PLA vs. PEI
Both PLA and PEI are thermoplastics. There are 15 material properties with values for both materials. Properties with values for just one material (17, in this case) are not shown.
For each property being compared, the top bar is PLA and the bottom bar is PEI.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 3.5 | |
| 3.4 to 5.6 |
| Elongation at Break, % | 6.0 | |
| 3.0 to 34 |
| Flexural Modulus, GPa | 4.0 | |
| 3.4 to 5.9 |
| Flexural Strength, MPa | 80 | |
| 140 to 210 |
| Tensile Strength: Ultimate (UTS), MPa | 50 | |
| 110 to 160 |
Thermal Properties
| Glass Transition Temperature, °C | 60 | |
| 210 |
| Maximum Temperature: Mechanical, °C | 50 | |
| 170 |
| Specific Heat Capacity, J/kg-K | 1800 | |
| 1050 to 1220 |
| Thermal Conductivity, W/m-K | 0.13 | |
| 0.18 to 0.23 |
Otherwise Unclassified Properties
| Density, g/cm3 | 1.3 | |
| 1.3 to 1.5 |
Common Calculations
| Stiffness to Weight: Axial, points | 1.6 | |
| 1.5 to 2.1 |
| Stiffness to Weight: Bending, points | 40 | |
| 39 |
| Strength to Weight: Axial, points | 11 | |
| 24 to 30 |
| Strength to Weight: Bending, points | 24 | |
| 40 to 44 |
| Thermal Diffusivity, mm2/s | 0.058 | |
| 0.11 to 0.14 |