Comparison
POM Homopolymer vs PETG
A side-by-side comparison of Polyoxymethylene Homopolymer and Polyethylene Terephthalate Glycol.
Physical
Density
1.41-1.42 g/cm³
1.27 g/cm³
Water Absorption (24h)
0.2-0.5 %
0.13 %
Transparency
Opaque
Transparent
Shrinkage
1.0-2.5 %
0.2 – 0.5 %
Mechanical
Young's Modulus
2.8-3.8 GPa
2.1 GPa
Tensile Strength
60-80 MPa
50 MPa
Elongation at Break
15-40 %
120 %
Impact Strength (Izod)
70-100 kJ/m
100 J/m
Flexural Strength
—
70 MPa
Thermal
Glass Transition Temperature
-50 to -10 °C
80 °C
Melting Point
170-175 °C
—
Continuous Service Temperature
80-100 °C
65 °C
Heat Deflection Temperature
100-140 °C (1.8 MPa)
70 °C
CTE
—
68 × 10⁻⁶ /K
Electrical
Dielectric Constant
3.7-4.2
3.3
Volume Resistivity
10^12-10^14 Ohm-cm
10¹⁴ Ω·cm
Dielectric Strength
15-25 kV/mm
—
Chemical resistance
Acids
Fair
Good
Bases
Poor
Fair
Solvents
Excellent (oils, greases, hydrocarbons)
—
UV Resistance
Fair (requires stabilization)
Fair
Alcohols
—
Good
Oils
—
Good
Sustainability
Recyclability
Recyclable
Recyclable
Recycling Code
7 (Other)
1
Carbon Footprint
Moderate
~2.7 kg CO₂e / kg
Bio-based Content
—
0 %