What are the two monomeric building blocks used in the industrial condensation polymerization to manufacture Nylon-6,6?
Answer and explanation
Correct answer: B. Hexamethylenediamine and adipic acid
- Step 1: Nylon-6,6 is a synthetic polyamide named for the number of carbon atoms in each of its two monomer units.
- Step 2: The diamine monomer is hexamethylenediamine (), which contains 6 carbon atoms.
- Step 3: The dicarboxylic acid monomer is adipic acid (hexanedioic acid, ), which also contains 6 carbon atoms. Condensation of the two with loss of water molecules yields Nylon-6,6.
Answer
Hexamethylenediamine and adipic acid.
Why not the others: Caprolactam is the monomer for Nylon-6; Terephthalic acid and ethylene glycol produce Dacron (Terylene); Phenol and formaldehyde produce Bakelite.
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