PPO vs. PTFE

Both PPO and PTFE are thermoplastics. There are 13 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.

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

Polyphenylene Oxide (PPO)Polytetrafluoroethylene (PTFE)

Metric UnitsUS Customary Units

Mechanical Properties

Elongation at Break, %		3.5 to 28
Elongation at Break, %		75 to 300

Flexural Modulus, GPa		2.5 to 8.6
Flexural Modulus, GPa		0.4 to 1.3

Flexural Strength, MPa		92 to 140
Flexural Strength, MPa		13 to 50

Tensile Strength: Ultimate (UTS), MPa		63 to 140
Tensile Strength: Ultimate (UTS), MPa		13 to 25

Thermal Properties

Heat Deflection Temperature At 1.82 MPa (264 psi), °C		120 to 140
Heat Deflection Temperature At 1.82 MPa (264 psi), °C		66 to 70

Maximum Temperature: Mechanical, °C		100 to 110
Maximum Temperature: Mechanical, °C		260 to 270

Thermal Expansion, µm/m-K		25 to 60
Thermal Expansion, µm/m-K		110 to 120

Electrical Properties

Electrical Resistivity Order of Magnitude, 10^x Ω-m		15
Electrical Resistivity Order of Magnitude, 10^x Ω-m		2.0 to 18

Otherwise Unclassified Properties

Density, g/cm³		1.1 to 1.4
Density, g/cm³		2.1 to 2.3

Limiting Oxygen Index (LOI), %		32
Limiting Oxygen Index (LOI), %		90

Water Absorption After 24 Hours, %		0.060 to 0.070
Water Absorption After 24 Hours, %		0.0093 to 0.050

Common Calculations

Strength to Weight: Axial, points		16 to 27
Strength to Weight: Axial, points		1.7 to 3.2

Strength to Weight: Bending, points		33 to 42
Strength to Weight: Bending, points		5.7 to 8.7