FKM Rubber vs. PBI
FKM rubber belongs to the thermoset elastomers (rubber) classification, while PBI belongs to the thermoset plastics. There are 8 material properties with values for both materials. Properties with values for just one material (20, in this case) are not shown.
For each property being compared, the top bar is FKM rubber and the bottom bar is PBI.
Metric UnitsUS Customary Units
Material Properties
| Density, g/cm3 | 1.8 | |
| 1.3 |
| Elongation at Break, % | 300 | |
| 3.0 |
| Glass Transition Temperature, °C | -20 | |
| 410 |
| Limiting Oxygen Index (LOI), % | 51 | |
| 58 |
| Maximum Temperature: Mechanical, °C | 220 | |
| 340 |
| Strength to Weight: Axial, points | 1.1 | |
| 34 |
| Strength to Weight: Bending, points | 4.7 | |
| 50 |
| Tensile Strength: Ultimate (UTS), MPa | 7.5 | |
| 160 |