Poly(phenyl methacrylate)

Poly(phenyl methacrylate) is an aromatic methacrylate polymer, a rigid thermoplastic characterized by a phenyl substituent on the methacrylate backbone that imparts high stiffness and thermal stability. It finds use in applications requiring excellent optical clarity and dimensional stability, particularly in precision optical components, protective coatings, and specialty engineering plastics where moderate-to-high glass transition temperature provides better performance at elevated temperatures compared to standard acrylic polymers. Its aromatic structure makes it notably stiffer and more heat-resistant than conventional polymethyl methacrylate (PMMA), though it is less commonly encountered in high-volume production than commodity acrylic materials.