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PPS vs. PEEK

Both PPS and PEEK are thermoplastics. There are 15 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 PPS and the bottom bar is PEEK.

Metric UnitsUS Customary Units

Mechanical Properties

Compressive (Crushing) Strength, MPa 95 to 160
120 to 300
Elongation at Break, % 2.5 to 11
1.6 to 43
Flexural Modulus, GPa 13 to 17
3.8 to 19
Flexural Strength, MPa 120 to 190
150 to 330
Impact Strength: Notched Izod, J/m 21 to 80
78 to 120
Rockwell R Hardness 120
120
Tensile Strength: Ultimate (UTS), MPa 75 to 190
97 to 200

Thermal Properties

Glass Transition Temperature, °C 190 to 290
240
Heat Deflection Temperature At 1.82 MPa (264 psi), °C 130 to 260
160 to 300
Specific Heat Capacity, J/kg-K 910 to 1000
1390 to 1700
Thermal Expansion, µm/m-K 20 to 45
15 to 52

Otherwise Unclassified Properties

Density, g/cm3 1.3 to 1.7
1.3 to 1.5
Water Absorption At Saturation, % 0.060 to 0.1
0.22 to 0.5

Common Calculations

Strength to Weight: Axial, points 16 to 37
20 to 41
Strength to Weight: Bending, points 30 to 52
36 to 55