Comparison
PSU Standard vs PEEK
A side-by-side comparison of Polysulfone Standard and Polyether Ether Ketone.
Physical
Density
1.24-1.25 g/cm³
1.32 g/cm³
Water Absorption (24h)
0.5-0.8 %
0.15 %
Transparency
Transparent
Opaque (amber)
Shrinkage
0.5-0.8 %
1.1 – 1.4 %
Mechanical
Young's Modulus
2.0-2.5 GPa
3.6 GPa
Tensile Strength
60-75 MPa
100 MPa
Elongation at Break
50-100 %
50 %
Impact Strength (Izod)
10-15 kJ/m
55 J/m
Flexural Strength
—
170 MPa
Thermal
Glass Transition Temperature
170-185 °C
143 °C
Melting Point
N/A (amorphous)
343 °C
Continuous Service Temperature
130-160 °C
260 °C
Heat Deflection Temperature
150-170 °C (1.8 MPa)
160 °C
Electrical
Dielectric Constant
3.5-4.0
3.2
Volume Resistivity
10^13-10^15 Ohm-cm
10¹⁶ Ω·cm
Dielectric Strength
15-20 kV/mm
—
Chemical resistance
Acids
Good
Excellent
Bases
Fair
Excellent
Solvents
Fair (ketones, chlorinated hydrocarbons)
Excellent
UV Resistance
Fair
Fair
Hydrolysis (steam)
—
Excellent
Sustainability
Recyclability
Recyclable (difficult)
Recyclable (specialty)
Recycling Code
7 (Other)
7
Carbon Footprint
High
~30 kg CO₂e / kg