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The range of properties that can be developed for any given polymer is limited by the material itself, and will vary within that range with compound formulation. All properties in a particular class are not found in a single compound. However it is often possible to raise or lower some ratings to acceptable levels through creative compounding.
|
Physical Properties |
Natural Rubber |
SBR |
EPDM |
Neoprene |
Nitrile |
Urethane |
Silicone |
Fluorocarbon |
| Specific Gravity |
0.93 |
0.94 |
0.86 |
1.23 |
1.00 |
1.05 to 1.25 |
0.95 to 1.20 |
1.4 to 1.95 |
| Durometer, Range |
30-100 |
40-100 |
30-90 |
40-95 |
30-90 |
55-100 |
25-90 |
55-90 |
| Tensile Strength |
E |
F-G |
VG |
VG |
VG |
E |
F-G |
VG |
| Elongation |
VG-E |
G |
G |
G |
G |
G-VG |
VG-E |
F-G |
| Compression Set |
G |
G |
G |
F-G |
G |
G-E |
G-E |
G-E |
| Heat Resistance |
F |
F-G |
VG-E |
F-G |
G |
F-G |
E |
E |
| Resilience or Rebound |
E |
F-G |
G |
VG |
F-G |
F-E |
G |
F |
| Impact Resistance |
E |
E |
G |
G |
F |
G-E |
P-G |
E |
| Abrasion Resistance |
E |
G-E |
G-E |
G-E |
G-E |
E |
P-F |
F-G |
| Tear Resistance |
E |
F |
F-G |
F-G |
F-G |
E |
P-F |
F |
| Cut Growth |
E |
G |
G |
G |
G |
G-E |
P-F |
P-F |
| Flame Resistance |
P |
P |
P |
G |
P |
P-F |
F-G |
VG-E |
| Impermeability, Gas |
F |
F |
F-G |
F-G |
G |
P-F |
F-G |
E |
| Weathering Resistance |
P-F |
F |
E |
VG |
F-G |
G-E |
E |
E |
| Low Temperature Limit* |
-10° TO -50°F |
0° TO -50°F |
-20° TO -60°F |
-10° TO -50°F |
-30° TO -40°F |
-10° TO -50°F |
-65° TO -150°F |
+10° TO -40°F |
| High Temperature Limit* |
158° TO 225°F |
158° TO 225°F |
300° TO 350°F |
225°F |
275°F |
250°F |
400° TO 550°F |
400° TO 450°F |
| P = Poor | F = Fair | G = Good | VG = Very Good | E = Excellent |
