PP Homopolymer vs. PEI
Both PP homopolymer and PEI are thermoplastics. There are 15 material properties with values for both materials. Properties with values for just one material (15, in this case) are not shown.
For each property being compared, the top bar is PP homopolymer and the bottom bar is PEI.
Metric UnitsUS Customary Units
Mechanical Properties
| Compressive (Crushing) Strength, MPa | 45 to 64 | |
| 140 to 180 |
| Elongation at Break, % | 3.0 to 80 | |
| 3.0 to 34 |
| Flexural Modulus, GPa | 1.5 to 7.0 | |
| 3.4 to 5.9 |
| Flexural Strength, MPa | 41 to 100 | |
| 140 to 210 |
| Impact Strength: Notched Izod, J/m | 42 to 95 | |
| 55 to 110 |
| Tensile Strength: Ultimate (UTS), MPa | 36 to 93 | |
| 110 to 160 |
Thermal Properties
| Glass Transition Temperature, °C | 170 | |
| 210 |
| Heat Deflection Temperature At 1.82 MPa (264 psi), °C | 73 to 160 | |
| 200 to 210 |
| Maximum Temperature: Mechanical, °C | 120 | |
| 170 |
| Specific Heat Capacity, J/kg-K | 1230 to 1900 | |
| 1050 to 1220 |
| Thermal Expansion, µm/m-K | 30 to 90 | |
| 20 to 53 |
Otherwise Unclassified Properties
| Density, g/cm3 | 0.91 to 1.2 | |
| 1.3 to 1.5 |
| Water Absorption At Saturation, % | 0.010 to 0.090 | |
| 0.9 to 1.3 |
Common Calculations
| Strength to Weight: Axial, points | 11 to 21 | |
| 24 to 30 |
| Strength to Weight: Bending, points | 27 to 37 | |
| 40 to 44 |