PBI vs. UHMW-PE
PBI belongs to the thermoset plastics classification, while UHMW-PE belongs to the thermoplastics. There are 14 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 PBI and the bottom bar is UHMW-PE.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 5.9 | |
| 0.8 |
| Elongation at Break, % | 3.0 | |
| 400 |
| Tensile Strength: Ultimate (UTS), MPa | 160 | |
| 49 |
Thermal Properties
| Specific Heat Capacity, J/kg-K | 930 | |
| 1750 |
| Thermal Conductivity, W/m-K | 0.41 | |
| 0.41 |
| Thermal Expansion, µm/m-K | 23 | |
| 180 |
Electrical Properties
| Dielectric Constant (Relative Permittivity) At 1 Hz | 3.4 | |
| 2.2 |
Otherwise Unclassified Properties
| Density, g/cm3 | 1.3 | |
| 0.94 |
Common Calculations
| Stiffness to Weight: Axial, points | 2.5 | |
| 0.47 |
| Stiffness to Weight: Bending, points | 46 | |
| 33 |
| Strength to Weight: Axial, points | 34 | |
| 14 |
| Strength to Weight: Bending, points | 50 | |
| 32 |
| Thermal Diffusivity, mm2/s | 0.34 | |
| 0.25 |
| Thermal Shock Resistance, points | 84 | |
| 25 |