Plexiglass sheets Plexiglass sheets Plexiglass sheets
PMMA / Acrylic / Plexiglass Sheets
When it comes to Plexiglass sheets, they may not withstand shock loads as robustly as materials like polycarbonate, and their thermal resistance is notably lower. However, Plexiglas / PMMA (plates) come at a more affordable price compared to solid polycarbonate. In contrast to silicate glass, Plexiglass sheets are 2.5 times lighter and boast 5 times higher impact resistance. PMMA sheets excel in light and UV radiation transmission, surpassing not only ordinary glass but also other transparent plastics in terms of transparency.
UV-Stability Thanks to its inherent stability to UV-light, PMMA sheets find application in various outdoor settings, retaining their original color and finishes over many years. Plexiglass sheets can deflect up to 70% of UV radiation, a feat not achievable by regular glass.
Surface Hardness PMMA sheets offer impressive scratch resistance and can be machined to achieve a highly glossy finish. These features, coupled with PMMA’s dimensional stability, make it suitable for a range of applications where long-lasting, beautiful appearances matter, such as in furniture, kitchen and bath walls, or cabinet facades.
Unique Properties for Specific Performance PMMA can undergo further modification by incorporating various additives. These additives aim to enhance specific properties of the polymer, tailored to particular applications. Examples of adjustable properties include impact resistance, chemical resistance, flame retardancy, light diffusion, UV light filtering, or optical effects.
Mechanical Properties
| Elongation at break ( % ) | 2.5-4 | ||
| Hardness – Rockwell | M92-100 | ||
| Izod impact strength ( J m–1 ) | 16-32 | ||
| Poisson’s ratio | 0.35 – 0.4 | ||
| Tensile modulus ( GPa ) | 2.4-3.3 | ||
| Tensile strength ( MPa ) | 80 |
Thermal Properties
| Coefficient of thermal expansion ( x10–6 K–1 ) | 70-77 | ||
| Heat-deflection temperature – 0.45MPa ( C ) | 105 | ||
| Heat-deflection temperature – 1.8MPa ( C ) | 95 | ||
| Lower working temperature ( C ) | -40 | ||
| Specific heat ( J K–1 kg–1 ) | 1400 – 1500 | ||
| Thermal conductivity @23C ( W m–1 K–1 ) | 0.17-0.19 | ||
| Upper working temperature ( C ) | 50 to 90 |
Other Properties
| Abbe number | 57.2 | ||
| Density ( g cm–3 ) | 1.19 | ||
| Flammability | HB | ||
| Limiting oxygen index ( % ) | 17-20 | ||
| Radiation resistance | Fair | ||
| Refractive index | 1.49 | ||
| Resistance to Ultra-violet | Good | ||
| Water absorption – over 24 hours ( % ) | 0.2 |
