What is the monomer unit of natural rubber (polyisoprene)?
Answer and explanation
Correct answer: B. Isoprene (2-Methylbuta-1,3-diene)
- Step 1: Natural rubber is a polymer extracted from latex trees composed of cis-1,4-polyisoprene. Step 2. Its monomer is isoprene, systematically named 2-methylbuta-1,3-diene. Answer: Isoprene (2-Methylbuta-1,3-diene). Why not the others: Chloroprene is the monomer of neoprene synthetic rubber; 1,3-butadiene is used in Buna rubbers; styrene is used in polystyrene and SBR.
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