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Which one of the following is NOT a copolymer?

1. Buna-S
2. Neoprene
3. PHBV
4. Butadiene-styrene

Correct answer: Neoprene

Solution

Neoprene is a homopolymer made from chloroprene, whereas the other options are copolymers formed from two different monomers. This distinction makes Neoprene the only option that does not fit the definition of a copolymer.

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