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PCTFE vs. PFA

Both PCTFE and PFA are thermoplastics. There are 18 material properties with values for both materials. Properties with values for just one material (14, in this case) are not shown.

For each property being compared, the top bar is PCTFE and the bottom bar is PFA.

Metric UnitsUS Customary Units

Mechanical Properties

Elongation at Break, % 150
300
Flexural Modulus, GPa 1.2
0.7
Tensile Strength: Ultimate (UTS), MPa 36
30

Thermal Properties

Heat Deflection Temperature At 1.82 MPa (264 psi), °C 110
50
Heat Deflection Temperature At 455 kPa (66 psi), °C 130
75
Maximum Temperature: Mechanical, °C 150
260
Melting Onset (Solidus), °C 220
300
Specific Heat Capacity, J/kg-K 920
1000
Thermal Conductivity, W/m-K 0.21
0.25
Thermal Expansion, µm/m-K 130
120

Electrical Properties

Dielectric Strength (Breakdown Potential), kV/mm 21
22
Electrical Resistivity Order of Magnitude, 10x Ω-m 16
16

Otherwise Unclassified Properties

Density, g/cm3 2.1
2.2
Limiting Oxygen Index (LOI), % 80
80
Water Absorption After 24 Hours, % 0.0094
0

Common Calculations

Strength to Weight: Axial, points 4.6
3.9
Strength to Weight: Bending, points 11
10
Thermal Diffusivity, mm2/s 0.11
0.12