Comparison
Alkyd Coating Resin vs PLA
A side-by-side comparison of Alkyd Resin and Polylactic Acid.
Physical
Density
1.10-1.25 g/cm³
1.24 g/cm³
Water Absorption (24h)
0.3-1.0 %
0.5 %
Transparency
Amber to Yellow
Semi-transparent
Shrinkage
N/A (occurs during drying)
0.3 – 0.5 %
Mechanical
Young's Modulus
0.5-1.5 GPa (as film)
3.5 GPa
Tensile Strength
20-40 MPa (as film)
50 – 65 MPa
Elongation at Break
5-20 % (as film)
6 %
Impact Strength (Izod)
N/A
16 J/m
Flexural Strength
—
80 MPa
Thermal
Glass Transition Temperature
Variable (depends on formulation)
60 °C
Melting Point
N/A
150 – 160 °C
Continuous Service Temperature
60-100 °C
45 °C
Heat Deflection Temperature
N/A
55 °C
Electrical
Dielectric Constant
3.0-4.0
3.0
Volume Resistivity
10^12-10^14 Ohm-cm
10¹⁴ Ω·cm
Dielectric Strength
15-25 kV/mm
—
Chemical resistance
Acids
Moderate resistance
Fair
Bases
Moderate resistance
Poor
Solvents
Resistant to hydrocarbons, swells in polar solvents
—
UV Resistance
Good
Poor
Alcohols
—
Fair
Hydrolysis
—
Poor
Sustainability
Recyclability
Difficult
Industrially compostable
Recycling Code
N/A
7
Carbon Footprint
Moderate
~1.6 kg CO₂e / kg
Bio-based Content
—
100 %