PBI vs. PSU
PBI belongs to the thermoset plastics classification, while PSU belongs to the thermoplastics. There are 12 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 PSU.
Metric UnitsUS Customary Units
Mechanical Properties
| Compressive (Crushing) Strength, MPa | 350 | |
| 95 to 180 |
| Elongation at Break, % | 3.0 | |
| 2.0 to 52 |
| Flexural Modulus, GPa | 6.5 | |
| 2.7 to 14 |
| Flexural Strength, MPa | 220 | |
| 110 to 200 |
| Impact Strength: Notched Izod, J/m | 27 | |
| 59 to 100 |
| Tensile Strength: Ultimate (UTS), MPa | 160 | |
| 70 to 140 |
Thermal Properties
| Heat Deflection Temperature At 1.82 MPa (264 psi), °C | 430 | |
| 180 to 200 |
| Specific Heat Capacity, J/kg-K | 930 | |
| 910 to 1000 |
| Thermal Expansion, µm/m-K | 23 | |
| 25 to 57 |
Otherwise Unclassified Properties
| Density, g/cm3 | 1.3 | |
| 1.2 to 1.6 |
Common Calculations
| Strength to Weight: Axial, points | 34 | |
| 16 to 25 |
| Strength to Weight: Bending, points | 50 | |
| 30 to 40 |