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Acrylic
Plastic
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Acrylic
plastic is created through the polymerization of acrylic esters.
Acrylic is available in several forms, such as cast sheet,
continuous cast and extruded sheet, and film.
- Cast acrylic sheets are strong,
stable, weather resistant, and thermoformable. Transparent,
translucent, opaque colors, and different surface textures
exist.
- Dimensional shape, color, and
transparency gloss are virtually unaffected with exposure to
light.
- Acrylic plastics are among the most
scratch resistant plastics available.
- The light weight and toughness of
acrylic qualifies it for many jobs formerly held by glass.
- Acrylic plastic is known for its
attractive and glossy surfaces that are available in most
colors.
- Acrylic plastic is used for many
items, such as aircrafts, boats, mass transit, architectural and
protective glazing, internally illuminated outdoor signs,
product prototypes, lighting diffusers, skylights, demonstration
models, and point-of-purchase (POP) displays.
Specifications:
| |
Molding Grade |
|
Property |
Cast Sheet |
Standard |
High Impact |
| PHYSICAL PROPERTIES |
| Specific gravity |
1.19 |
1.19 |
1.15-1.17 |
| Specific volume (in^3/lb) |
23.3 |
23.3 |
24.1 |
| Water absorption, 24 h, (%) |
0.2 |
0.3 |
0.3 |
| MECHANICAL
PROPERTIES |
| Tensile strength (psi) |
10,500 |
10,500 |
5,400-7,000 |
| Elongation (%) |
5 |
5 |
50 |
| Tensile modulus (10^5 psi) |
4.5 |
4.3 |
2.2-3.2 |
| Flexural strength (psi) |
16,500 |
16,000 |
7,000-10,500 |
| Flexural modulus (10^5 psi) |
4.5 |
4.5 |
2.3-3.2 |
| Impact strength, Izod,
(ft-lb/in of notch) |
0.4 |
0.4 |
0.6-1.2 |
| Hardness, Rockwell |
M100-102 |
M95 |
R99-M68 |
| THERMAL
PROPERTIES |
| Coefficient of thermal
expansion |
3.9 |
3.6 |
3.8 |
| Deflection temperature (F) |
|
|
At 264 psi |
200-215 |
198 |
170-190 |
|
At 66 psi |
225 |
214 |
187 |
| ELECTRICAL
PROPERTIES |
| Dielectric strength (V/mil) |
500 |
500 |
383-450 |
| Dielectric constant |
|
|
At 1 kHz |
3.3 |
3.3 |
3.9 |
|
At 1 MHz |
2.5 |
2.3 |
2.5-3.0 |
| Dissipation factor |
|
|
At 1 kHz |
0.04 |
0.04 |
- |
|
At 1 MHz |
0.02-0.03 |
0.02-0.03 |
0.01-0.02 |
| Volume resistivity (ohm-cm)
At 73 F 50% RH |
>10^17 |
>10^17 |
>10^15 |
| Arc resistance (s) |
No Track |
No Track |
No Track |
| OPTICAL
PROPERTIES |
| Refractive index |
1.49 |
1.49 |
1.49 |
| Transmittance (%) |
92 |
92 |
90 |
*Information provided by IAPD
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