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FEP vs. COC

Both FEP and COC 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 FEP and the bottom bar is COC.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 0.43
3.0
Elongation at Break, % 300
2.5
Tensile Strength: Ultimate (UTS), MPa 20
60

Thermal Properties

Heat Deflection Temperature At 455 kPa (66 psi), °C 70
130
Thermal Expansion, µm/m-K 95
60

Electrical Properties

Electrical Resistivity Order of Magnitude, 10x Ω-m 16
14

Otherwise Unclassified Properties

Density, g/cm3 2.1
1.0
Refractive Index 1.4
1.5
Water Absorption After 24 Hours, % 0.010
0

Common Calculations

Stiffness to Weight: Axial, points 0.11
1.7
Stiffness to Weight: Bending, points 12
48
Strength to Weight: Axial, points 2.6
17
Strength to Weight: Bending, points 7.6
34
Thermal Shock Resistance, points 35
24