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PPS vs. Unfilled PEEK

Both PPS and unfilled PEEK are thermoplastics. There are 15 material properties with values for both materials. Properties with values for just one material (21, in this case) are not shown.

For each property being compared, the top bar is PPS and the bottom bar is unfilled PEEK.

Metric UnitsUS Customary Units

Mechanical Properties

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

Thermal Properties

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

Otherwise Unclassified Properties

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

Common Calculations

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