PAS vs. PFA

Both PAS and PFA 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.

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

Polyarylsulfone (PAS)Perfluoroalkoxy (PFA)

Metric UnitsUS Customary Units

Mechanical Properties

Elongation at Break, %		40
Elongation at Break, %		300

Flexural Modulus, GPa		2.8
Flexural Modulus, GPa		0.7

Tensile Strength: Ultimate (UTS), MPa		83
Tensile Strength: Ultimate (UTS), MPa		30

Thermal Properties

Heat Deflection Temperature At 1.82 MPa (264 psi), °C		200
Heat Deflection Temperature At 1.82 MPa (264 psi), °C		50

Thermal Expansion, µm/m-K		49
Thermal Expansion, µm/m-K		120

Electrical Properties

Dielectric Constant (Relative Permittivity) At 1 Hz		3.5
Dielectric Constant (Relative Permittivity) At 1 Hz		2.1

Dielectric Constant (Relative Permittivity) At 1 MHz		3.5
Dielectric Constant (Relative Permittivity) At 1 MHz		2.6

Dielectric Strength (Breakdown Potential), kV/mm		15
Dielectric Strength (Breakdown Potential), kV/mm		22

Electrical Resistivity Order of Magnitude, 10^x Ω-m		15
Electrical Resistivity Order of Magnitude, 10^x Ω-m		16

Otherwise Unclassified Properties

Density, g/cm³		1.4
Density, g/cm³		2.2

Limiting Oxygen Index (LOI), %		33
Limiting Oxygen Index (LOI), %		80

Water Absorption After 24 Hours, %		0.4
Water Absorption After 24 Hours, %		0

Common Calculations

Strength to Weight: Axial, points		17
Strength to Weight: Axial, points		3.9

Strength to Weight: Bending, points		31
Strength to Weight: Bending, points		10