PFA vs. RPU

PFA belongs to the thermoplastics classification, while RPU belongs to the thermoset plastics. There are 12 material properties with values for both materials. Properties with values for just one material (17, in this case) are not shown.

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

Perfluoroalkoxy (PFA)Rigid Thermoset Polyurethane (RPU)

Metric UnitsUS Customary Units

Mechanical Properties

Elongation at Break, %		300
Elongation at Break, %		90

Flexural Modulus, GPa		0.7
Flexural Modulus, GPa		2.0

Tensile Strength: Ultimate (UTS), MPa		30
Tensile Strength: Ultimate (UTS), MPa		60

Thermal Properties

Specific Heat Capacity, J/kg-K		1000
Specific Heat Capacity, J/kg-K		1750

Thermal Conductivity, W/m-K		0.25
Thermal Conductivity, W/m-K		0.19

Thermal Expansion, µm/m-K		120
Thermal Expansion, µm/m-K		63

Electrical Properties

Dielectric Strength (Breakdown Potential), kV/mm		22
Dielectric Strength (Breakdown Potential), kV/mm		19

Electrical Resistivity Order of Magnitude, 10^x Ω-m		16
Electrical Resistivity Order of Magnitude, 10^x Ω-m		13

Otherwise Unclassified Properties

Density, g/cm³		2.2
Density, g/cm³		1.2

Common Calculations

Strength to Weight: Axial, points		3.9
Strength to Weight: Axial, points		14

Strength to Weight: Bending, points		10
Strength to Weight: Bending, points		28

Thermal Diffusivity, mm²/s		0.12
Thermal Diffusivity, mm²/s		0.090