COC vs. FEP
Both COC and FEP 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. 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 COC and the bottom bar is FEP.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 3.0 | |
| 0.43 |
| Elongation at Break, % | 2.5 | |
| 300 |
| Tensile Strength: Ultimate (UTS), MPa | 60 | |
| 20 |
Thermal Properties
| Heat Deflection Temperature At 455 kPa (66 psi), °C | 130 | |
| 70 |
| Thermal Expansion, µm/m-K | 60 | |
| 95 |
Electrical Properties
| Electrical Resistivity Order of Magnitude, 10x Ω-m | 14 | |
| 16 |
Otherwise Unclassified Properties
| Density, g/cm3 | 1.0 | |
| 2.1 |
| Refractive Index | 1.5 | |
| 1.4 |
| Water Absorption After 24 Hours, % | 0 | |
| 0.010 |
Common Calculations
| Stiffness to Weight: Axial, points | 1.7 | |
| 0.11 |
| Stiffness to Weight: Bending, points | 48 | |
| 12 |
| Strength to Weight: Axial, points | 17 | |
| 2.6 |
| Strength to Weight: Bending, points | 34 | |
| 7.6 |
| Thermal Shock Resistance, points | 24 | |
| 35 |