Polymers are macromolecules made of many rehashing subunits called monomers. These monomers are synchronized by covalent bonds where atoms share electrons being a strong union. The procedure to transport a polymer is known as polymerization reaction. Thermoplastic polymers are actually significant in Additive Manufacturing. Thermoplastics are polymers which reduce when they are warmed and harden as they cool. These polymers are used for plastic 3D prints, importantly Selective Laser Sintering (SLS). There are a few prominent thermoplastics that can be used with this procedure, carrying a variety of results depending on their base properties.