Comparison
Mycelium Composite vs PEEK
A side-by-side comparison of Mycelium Composite Material, Structural Grade V and Polyether Ether Ketone.
Physical
Density
0.1 - 0.5 g/cm³
1.32 g/cm³
Water Absorption (24h)
2.0-5.0 %
0.15 %
Transparency
Opaque
Opaque (amber)
Shrinkage
Varies with growth process
1.1 – 1.4 %
Mechanical
Young's Modulus
Highly variable (depends on density and substrate)
3.6 GPa
Tensile Strength
Highly variable
100 MPa
Elongation at Break
Highly variable
50 %
Impact Strength (Izod)
Highly variable
55 J/m
Flexural Strength
—
170 MPa
Thermal
Glass Transition Temperature
Not applicable (natural material)
143 °C
Melting Point
None (decomposes)
343 °C
Continuous Service Temperature
60 °C
260 °C
Heat Deflection Temperature
Not applicable
160 °C
Electrical
Dielectric Constant
Variable
3.2
Volume Resistivity
Variable
10¹⁶ Ω·cm
Dielectric Strength
Low to moderate
—
Chemical resistance
Acids
Sensitive
Excellent
Bases
Sensitive
Excellent
Solvents
Resistant to most common solvents but can be degraded by strong acids/bases
Excellent
UV Resistance
Poor
Fair
Hydrolysis (steam)
—
Excellent
Sustainability
Recyclability
Biodegradable (compost)
Recyclable (specialty)
Recycling Code
7 (Other)
7
Carbon Footprint
Negative to very low (utilizes waste streams, sequesters carbon)
~30 kg CO₂e / kg