Thermosets vs Thermoplastics

Thermoset polymers outperform other materials (such as thermoplastics) in a number of areas, including mechanical properties, chemical resistance, thermal stability, and overall durability.  For thermoplastics, as it cools, the thermoplastic will harden in the shape of the mold, but there is no chemical change. Thermoset molecules cross-link in the curing stage to form a 3-d network of bonds. The cross-linking  process forms a molecule with a larger molecular weight, resulting in a material with a higher melting point. Thermoset curing has a chemical reaction that cannot be undone and thus making it a stronger part that is suitable in almost any environment.