PEI vs. LCP
Both PEI and LCP are thermoplastics. There are 14 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 PEI and the bottom bar is LCP.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 3.4 to 5.6 | |
| 11 to 24 |
| Elongation at Break, % | 3.0 to 34 | |
| 1.0 to 3.0 |
| Flexural Modulus, GPa | 3.4 to 5.9 | |
| 9.0 to 23 |
| Flexural Strength, MPa | 140 to 210 | |
| 160 to 320 |
| Tensile Strength: Ultimate (UTS), MPa | 110 to 160 | |
| 180 to 230 |
Thermal Properties
| Heat Deflection Temperature At 1.82 MPa (264 psi), °C | 200 to 210 | |
| 240 to 270 |
| Maximum Temperature: Decomposition, °C | 530 | |
| 520 |
| Specific Heat Capacity, J/kg-K | 1050 to 1220 | |
| 1020 to 1200 |
Otherwise Unclassified Properties
| Density, g/cm3 | 1.3 to 1.5 | |
| 1.4 to 1.6 |
| Limiting Oxygen Index (LOI), % | 47 to 50 | |
| 35 |
Common Calculations
| Stiffness to Weight: Axial, points | 1.5 to 2.1 | |
| 4.4 to 8.9 |
| Stiffness to Weight: Bending, points | 39 | |
| 51 to 65 |
| Strength to Weight: Axial, points | 24 to 30 | |
| 33 to 43 |
| Strength to Weight: Bending, points | 40 to 44 | |
| 45 to 56 |