Question

Which of the following polymers contain ester linkage?

• A. PHBV
• B. Orlon
• C. Neoprene
• D. Buna–S

Hint:

Biodegradable polymers like PHBV and PET are polyesters and always contain ester linkages.

Answer 1

The Correct Option is A

Step 1: Recall the definition of ester linkage.
An ester linkage has the functional group –COO– and is commonly found in polyesters formed by condensation of hydroxy acids.
Step 2: Analyze each polymer.
(A) PHBV: Poly(β-hydroxybutyrate-co-β-hydroxyvalerate) is a biodegradable polyester containing ester (–COO–) linkages — correct.
(B) Orlon: It is polyacrylonitrile and contains –C≡N groups, not ester linkages.
(C) Neoprene: It is polychloroprene and contains C–C and C–Cl bonds.
(D) Buna–S: It is a copolymer of butadiene and styrene with C–C bonds.
Step 3: Conclusion.
Only PHBV contains ester linkage among the given polymers.