Question

What is the monomer of melamine?

Answer 1

Melamine formaldehyde is one of the hardest and stiffest thermosetting polymers, which provides good properties and performance. Melamine resin or melamine formaldehyde also shortened to melamine is a resin with melamine rings terminated with multiple hydroxyl groups derived from formaldehyde.

Complete answer:
Common monomer of melamine is formaldehyde.
Melamine formaldehyde is made from the polymerization of formaldehyde with melamine. Polymerization is the chemical process in which two or more identical small molecules called monomers are linked to form a chain of polymers.
The process Involves mixing a solution of melamine, formaldehyde and an alkali metal sulfate for a suitable period of time to cause initial condensation of the melamine and formaldehyde, and mixing the solution cause further condensation until the desired degree of polymerization is achieved
Furniture made with Melamine contains an abundance of formaldehyde which off-gasses into the environment. That is changing however, and there are some suppliers using formaldehyde-free Melamine, especially in California, but it is still rare.

Note:
Melamine is a versatile material and it also resists fire. So it is used for making kitchenware. Because melamine is basically a thermosetting plastic which does not melt by fire. Once it is being molded it cannot be melted again. The concern regarding melamine is that a person may experience melamine poisoning from leakage into foods. If a person were to consume high melamine levels, they could be at risk for kidney problems, including kidney stones or kidney failure.