PPSU vs. PTFE

Both PPSU and PTFE are thermoplastics. There are 16 material properties with values for both materials. Properties with values for just one material (18, in this case) are not shown.

For each property being compared, the top bar is PPSU and the bottom bar is PTFE.

Polyphenylsulfone (PPSU)Polytetrafluoroethylene (PTFE)

Metric UnitsUS Customary Units

Mechanical Properties

Compressive (Crushing) Strength, MPa		140
Compressive (Crushing) Strength, MPa		6.9 to 24

Elongation at Break, %		26
Elongation at Break, %		75 to 300

Flexural Modulus, GPa		4.7
Flexural Modulus, GPa		0.4 to 1.3

Flexural Strength, MPa		130
Flexural Strength, MPa		13 to 50

Tensile Strength: Ultimate (UTS), MPa		95
Tensile Strength: Ultimate (UTS), MPa		13 to 25

Thermal Properties

Heat Deflection Temperature At 1.82 MPa (264 psi), °C		210
Heat Deflection Temperature At 1.82 MPa (264 psi), °C		66 to 70

Maximum Temperature: Mechanical, °C		160
Maximum Temperature: Mechanical, °C		260 to 270

Thermal Conductivity, W/m-K		0.24
Thermal Conductivity, W/m-K		0.24 to 0.65

Thermal Expansion, µm/m-K		45
Thermal Expansion, µm/m-K		110 to 120

Electrical Properties

Dielectric Constant (Relative Permittivity) At 1 MHz		3.4
Dielectric Constant (Relative Permittivity) At 1 MHz		2.1 to 2.4

Electrical Resistivity Order of Magnitude, 10^x Ω-m		14
Electrical Resistivity Order of Magnitude, 10^x Ω-m		2.0 to 18

Otherwise Unclassified Properties

Density, g/cm³		1.4
Density, g/cm³		2.1 to 2.3

Limiting Oxygen Index (LOI), %		38
Limiting Oxygen Index (LOI), %		90

Water Absorption After 24 Hours, %		0.44
Water Absorption After 24 Hours, %		0.0093 to 0.050

Common Calculations

Strength to Weight: Axial, points		19
Strength to Weight: Axial, points		1.7 to 3.2

Strength to Weight: Bending, points		33
Strength to Weight: Bending, points		5.7 to 8.7