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