Polioximentilén

Polioximentilén, often abbreviated as POM, is a type of engineering thermoplastic known for its high stiffness, low friction, and excellent wear resistance. It is a linear polymer characterized by the presence of repeating oxymethylene groups (-CH2-O-) in its molecular chain. POM can be produced in two main forms: homopolymers and copolymers. Homopolymers, typically made through the cationic polymerization of formaldehyde, tend to be more crystalline and possess slightly higher mechanical strength. Copolymers, derived from the polymerization of trioxane with a small amount of a comonomer like ethylene oxide, offer improved thermal and chemical resistance.

The properties of POM make it suitable for a wide range of applications where precision and durability are critical. Its low coefficient of friction and good wear resistance are advantageous for components in moving parts, such as gears, bearings, and conveyor systems. The material's inherent lubricity also contributes to its use in slide elements and rollers. Furthermore, POM exhibits good dimensional stability, meaning it retains its shape under varying temperatures and humidity conditions. It is also resistant to many solvents and oils, making it a reliable choice for parts exposed to chemical environments. Its ease of processing through injection molding and extrusion allows for the cost-effective production of complex shapes.