Process

Most commercial grades of PMMA are polymerized by Free Radical Polymerization, yielding Atactic Polymers whereas Anionic Polymerization yields Syndiotactic or Isotactic Polymers. Most commercial grades of PMMA, however, are Atactic with a Glass Transition (Tg) temperature of 398 °K (125 °C). Commercial PMMA is often copolymerized with Comonomers other than Methyl Methacrylate. The Tg of these products can vary, ranging broadly from approximately 360 °K to 430 °K (87 °C to 157 °C).