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PTFE vs. EPDM Rubber

PTFE belongs to the thermoplastics classification, while EPDM rubber belongs to the thermoset elastomers (rubber). There are 7 material properties with values for both materials. Properties with values for just one material (15, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.

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

Metric UnitsUS Customary Units

Material Properties

Density, g/cm3 2.1 to 2.3
1.0
Elongation at Break, % 75 to 300
400
Maximum Temperature: Mechanical, °C 260 to 270
160
Strength to Weight: Axial, points 1.7 to 3.2
3.6
Strength to Weight: Bending, points 5.7 to 8.7
12
Tensile Strength: Ultimate (UTS), MPa 13 to 25
13
Thermal Conductivity, W/m-K 0.24 to 0.65
0.2