PEEK vs. PP Homopolymer
Both PEEK and PP homopolymer are thermoplastics. There are 16 material properties with values for both materials. Properties with values for just one material (13, in this case) are not shown.
For each property being compared, the top bar is PEEK and the bottom bar is PP homopolymer.
Metric UnitsUS Customary Units
Mechanical Properties
| Compressive (Crushing) Strength, MPa | 120 to 300 | |
| 45 to 64 |
| Elongation at Break, % | 1.6 to 43 | |
| 3.0 to 80 |
| Flexural Modulus, GPa | 3.8 to 19 | |
| 1.5 to 7.0 |
| Flexural Strength, MPa | 150 to 330 | |
| 41 to 100 |
| Impact Strength: Notched Izod, J/m | 78 to 120 | |
| 42 to 95 |
| Rockwell R Hardness | 120 | |
| 90 to 110 |
| Tensile Strength: Ultimate (UTS), MPa | 97 to 200 | |
| 36 to 93 |
Thermal Properties
| Glass Transition Temperature, °C | 240 | |
| 170 |
| Heat Deflection Temperature At 1.82 MPa (264 psi), °C | 160 to 300 | |
| 73 to 160 |
| Maximum Temperature: Mechanical, °C | 330 | |
| 120 |
| Specific Heat Capacity, J/kg-K | 1390 to 1700 | |
| 1230 to 1900 |
| Thermal Expansion, µm/m-K | 15 to 52 | |
| 30 to 90 |
Otherwise Unclassified Properties
| Density, g/cm3 | 1.3 to 1.5 | |
| 0.91 to 1.2 |
| Water Absorption At Saturation, % | 0.22 to 0.5 | |
| 0.010 to 0.090 |
Common Calculations
| Strength to Weight: Axial, points | 20 to 41 | |
| 11 to 21 |
| Strength to Weight: Bending, points | 36 to 55 | |
| 27 to 37 |