Identify ureaformaldehyde resin from following polymers?

Question

TestHub · Accepted Answer

Urea-formaldehyde resin is a condensation polymer formed by the reaction between urea ( $N H_{2} - CO - N H_{2}$ ) and formaldehyde ( $H C H O$ ).

The initial reaction involves the formation of methylol urea derivatives, which then undergo condensation with the elimination of water molecules to form a cross-linked polymer network.

The repeating unit of the urea-formaldehyde polymer chain is derived from linking the nitrogen atoms of urea with the methylene ( $- C H_{2} -$ ) group from formaldehyde.

The repeating unit is $[- N H - CO - N H - C H_{2} -]_{n}$ .

Let us analyze the other options:
Option (1) is polyacrylamide.
Option (2) is polystyrene.
Option (4) is nylon-6, which is polycaprolactam.

Chemistry - Polymer Question with Solution | TestHub

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