Question:medium

Identify the monomers for Nylon-6,6.

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In Nylon-6,6, the first number represents the number of carbons in the diamine, and the second number represents the number of carbons in the dicarboxylic acid.
Updated On: Apr 29, 2026
  • Adipic acid and Hexamethylenediamine
  • Ethylene glycol and Terephthalic acid
  • Styrene
  • Caprolactam
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The Correct Option is A

Solution and Explanation

Step 1: Understanding the Question:
The question asks to identify the building blocks (monomers) used to synthesize the synthetic polymer Nylon-6,6.
Step 2: Detailed Solution:
Nylon-6,6 is a type of polyamide formed through a step-growth condensation polymerization process.
The reaction involves two distinct monomer units combining, releasing water molecules as a byproduct.
The "6,6" in its name signifies that each of the two reacting monomers possesses exactly six carbon atoms in their molecular structures.
Let's look at the correct monomers:
1. The diamine monomer is Hexamethylenediamine: \(H_2N-(CH_2)_6-NH_2\) (contains \(6\) carbon atoms).
2. The dicarboxylic acid monomer is Adipic acid: \(HOOC-(CH_2)_4-COOH\) (contains \(4+2 = 6\) carbon atoms).
When they react, the amine groups and carboxylic acid groups form strong amide linkages (\(-CONH-\)).
Let's briefly rule out the other options:
Ethylene glycol and Terephthalic acid form Dacron (PET).
Styrene forms Polystyrene.
Caprolactam is the single monomer used to make Nylon-6.
Step 3: Final Answer:
The correct monomers are Adipic acid and Hexamethylenediamine.
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