|
Property |
Test
Method |
Cast Acrylic |
Extruded Acrylic |
Polycarbonate |
|
Mechanical
Properties |
| Specific Gravity |
ASTM
D792 |
1.19 |
1.19 |
1.2 |
| Tensile Strength (p.s.i.) |
ASTM
D638 |
10,000 |
10,000 |
9,500 |
| Compressive Strength (p.s.i) |
ASTM
D695 |
18,000 |
17,000 |
12,500 |
| Rockwell
Hardness |
ASTM
D785 |
M-94 |
M-93 |
R-118 |
| Impact Strength 73°F
Notched (ft-lbs/in) |
ASTM
D256 |
0.4 |
0.4 |
12-16 |
|
Thermal
Properties |
| Heat Deflection at
264psi (°F) |
ASTM
D648 |
210 |
195 |
270 |
| Continuous Service
Temperature (°F) |
- |
180 |
160 |
250 |
| Thermal Conductivity
(BTU-in/ft²-hr-°F) |
ASTM
C177 |
1.3 |
1.3 |
1.35 |
| Coefficient of Linear
Thermal Expansion (in/in/°F) |
ASTM
D696 |
0.000034 |
0.000040 |
0.0000375 |
|
Electrical
Properties |
| Dielectric Constant
At 60HZ |
ASTM
D150 |
3.5 |
3.6 |
3.17 |
| Dissipation Factor At
60HZ |
ASTM
D150 |
0.06 |
0.06 |
0.0009 |
|
Optical |
| Light Transmission |
ATSM D1003 |
92% |
92% |
> 88% |
| Water Absorption
Rates |
| Water Absorption -24
hrs.(%) |
ASTM
D570 |
0.2% |
0.2% |
0.15% |
