EVA vs. PEI
Both EVA and PEI are thermoplastics. There are 13 material properties with values for both materials. Properties with values for just one material (19, in this case) are not shown.
For each property being compared, the top bar is EVA and the bottom bar is PEI.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 0.015 to 0.080 | |
| 3.4 to 5.6 |
| Elongation at Break, % | 300 to 800 | |
| 3.0 to 34 |
| Tensile Strength: Ultimate (UTS), MPa | 3.0 to 35 | |
| 110 to 160 |
Thermal Properties
| Maximum Temperature: Decomposition, °C | 450 | |
| 530 |
| Specific Heat Capacity, J/kg-K | 1400 | |
| 1050 to 1220 |
| Thermal Conductivity, W/m-K | 0.34 | |
| 0.18 to 0.23 |
Electrical Properties
| Dielectric Strength (Breakdown Potential), kV/mm | 21 | |
| 30 to 33 |
Otherwise Unclassified Properties
| Density, g/cm3 | 0.93 to 1.0 | |
| 1.3 to 1.5 |
Common Calculations
| Stiffness to Weight: Axial, points | 0.0087 to 0.048 | |
| 1.5 to 2.1 |
| Stiffness to Weight: Bending, points | 8.6 to 15 | |
| 39 |
| Strength to Weight: Axial, points | 0.87 to 10 | |
| 24 to 30 |
| Strength to Weight: Bending, points | 4.8 to 26 | |
| 40 to 44 |
| Thermal Diffusivity, mm2/s | 0.25 to 0.26 | |
| 0.11 to 0.14 |