Comparison
PC/PBT Blend vs PEEK
A side-by-side comparison of Polycarbonate / Polybutylene Terephthalate Blend and Polyether Ether Ketone.
Physical
Density
1.20-1.30 g/cm³
1.32 g/cm³
Water Absorption (24h)
0.2-0.4 %
0.15 %
Transparency
Opaque
Opaque (amber)
Shrinkage
0.5-1.0 %
1.1 – 1.4 %
Mechanical
Young's Modulus
2.2-3.5 GPa
3.6 GPa
Tensile Strength
50-65 MPa
100 MPa
Elongation at Break
80-150 %
50 %
Impact Strength (Izod)
60-120 kJ/m
55 J/m
Flexural Strength
—
170 MPa
Thermal
Glass Transition Temperature
100-120 °C
143 °C
Melting Point
N/A (amorphous/semi-crystalline mix)
343 °C
Continuous Service Temperature
80-100 °C
260 °C
Heat Deflection Temperature
80-100 °C (1.8 MPa)
160 °C
Electrical
Dielectric Constant
2.8-3.3
3.2
Volume Resistivity
10^13-10^15 Ohm-cm
10¹⁶ Ω·cm
Dielectric Strength
18-24 kV/mm
—
Chemical resistance
Acids
Good
Excellent
Bases
Fair
Excellent
Solvents
Good
Excellent
UV Resistance
Fair
Fair
Hydrolysis (steam)
—
Excellent
Sustainability
Recyclability
Recyclable
Recyclable (specialty)
Recycling Code
7 (Other)
7
Carbon Footprint
Moderate
~30 kg CO₂e / kg