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29 X 36 sized plexiglass painting   Plexiglass, what is it? Also known as acrylic, acrylic glass, or more scientifically, poly(methyl methacrylate) (PMMA), plexiglass is a transparent petroleum-based thermoplastic typically manufactured in sheets. It is a strong, tough, and lightweight material, with a higher impact strength than glass. It is also useful for outdoor applications due to a higher environmental stability than most other plastics, such as polystyrene and polyethylene. These advantages, combined with other properties including high service life, effective light transmission, and simple processing, make plexiglass a highly useful invention. However, plexiglass products rarely use pure PMMA, instead modifying the material to optimize its properties even further. Such modifications include adding butyl acrylate to improve impact strength, adding methacrylic acid to allow for higher temperature uses, adding dyes to give color for decorative applications, and many more. Plexigl