what is melamine?? State it's properties.
Answers
Explanation:
Melamine. Melamine, also called cyanuramide or triaminotriazine, a colourless crystalline substance belonging to the family of heterocyclic organic compounds, which are used principally as a starting material for the manufacture of synthetic resins. Melamine is rich in nitrogen, a property that is similar to protein.
Answer:
PROPERTIES
Melamine formaldehyde (also called melamine or MF) is a hard, very durable, and versatile thermosetting aminoplast1 with good fire and heat resistance. It is made from melamine and formaldehyde by condensation of the two monomers. Its good fire retardant properties are due to the release of nitrogen gas when burned or charred.
MF resins are quite similar to urea-formaldehyde (UF) resins and are fully compatible with them and, therefore, are often co-reacted with them to reduce formaldehyde emissions from particleboards and to prevent degradation of glue bonds caused by hydrolytic degradation of the UF polymers. The resin blend is called melamine–urea–formaldehyde (MUF). Compared to natural woods or wood veneers, melamine composite boards and overlay materials have improved heat, moisture, scratch, and chemicals resistance.
Melamine can also be converted to foam structures with a distinctive pore structure, which is extremely hard. It can be used as an insulating and soundproofing material and more recently as a cleaning abrasive.
MF resins compete in many applications with urea-formaldehyde (UF) and phenolic resins (phenoplasts). In general, MF resins are harder and stronger than phenolics but have lower moisture and heat resistance. Unlike phenolics, they are clear and colorless. Thus, MF resin can be molded into products of light color. Compared to UF resins, MF resins have somwhat better properties including better moisture and heat resistance, but they are also more expensive.