The synthetic elastomer known as Butyl rubber is formed primarily from which monomer, and what secon — Polymers Chemistry Question

💡 Solution & Explanation

Butyl rubber is a copolymer consisting of approximately $98\%$ isobutylene and $2\%$ isoprene. Isobutylene forms the saturated backbone providing chemical inertness, while the trace isoprene units provide the isolated double bonds necessary for sulphur vulcanization.