Comparison
Lignin Filler vs Polycarbonate
A side-by-side comparison of Lignin, Filler Grade S and Polycarbonate.
Physical
Density
1.2-1.4 g/cm³
1.20 g/cm³
Water Absorption (24h)
2.0-5.0 %
0.15 %
Transparency
Opaque
Transparent (88% light transmission)
Shrinkage
Varies with matrix
0.5 – 0.8 %
Mechanical
Young's Modulus
Highly variable (depends on source and processing)
2.3 – 2.4 GPa
Tensile Strength
Highly variable
60 – 70 MPa
Elongation at Break
Highly variable
100 – 150 %
Impact Strength (Izod)
Highly variable
600 – 900 J/m
Flexural Strength
—
90 – 100 MPa
Hardness (Rockwell M)
—
70
Thermal
Glass Transition Temperature
100-150 °C
147 °C
Melting Point
None (degrades)
—
Continuous Service Temperature
70 °C
115 – 130 °C
Heat Deflection Temperature
Varies with matrix
130 – 140 °C
Thermal Conductivity
—
0.20 W/m·K
CTE
—
65 – 70 × 10⁻⁶ /K
Electrical
Dielectric Constant
3.5-4.5
2.9 – 3.0
Volume Resistivity
10⁹-10¹² Ω·cm
10¹⁶ Ω·cm
Dielectric Strength
10-20 kV/mm
15 kV/mm
Chemical resistance
Acids
Moderate resistance
—
Bases
Poor resistance
Poor
Solvents
Soluble in some organic solvents like DMSO, dioxin
—
UV Resistance
Good (inherent)
Poor (unless coated)
Acids (dilute)
—
Good
Alcohols
—
Fair
Oils
—
Good
Gasoline
—
Fair
Acetone
—
Poor (attacks)
Sustainability
Recyclability
Biodegradable (if not compounded with non-biodegradable matrix)
Recyclable
Recycling Code
7 (Other)
7
Carbon Footprint
Negative to very low (utilizes byproduct)
~5 kg CO₂e / kg
Bio-based Content
—
0 – 50 % (bio grades)