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PEEK vs. PPSU

Both PEEK and PPSU are thermoplastics. There are 26 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

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

Metric UnitsUS Customary Units

Mechanical Properties

Compressive (Crushing) Strength, MPa 120 to 300
140
Elastic (Young's, Tensile) Modulus, GPa 4.0 to 24
3.6
Elongation at Break, % 1.6 to 43
26
Flexural Modulus, GPa 3.8 to 19
4.7
Flexural Strength, MPa 150 to 330
130
Impact Strength: Notched Izod, J/m 78 to 120
80
Rockwell R Hardness 120
130
Tensile Strength: Ultimate (UTS), MPa 97 to 200
95

Thermal Properties

Glass Transition Temperature, °C 240
220
Heat Deflection Temperature At 1.82 MPa (264 psi), °C 160 to 300
210
Maximum Temperature: Autoignition, °C 600
580
Maximum Temperature: Decomposition, °C 570
560
Maximum Temperature: Mechanical, °C 330
160
Specific Heat Capacity, J/kg-K 1390 to 1700
970
Thermal Conductivity, W/m-K 0.25 to 0.93
0.24
Thermal Expansion, µm/m-K 15 to 52
45

Electrical Properties

Electrical Resistivity Order of Magnitude, 10x Ω-m 3.0 to 14
14

Otherwise Unclassified Properties

Density, g/cm3 1.3 to 1.5
1.4
Limiting Oxygen Index (LOI), % 38
38
Water Absorption After 24 Hours, % 0.060 to 0.3
0.44

Common Calculations

Stiffness to Weight: Axial, points 1.5 to 10
1.4
Stiffness to Weight: Bending, points 36 to 73
36
Strength to Weight: Axial, points 20 to 41
19
Strength to Weight: Bending, points 36 to 55
33
Thermal Diffusivity, mm2/s 0.1 to 0.51
0.17
Thermal Shock Resistance, points 34 to 57
42