Materials

Acrylic (PMMA)

Acrylic (PMMA) is a tough, highly transparent material with excellent resistance to ultraviolet radiation and weathering. It can be colored, molded, cut, drilled, and formed. Acrylic is an economical alternative to polycarbonate (PC) when extreme strength is not necessary. It is often preferred because of its moderate properties, easy handling and processing, and low cost, but behaves in a brittle manner when loaded, especially under an impact force.

LG PMMAPlexiglasPermaStatAcrylite

Typical Properties

Tensile Strength2,800-10,900 psi
Flexural Modulus221,000-534,000 psi
Impact Strength.22-1.1 ft-lb/in notched izod
Max Temperature183°-217° F
Chemical ResistancePoor to Fair

Applications

  • Automotive transparent items such as head/tail lenses and trim
  • Household light fixtures and decorative items
  • Safety equipment and shields

Advantages

  • + Excellent optical clarity
  • + Excellent weatherability and resistance to sunlight
  • + Rigid with good impact resistance
  • + Good light transmission

Disadvantages

  • − Poor solvent resistance
  • − Subject to stress cracking
  • − Slightly absorbs moisture
  • − Continuous service temperature (melts easily)
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