PP Copolymer vs. FEP
Both PP copolymer and FEP are thermoplastics. There are 16 material properties with values for both materials. Properties with values for just one material (15, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.
For each property being compared, the top bar is PP copolymer and the bottom bar is FEP.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 0.9 to 1.1 | |
| 0.43 |
| Elongation at Break, % | 12 | |
| 300 |
| Flexural Modulus, GPa | 1.3 | |
| 0.6 |
| Flexural Strength, MPa | 31 | |
| 24 |
| Tensile Strength: Ultimate (UTS), MPa | 23 to 33 | |
| 20 |
Thermal Properties
| Heat Deflection Temperature At 1.82 MPa (264 psi), °C | 50 to 100 | |
| 50 |
| Heat Deflection Temperature At 455 kPa (66 psi), °C | 82 to 98 | |
| 70 |
| Maximum Temperature: Mechanical, °C | 80 | |
| 200 |
| Melting Onset (Solidus), °C | 150 | |
| 260 |
Electrical Properties
| Dielectric Constant (Relative Permittivity) At 1 Hz | 2.2 to 2.3 | |
| 1.9 |
| Dielectric Strength (Breakdown Potential), kV/mm | 21 to 22 | |
| 22 |
Otherwise Unclassified Properties
| Density, g/cm3 | 0.9 | |
| 2.1 |
Common Calculations
| Stiffness to Weight: Axial, points | 0.56 to 0.68 | |
| 0.11 |
| Stiffness to Weight: Bending, points | 36 to 38 | |
| 12 |
| Strength to Weight: Axial, points | 7.1 to 10 | |
| 2.6 |
| Strength to Weight: Bending, points | 20 to 25 | |
| 7.6 |