In the industrial manufacturing of Nylon 6,6, which two bifunctional organic monomers undergo step-growth condensation polymerization?
Answer and explanation
Correct answer: C. Adipic acid (hexanedioic acid) and hexamethylenediamine (1,6-diaminohexane)
- Step 1: Nylon 6,6 is a polyamide synthesized by condensation of a 6-carbon dicarboxylic acid and a 6-carbon diamine. Step 2. Adipic acid (HOOC-(CH2)4-COOH) and hexamethylenediamine (H2N-(CH2)6-NH2) react with elimination of water molecules to form recurring amide linkages. Answer: Adipic acid (hexanedioic acid) and hexamethylenediamine (1,6-diaminohexane). Why not the others: Terephthalic acid and ethylene glycol produce Dacron (PET polyester); caprolactam polymerizes into Nylon 6.
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