In the synthesis of Nylon-6,6 from hexamethylenediamine and adipic acid, what is the primary byproduct and what is the nature of the polymerization process?

A. Water is the byproduct and it is a step-growth polymerization. — Nylon-6,6 is formed via the condensation of a diamine and a dicarboxylic acid, releasing water as a byproduct.

B. Hydrogen gas is the byproduct and it is a chain-growth polymerization.

C. Methanol is the byproduct and it is a step-growth polymerization.

D. Water is the byproduct and it is a chain-growth polymerization.

JEE Main · ChemistryHard

$In the synthesis of Nylon-6,6 from H_{2} N (CH_{2})_{6} NH_{2} and HOOC (CH_{2})_{4} COOH, what is the primary byproduct and what is the nature of the polymerization process?$

A. $Water is the byproduct and it is a step-growth polymerization.$
B. $Hydrogen gas is the byproduct and it is a chain-growth polymerization.$
C. $Methanol is the byproduct and it is a step-growth polymerization.$
D. $Water is the byproduct and it is a chain-growth polymerization.$

Show correct answer & step-by-step solution

Correct answer: A — $Water is the byproduct and it is a step-growth polymerization.$

Solution

$The reaction is n H_{2} N (CH_{2})_{6} NH_{2} + n HOOC (CH_{2})_{4} COOH \to [NH (CH_{2})_{6} NHCO (CH_{2})_{4} CO]_{n} + 2 n H_{2} O .$
$The reaction involves the formation of amide linkages with the elimination of small molecules.$
$This mechanism is characteristic of step-growth polymerization.$
$The byproduct is water.$
$Hence the answer is (A).$

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In the synthesis of Nylon-6,6 from H2​N(CH2​)6​NH2​ and HOOC(CH2​)4​COOH, what is the primary byproduct and what is the nature of the polymerization process?

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$In the synthesis of Nylon-6,6 from H_{2} N (CH_{2})_{6} NH_{2} and HOOC (CH_{2})_{4} COOH, what is the primary byproduct and what is the nature of the polymerization process?$