Comparison
High Temperature Thermoset Polyimide vs PEEK
A side-by-side comparison of Thermoset Polyimide Resin and Polyether Ether Ketone.
Physical
Density
1.30-1.45 g/cm³
1.32 g/cm³
Water Absorption (24h)
0.5-1.5 %
0.15 %
Transparency
Amber to Brown (often opaque)
Opaque (amber)
Shrinkage
1-3 %
1.1 – 1.4 %
Mechanical
Young's Modulus
3.0-6.0 GPa
3.6 GPa
Tensile Strength
80-150 MPa
100 MPa
Elongation at Break
2-10 %
50 %
Impact Strength (Izod)
15-30 J/m
55 J/m
Flexural Strength
—
170 MPa
Thermal
Glass Transition Temperature
250-400 °C
143 °C
Melting Point
N/A (degrades)
343 °C
Continuous Service Temperature
250-350 °C
260 °C
Heat Deflection Temperature
200-300 °C
160 °C
Electrical
Dielectric Constant
3.0-4.0
3.2
Volume Resistivity
10^15-10^17 Ohm-cm
10¹⁶ Ω·cm
Dielectric Strength
15-25 kV/mm
—
Chemical resistance
Acids
Good resistance
Excellent
Bases
Moderate resistance
Excellent
Solvents
Resistant to most organic solvents
Excellent
UV Resistance
Good
Fair
Hydrolysis (steam)
—
Excellent
Sustainability
Recyclability
Difficult
Recyclable (specialty)
Recycling Code
N/A
7
Carbon Footprint
High
~30 kg CO₂e / kg