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Which of the following is an example of polyester ? - (1) Butadiene-styrene copolymer (2) Melamine polymer (3) Neoprene (4) Poly-β-hydroxybutyrate-co-β-hydroxy valerate

1. Butadiene-styrene copolymer
2. Melamine polymer
3. Neoprene
4. Poly-β-hydroxybutyrate-co-β-hydroxy valerate

Correct answer: Poly-β-hydroxybutyrate-co-β-hydroxy valerate

Solution

Poly-β-hydroxybutyrate-co-β-hydroxy valerate is a type of polyester because it is formed through the polymerization of hydroxy acids, which contain ester linkages characteristic of polyester materials.

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