Condensation polymerisation generally involves a repetitive condensation reaction between two bi-functional or trifunctional monomeric units. These polycondensation reactions may result in the loss of some simple molecules as water, alcohol, hydrogen chloride, etc., and lead to the formation of high molecular mass condensation polymers. In these reactions, the product of each step is again a bi-functional species and the sequence of condensation goes on. Since, each step produces a distinct functionalised species and is independent of each other, this process is also called as step growth polymerisation.

What is the structure of melamine?

Melamine is an organic compound with the chemical formula \( \text{C}_3\text{H}_6\text{N}_6 \). It consists of a triazine ring, which is a heterocyclic ring composed of three carbon atoms and three nitrogen atoms. Each carbon atom in the triazine ring is bonded to one amino group \((–NH_2)\). Here is the chemical structure of melamine:

Key Features:

Triazine Ring: The central structure of melamine is the 1,3,5-triazine ring, which is a six-membered ring consisting of alternating carbon and nitrogen atoms.

Amino Groups: Each of the three carbon atoms in the triazine ring is bonded to an amino group (–NH2), making melamine a triamine derivative of the triazine ring.

Melamine has a planar structure with a 1,3,5-triazine ring and three amino groups attached to the carbon atoms. This structure contributes to its properties and applications, such as forming strong bonds in melamine-formaldehyde resins used in various products.