In nylon-66, the initial and subsequent numerical values (both 6) denote the carbon atom counts present in the_________________?
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Answer: B. Hexamethylene diamine and the adipic acid
Explanation
In nylon-66, the two numbers 6 and 6 represent the number of carbon atoms in the diamine and the dicarboxylic acid, respectively. Hexamethylene diamine provides the first six carbon atoms, while adipic acid supplies the remaining six carbon atoms. The correct option accurately explains that both numerical designations denote carbon counts in the diamine and adipic acid. Nylon-66 is a prominent synthetic polyamide produced by condensing hexamethylene diamine with adipic acid. Each reactant molecule contributes exactly six carbon atoms to the resulting polymer repeat unit structure. This balanced stoichiometry ensures proper molecular weight buildup during step-growth polymerization manufacturing.
Option A is incorrect because adipic acid is a linear dicarboxylic acid, not a ring structure. Option C is wrong because hexamethylene diamine is a linear diamine rather than a cyclic ring compound. Option D is false because the correct option identifying diamine and adipic acid is explicitly provided.
- Subject
- Engineering
- Category
- Chemical Engineering
- Topic
- —
- Difficulty
- medium
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