When condensation product of hexamethylenediamine and adipic acid is heated to 353 K (80 ,^ C) in an atmosphere of nitrogen for about 4-5 h, the product obtained is

JEE Main Chemistry question

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When condensation product of hexamethylenediamine and adipic acid is heated to 353 K () in an atmosphere of nitrogen for about 4-5 h, the product obtained is

(A)Solid polymer of nylon 66
(B)Liquid polymer of nylon 66Correct
(C)Gaseous polymer of nylon 66
(D)Monomeric hexamethylenediamine

Answer: (B)

Solution

The nylon salt (from hexamethylenediamine and adipic acid) is first heated at a relatively low temperature (around 350 K) under nitrogen for several hours using the interfacial/melt technique; at this stage, only partial condensation has occurred and the product obtained is a viscous liquid pre-polymer of nylon-66,

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Question ID VK-151369