PMMA, polymethyl-methacrylate, is a thermoplastic acrylic linear polymer, the mer of which is illustrated in the diagram. PMMA is transparent, with a refractive index of 1.49, and easily formed into ...

Acrylic (PMMA) Hard, brittle ... toy bricks and casings of products such as drills Thermoplastic elastomer (TPE) Properties of natural rubber but processed like other plastics, flexible and ...