadiene and styrene as monomer units, not natural rubber.

Therefore, the statement that it contains butadiene and styrene as monomer units is incorrect.

Answer: It contains butadine and styrene as monomer units.