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COC vs. PFA

Both COC and PFA are thermoplastics. There are 10 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 COC and the bottom bar is PFA.

Metric UnitsUS Customary Units

Material Properties

Density, g/cm3 1.0
2.2
Electrical Resistivity Order of Magnitude, 10x Ω-m 14
16
Elongation at Break, % 2.5
300
Heat Deflection Temperature At 455 kPa (66 psi), °C 130
75
Refractive Index 1.5
1.4
Strength to Weight: Axial, points 17
3.9
Strength to Weight: Bending, points 34
10
Tensile Strength: Ultimate (UTS), MPa 60
30
Thermal Expansion, µm/m-K 60
120
Water Absorption After 24 Hours, % 0
0