PTFE vs. PPE

Both PTFE and PPE are thermoplastics. There are 14 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 PTFE and the bottom bar is PPE.

Polytetrafluoroethylene (PTFE)Polyphenylene Ether (PPE)

Metric UnitsUS Customary Units

Mechanical Properties

Elongation at Break, %		75 to 300
Elongation at Break, %		30

Flexural Strength, MPa		13 to 50
Flexural Strength, MPa		75

Tensile Strength: Ultimate (UTS), MPa		13 to 25
Tensile Strength: Ultimate (UTS), MPa		55

Thermal Properties

Heat Deflection Temperature At 1.82 MPa (264 psi), °C		66 to 70
Heat Deflection Temperature At 1.82 MPa (264 psi), °C		120

Maximum Temperature: Mechanical, °C		260 to 270
Maximum Temperature: Mechanical, °C		90

Melting Onset (Solidus), °C		330 to 340
Melting Onset (Solidus), °C		260

Thermal Conductivity, W/m-K		0.24 to 0.65
Thermal Conductivity, W/m-K		0.22

Thermal Expansion, µm/m-K		110 to 120
Thermal Expansion, µm/m-K		90

Electrical Properties

Dielectric Constant (Relative Permittivity) At 1 MHz		2.1 to 2.4
Dielectric Constant (Relative Permittivity) At 1 MHz		2.7

Electrical Resistivity Order of Magnitude, 10^x Ω-m		2.0 to 18
Electrical Resistivity Order of Magnitude, 10^x Ω-m		13

Otherwise Unclassified Properties

Density, g/cm³		2.1 to 2.3
Density, g/cm³		1.1

Water Absorption After 24 Hours, %		0.0093 to 0.050
Water Absorption After 24 Hours, %		0.23

Common Calculations

Strength to Weight: Axial, points		1.7 to 3.2
Strength to Weight: Axial, points		14

Strength to Weight: Bending, points		5.7 to 8.7
Strength to Weight: Bending, points		30