PEI vs. LDPE
Both PEI and LDPE are thermoplastics. There are 15 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 PEI and the bottom bar is LDPE.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 3.4 to 5.6 | |
| 0.3 |
| Tensile Strength: Ultimate (UTS), MPa | 110 to 160 | |
| 7.0 |
Thermal Properties
| Glass Transition Temperature, °C | 210 | |
| -130 |
| Maximum Temperature: Autoignition, °C | 530 | |
| 380 |
| Maximum Temperature: Decomposition, °C | 530 | |
| 400 |
| Specific Heat Capacity, J/kg-K | 1050 to 1220 | |
| 2300 |
| Thermal Conductivity, W/m-K | 0.18 to 0.23 | |
| 0.36 |
| Thermal Expansion, µm/m-K | 20 to 53 | |
| 220 |
Otherwise Unclassified Properties
| Density, g/cm3 | 1.3 to 1.5 | |
| 0.92 |
Common Calculations
| Stiffness to Weight: Axial, points | 1.5 to 2.1 | |
| 0.18 |
| Stiffness to Weight: Bending, points | 39 | |
| 24 |
| Strength to Weight: Axial, points | 24 to 30 | |
| 2.1 |
| Strength to Weight: Bending, points | 40 to 44 | |
| 8.8 |
| Thermal Diffusivity, mm2/s | 0.11 to 0.14 | |
| 0.17 |
| Thermal Shock Resistance, points | 44 to 100 | |
| 7.6 |