Comparison
PHA Flexible Grade D vs PEEK
A side-by-side comparison of Polyhydroxyalkanoate, Flexible Grade D and Polyether Ether Ketone.
Physical
Density
1.20 g/cm³
1.32 g/cm³
Water Absorption (24h)
0.8 %
0.15 %
Transparency
Moderate
Opaque (amber)
Shrinkage
2.0 - 4.5 %
1.1 – 1.4 %
Mechanical
Young's Modulus
0.5 GPa
3.6 GPa
Tensile Strength
30 MPa
100 MPa
Elongation at Break
15.0 %
50 %
Impact Strength (Izod)
1.0 J/cm
55 J/m
Flexural Strength
—
170 MPa
Thermal
Glass Transition Temperature
-5 °C
143 °C
Melting Point
110-120 °C
343 °C
Continuous Service Temperature
40 °C
260 °C
Heat Deflection Temperature
35 °C
160 °C
Electrical
Dielectric Constant
3.0
3.2
Volume Resistivity
10¹¹ Ω·cm
10¹⁶ Ω·cm
Dielectric Strength
15 kV/mm
—
Chemical resistance
Acids
Good resistance
Excellent
Bases
Good resistance
Excellent
Solvents
Resistant to aliphatic hydrocarbons, but attacked by chlorinated and aromatic hydrocarbons
Excellent
UV Resistance
Moderate
Fair
Hydrolysis (steam)
—
Excellent
Sustainability
Recyclability
Biodegradable (soil, marine, compost)
Recyclable (specialty)
Recycling Code
7 (Other)
7
Carbon Footprint
Low
~30 kg CO₂e / kg