Indian Forest Service (Mains), Chemistry optional · 2021 · Paper II
Q6(e). Acid equivalent of nylon-6,6
Question
Calculate the acid equivalent of nylon-6,6 with average degree of polymerization 440.
Answer in brief
Assuming one COOH and one NH₂ end per linear chain and 440 complete repeat units, the acid equivalent is 99458 g eq⁻¹.
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Coversnylon-6,6end-group analysisacid equivalentdegree of polymerizationnumber-average molar mass
All parts of Question 6
- 6(a)(i) Malonic ester ring synthesis5 marks
- 6(a)(ii) Wittig olefination5 marks
- 6(b)(i) Tertiary protein structure5 marks
- 6(b)(ii) End-group content of polystyrene5 marks
- 6(c)(i) Cyclization of a beta-hydroxy phenethylamide5 marks
- 6(c)(ii) Terylene from p-xylene5 marks
- 6(d) Fischer indole synthesis5 marks
- 6(e) Acid equivalent of nylon-6,65 marks