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Grade: Lexan® 8B28
Formula: PC
Form: Disk
Material: Polycarbonate
CAS Number: 25766-59-0
Commodity: Polymers
Colour:
Translucent White 82728
The Lexan® 8B28 Polycarbonate Disk is a high strength, transparent thermoplastic disk available in 30 variations. These disks can be customized for applications ranging from glazing and lenses, to medical devices and safety equipment where high impact resistance and optical clarity are required. Lexan® 8B28 Polycarbonate disks are also suitable for use in scientific instrumentation thanks to their dimensional stability and resistance to many chemicals.
Tolerances
Disk
| Thickness | ±20% |
|---|
Material Properties for Polymers
Physical Properties
| Element | Value |
|---|---|
| Abbe number | 34 |
| Flammability | V0-V2 |
| Radiation resistance | Fair |
| Refractive index | 1.584-6 |
| Resistance to Ultra-violet | Fair |
| Limiting oxygen index( % ) | 25-27 |
| Water absorption - equilibrium( % ) | 0.35 |
| Water absorption - over 24 hours( % ) | 0.1 |
| Density( gcm⁻³ ) | 1.2 |
Chemical Resistance
| Element | Value |
|---|---|
| Acids - concentrated | Good |
| Acids - dilute | Good |
| Alcohols | Good |
| Alkalis | Good-Poor |
| Aromatic hydrocarbons | Poor |
| Greases and Oils | Good-Fair |
| Halogenated Hydrocarbons | Good-Poor |
| Halogens | Poor |
| Ketones | Poor |
Mechanical Properties
| Element | Value |
|---|---|
| Coefficient of friction | 0.31 |
| Hardness - Rockwell | M70 |
| Poisson's ratio | 0.37 |
| Elongation at break( % ) | 100-150 |
| Tensile modulus( GPa ) | 2.3-2.4 |
| Izod impact strength( J m⁻¹ ) | 600-850 |
| Abrasive resistance - ASTM D1044( mg/1000 cycles ) | Oct-15 |
| Tensile strength( MPa ) | 55-75 |
Electrical Properties
| Element | Value |
|---|---|
| Dielectric constant @1MHz | 2.9 |
| Dissipation factor @ 1MHz | 0.01 |
| Dielectric strength( kV mm⁻¹ ) | 15-67 |
| Surface resistivity( Ohm/sq ) | 10¹⁵ |
| Volume resistivity( Ohmcm ) | 10¹⁴-10¹⁶ |
Thermal Properties
| Element | Value |
|---|---|
| Heat-deflection temperature - 0.45MPa( C ) | 140 |
| Heat-deflection temperature - 1.8MPa( C ) | 128-138 |
| Lower working temperature( C ) | -135 |
| Upper working temperature( C ) | 115-130 |
| Specific heat( J K⁻¹ kg⁻¹ ) | 1200 |
| Thermal conductivity( W m⁻¹ K⁻¹ ) | 0.19-0.22@23°C |
| Coefficient of thermal expansion( x10⁻⁶ K⁻¹ ) | 66-70 |
Pultrusions
| Element | Value |
|---|---|
| Compressive strength( MPa ) | >80 |