Question

Melamine polymer is formed by the condensation of :

• A.
• B.
• C.
• D.

Answer 1

The Correct Option is A

To understand how melamine polymer is formed, let's delve into the process and components involved in this condensation reaction.

Melamine is a trimer of cyanamide with a 1,3,5-triazine skeleton. It is used in the production of melamine-formaldehyde polymer, commonly known as melamine resin, which is a type of thermosetting plastic. The formation of melamine polymer involves the condensation polymerization of melamine with formaldehyde.

Let's break down the solution step-by-step:

1. Understanding Condensation Polymerization: Melamine polymerization is a form of condensation polymerization. In such reactions, monomers join together with the loss of small molecules like water or methanol.
2. Reactants Required: The question asks for the reactants that condense to form melamine polymer. We know from chemical studies that this involves the reaction of melamine (a nitrogen-rich heterocyclic amine) with formaldehyde (a simple aldehyde).
3. Formation Process:
   • Melamine reacts with formaldehyde in a series of steps to form first, dimethylolmelamine, and further reacts to form the polymer.
   • The key structural unit involves the triazine rings linked by methylene (-CH₂- groups) and associated with ether cross-links.
4. Correct Option Identification:

   Given the options, the correct answer option involves melamine and is represented as:

   

5. Conclusion: The polymerization process illustrates the reaction between melamine and formaldehyde, which leads to the production of a versatile polymer commonly used in coatings, molding compounds, and laminates, primarily due to its high thermal stability and resistance to moisture and chemicals.

In summary, the correct answer indicates the key component, melamine, reacting with formaldehyde in a condensation polymerization forming a robust polymer commonly used in household items like dinnerware and countertops.