Identify a polymer obtained from β -hydroxybutyric acid and β -hydroxyvaleric acid.

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The polymer obtained from the copolymerization of 3-hydroxybutanoic acid ( $β$ -hydroxybutyric acid) and 3-hydroxypentanoic acid ( $β$ -hydroxyvaleric acid) is Poly $β$ -hydroxybutyrate-co- $β$ -hydroxyvalerate, commonly known as PHBV.

PHBV is a biodegradable aliphatic polyester.

Nylon 2-nylon 6 is a copolymer of glycine and aminocaproic acid.

Buna-N is a copolymer of 1,3-butadiene and acrylonitrile.

Thermocol is a commercial name for polystyrene.

Answer: PHBV

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