Acrylic (PMMA) (Polymethyl methacrylate)
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.
Applications: Automotive Transparent Items such as Head/Tail Lenses and Trim, Household Light Fixtures and Decorative Items, Safety Equipment and Shields.
Brand Names: LG PMMA, Plexiglas, PermaStat, Acrylite
| Tensile Strength | Flexural Modulus | Impact Strength | Max Temp. | Chemical Resistance |
|---|---|---|---|---|
| 2800-10,9000 psi | 221,000-534,000 psi | .22-1.1 ft-lb/in notched izod | 183°-217° F | Excellent |
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 moistures
Continuous service temp. (melts easily)
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