Comparison
POM Homopolymer vs PEEK
A side-by-side comparison of Polyoxymethylene Homopolymer and Polyether Ether Ketone.
Physical
Density
1.41-1.42 g/cm³
1.32 g/cm³
Water Absorption (24h)
0.2-0.5 %
0.15 %
Transparency
Opaque
Opaque (amber)
Shrinkage
1.0-2.5 %
1.1 – 1.4 %
Mechanical
Young's Modulus
2.8-3.8 GPa
3.6 GPa
Tensile Strength
60-80 MPa
100 MPa
Elongation at Break
15-40 %
50 %
Impact Strength (Izod)
70-100 kJ/m
55 J/m
Flexural Strength
—
170 MPa
Thermal
Glass Transition Temperature
-50 to -10 °C
143 °C
Melting Point
170-175 °C
343 °C
Continuous Service Temperature
80-100 °C
260 °C
Heat Deflection Temperature
100-140 °C (1.8 MPa)
160 °C
Electrical
Dielectric Constant
3.7-4.2
3.2
Volume Resistivity
10^12-10^14 Ohm-cm
10¹⁶ Ω·cm
Dielectric Strength
15-25 kV/mm
—
Chemical resistance
Acids
Fair
Excellent
Bases
Poor
Excellent
Solvents
Excellent (oils, greases, hydrocarbons)
Excellent
UV Resistance
Fair (requires stabilization)
Fair
Hydrolysis (steam)
—
Excellent
Sustainability
Recyclability
Recyclable
Recyclable (specialty)
Recycling Code
7 (Other)
7
Carbon Footprint
Moderate
~30 kg CO₂e / kg