Comparison
Alkyd Coating Resin vs PETG
A side-by-side comparison of Alkyd Resin and Polyethylene Terephthalate Glycol.
Physical
Density
1.10-1.25 g/cm³
1.27 g/cm³
Water Absorption (24h)
0.3-1.0 %
0.13 %
Transparency
Amber to Yellow
Transparent
Shrinkage
N/A (occurs during drying)
0.2 – 0.5 %
Mechanical
Young's Modulus
0.5-1.5 GPa (as film)
2.1 GPa
Tensile Strength
20-40 MPa (as film)
50 MPa
Elongation at Break
5-20 % (as film)
120 %
Impact Strength (Izod)
N/A
100 J/m
Flexural Strength
—
70 MPa
Thermal
Glass Transition Temperature
Variable (depends on formulation)
80 °C
Melting Point
N/A
—
Continuous Service Temperature
60-100 °C
65 °C
Heat Deflection Temperature
N/A
70 °C
CTE
—
68 × 10⁻⁶ /K
Electrical
Dielectric Constant
3.0-4.0
3.3
Volume Resistivity
10^12-10^14 Ohm-cm
10¹⁴ Ω·cm
Dielectric Strength
15-25 kV/mm
—
Chemical resistance
Acids
Moderate resistance
Good
Bases
Moderate resistance
Fair
Solvents
Resistant to hydrocarbons, swells in polar solvents
—
UV Resistance
Good
Fair
Alcohols
—
Good
Oils
—
Good
Sustainability
Recyclability
Difficult
Recyclable
Recycling Code
N/A
1
Carbon Footprint
Moderate
~2.7 kg CO₂e / kg
Bio-based Content
—
0 %