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Formula: PMMA, Acrylic
Form: Disk
Material: PMMA
CAS Number: 9011-14-7
Commodity: Polymers
Transparency:
Clear/Transparent
PMMA disks exhibit properties like optical clarity, UV resistance and high light transmittance. With over 34 variations available, these disks have widespread applications including glazing, lenses, light covers and transparent armor. The large choice of PMMA disks we offer allows you to select the optimal grade and dimensions for your specific application.
Tolerances
Disk
| Thickness | ±20% |
|---|
Material Properties for Polymers
Physical Properties
| Element | Value |
|---|---|
| Abbe number | 57.2 |
| Flammability | HB |
| Radiation resistance | Fair |
| Refractive index | 1.49 |
| Resistance to Ultra-violet | Good |
| Limiting oxygen index( % ) | 17-20 |
| Water absorption - over 24 hours( % ) | 0.2 |
| Density( gcm⁻³ ) | 1.19 |
Chemical Resistance
| Element | Value |
|---|---|
| Acids - concentrated | Good-Poor |
| Acids - dilute | Good-Poor |
| Alcohols | Good-Poor |
| Alkalis | Good |
| Aromatic hydrocarbons | Poor |
| Greases and Oils | Good |
| Halogenated Hydrocarbons | Poor |
| Halogens | Poor |
| Ketones | Poor |
Electrical Properties
| Element | Value |
|---|---|
| Dielectric constant @1MHz | 2.6 |
| Dissipation factor @ 1MHz | 0.014 |
| Dielectric strength( kV mm⁻¹ ) | 15 |
| Surface resistivity( Ohm/sq ) | 10¹⁴ |
| Volume resistivity( Ohmcm ) | 2-14 x 10¹⁵ |
Mechanical Properties
| Element | Value |
|---|---|
| Hardness - Rockwell | M92-100 |
| Poisson's ratio | 0.35-0.4 |
| Elongation at break( % ) | 2.5-4 |
| Tensile modulus( GPa ) | 2.4-3.3 |
| Izod impact strength( J m⁻¹ ) | 16-32 |
| Tensile strength( MPa ) | 80 |
Thermal Properties
| Element | Value |
|---|---|
| Heat-deflection temperature - 0.45MPa( C ) | 105 |
| Heat-deflection temperature - 1.8MPa( C ) | 95 |
| Lower working temperature( C ) | -40 |
| Upper working temperature( C ) | 50-90 |
| Specific heat( J K⁻¹ kg⁻¹ ) | 1400-1500 |
| Thermal conductivity( W m⁻¹ K⁻¹ ) | 0.17-0.19@23°C |
| Coefficient of thermal expansion( x10⁻⁶ K⁻¹ ) | 70-77 |