PEEK vs. LDPE
Both PEEK and LDPE are thermoplastics. There are 16 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 PEEK and the bottom bar is LDPE.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 4.0 to 24 | |
| 0.3 |
| Tensile Strength: Ultimate (UTS), MPa | 97 to 200 | |
| 7.0 |
Thermal Properties
| Glass Transition Temperature, °C | 240 | |
| -130 |
| Maximum Temperature: Autoignition, °C | 600 | |
| 380 |
| Maximum Temperature: Decomposition, °C | 570 | |
| 400 |
| Melting Onset (Solidus), °C | 340 | |
| 110 |
| Specific Heat Capacity, J/kg-K | 1390 to 1700 | |
| 2300 |
| Thermal Conductivity, W/m-K | 0.25 to 0.93 | |
| 0.36 |
| Thermal Expansion, µm/m-K | 15 to 52 | |
| 220 |
Otherwise Unclassified Properties
| Density, g/cm3 | 1.3 to 1.5 | |
| 0.92 |
Common Calculations
| Stiffness to Weight: Axial, points | 1.5 to 10 | |
| 0.18 |
| Stiffness to Weight: Bending, points | 36 to 73 | |
| 24 |
| Strength to Weight: Axial, points | 20 to 41 | |
| 2.1 |
| Strength to Weight: Bending, points | 36 to 55 | |
| 8.8 |
| Thermal Diffusivity, mm2/s | 0.1 to 0.51 | |
| 0.17 |
| Thermal Shock Resistance, points | 34 to 57 | |
| 7.6 |