Comparison
General Purpose Styrene-Butadiene-Styrene TPE vs PEEK
A side-by-side comparison of Styrene-Butadiene-Styrene (SBS) block copolymer and Polyether Ether Ketone.
Physical
Density
0.91 - 0.95 g/cm³
1.32 g/cm³
Water Absorption (24h)
0.3 %
0.15 %
Transparency
Opaque
Opaque (amber)
Shrinkage
1.0 - 2.0 %
1.1 – 1.4 %
Mechanical
Young's Modulus
0.001 - 0.02 GPa
3.6 GPa
Tensile Strength
2 - 7 MPa
100 MPa
Elongation at Break
500 - 900 %
50 %
Impact Strength (Izod)
Poor to Fair
55 J/m
Flexural Strength
—
170 MPa
Thermal
Glass Transition Temperature
-55 to -50 °C
143 °C
Melting Point
N/A (softening point around 80-100 °C)
343 °C
Continuous Service Temperature
-40 to 70 °C
260 °C
Heat Deflection Temperature
N/A
160 °C
Electrical
Dielectric Constant
2.6 - 3.0
3.2
Volume Resistivity
10^14 - 10^16 Ohm-cm
10¹⁶ Ω·cm
Dielectric Strength
15 - 25 kV/mm
—
Chemical resistance
Acids
Good
Excellent
Bases
Good
Excellent
Solvents
Resists water, dilute acids/bases; dissolves in aromatic and chlorinated hydrocarbons
Excellent
UV Resistance
Poor
Fair
Hydrolysis (steam)
—
Excellent
Sustainability
Recyclability
Limited (often blended)
Recyclable (specialty)
Recycling Code
7 (Other)
7
Carbon Footprint
Moderate
~30 kg CO₂e / kg