poly(methyl methacrylate)

Poly(methyl methacrylate), commonly known as PMMA or acrylic, is a transparent thermoplastic polymer valued for its optical clarity, ease of processing, and good surface hardness. It is widely used in applications requiring light transmission combined with structural rigidity, including aircraft windows, automotive lighting, medical devices, and architectural glazing, where it often replaces glass due to its lighter weight, impact resistance, and lower cost. Engineers select PMMA when transparency, dimensional stability, and moderate temperature performance are critical, though its relatively low modulus and creep behavior at elevated temperatures limit use in high-stress or high-heat applications.