NBR Rubber vs. PBI
NBR rubber belongs to the thermoset elastomers (rubber) classification, while PBI belongs to the thermoset plastics. There are 10 material properties with values for both materials. Properties with values for just one material (18, in this case) are not shown.
For each property being compared, the top bar is NBR rubber and the bottom bar is PBI.
Metric UnitsUS Customary Units
Material Properties
| Density, g/cm3 | 1.3 | |
| 1.3 |
| Elongation at Break, % | 380 | |
| 3.0 |
| Glass Transition Temperature, °C | -30 | |
| 410 |
| Maximum Temperature: Mechanical, °C | 110 | |
| 340 |
| Specific Heat Capacity, J/kg-K | 1350 | |
| 930 |
| Strength to Weight: Axial, points | 3.9 | |
| 34 |
| Strength to Weight: Bending, points | 12 | |
| 50 |
| Tensile Strength: Ultimate (UTS), MPa | 18 | |
| 160 |
| Thermal Conductivity, W/m-K | 0.25 | |
| 0.41 |
| Thermal Diffusivity, mm2/s | 0.15 | |
| 0.34 |