PPE vs. PTFE

Both PPE and PTFE 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 PPE and the bottom bar is PTFE.

Polyphenylene Ether (PPE)Polytetrafluoroethylene (PTFE)

Metric UnitsUS Customary Units

Mechanical Properties

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

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

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

Thermal Properties

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

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

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

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

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

Electrical Properties

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

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

Otherwise Unclassified Properties

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

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

Common Calculations

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

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