PEI vs. PPS
Both PEI and PPS are thermoplastics. There are 14 material properties with values for both materials. Properties with values for just one material (16, in this case) are not shown.
For each property being compared, the top bar is PEI and the bottom bar is PPS.
Metric UnitsUS Customary Units
Mechanical Properties
| Compressive (Crushing) Strength, MPa | 140 to 180 | |
| 95 to 160 |
| Elongation at Break, % | 3.0 to 34 | |
| 2.5 to 11 |
| Flexural Modulus, GPa | 3.4 to 5.9 | |
| 13 to 17 |
| Flexural Strength, MPa | 140 to 210 | |
| 120 to 190 |
| Impact Strength: Notched Izod, J/m | 55 to 110 | |
| 21 to 80 |
| Tensile Strength: Ultimate (UTS), MPa | 110 to 160 | |
| 75 to 190 |
Thermal Properties
| Glass Transition Temperature, °C | 210 | |
| 190 to 290 |
| Heat Deflection Temperature At 1.82 MPa (264 psi), °C | 200 to 210 | |
| 130 to 260 |
| Specific Heat Capacity, J/kg-K | 1050 to 1220 | |
| 910 to 1000 |
| Thermal Expansion, µm/m-K | 20 to 53 | |
| 20 to 45 |
Otherwise Unclassified Properties
| Density, g/cm3 | 1.3 to 1.5 | |
| 1.3 to 1.7 |
| Water Absorption At Saturation, % | 0.9 to 1.3 | |
| 0.060 to 0.1 |
Common Calculations
| Strength to Weight: Axial, points | 24 to 30 | |
| 16 to 37 |
| Strength to Weight: Bending, points | 40 to 44 | |
| 30 to 52 |