Question

Which one of the following is NOT a copolymer?

• A. Buna-S
• B. Neoprene
• C. PHBV
• D. Butadiene-styrene

Answer 1

The Correct Option is B

To determine which of the given options is not a copolymer, we need to understand what a copolymer is. A copolymer is a polymer derived from more than one species of monomer. In the given options, we have:

1. Buna-S: This is a copolymer made from butadiene and styrene. It is widely used in the production of synthetic rubber.
2. Neoprene: This is a polymer, but not a copolymer. Neoprene is made from the monomer chloroprene. It is not derived from more than one species of monomer, hence it is a homopolymer.
3. PHBV: Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) is a copolymer derived from two different monomers: 3-hydroxybutyric acid and 3-hydroxyvaleric acid.
4. Butadiene-styrene: This is another name for Buna-S, which confirms it's a copolymer of butadiene and styrene.

From the analysis above, Neoprene is not a copolymer as it is synthesized from only one type of monomer, chloroprene. Therefore, the correct answer is Neoprene.