Comparison
Standard Natural Rubber vs PEEK
A side-by-side comparison of Standard Natural Rubber and Polyether Ether Ketone.
Physical
Density
0.92 g/cm³
1.32 g/cm³
Water Absorption (24h)
0.3 %
0.15 %
Transparency
Opaque
Opaque (amber)
Shrinkage
1.5 %
1.1 – 1.4 %
Mechanical
Young's Modulus
0.01 - 0.05 GPa
3.6 GPa
Tensile Strength
20 - 30 MPa
100 MPa
Elongation at Break
600 - 800 %
50 %
Impact Strength (Izod)
N/A
55 J/m
Flexural Strength
—
170 MPa
Thermal
Glass Transition Temperature
-70 °C
143 °C
Melting Point
N/A
343 °C
Continuous Service Temperature
-40 to 80 °C
260 °C
Heat Deflection Temperature
N/A
160 °C
Electrical
Dielectric Constant
2.5 - 3.0
3.2
Volume Resistivity
10^13 - 10^14 Ohm-cm
10¹⁶ Ω·cm
Dielectric Strength
15 - 25 kV/mm
—
Chemical resistance
Acids
Poor
Excellent
Bases
Good
Excellent
Solvents
Poor (swells in aliphatic and aromatic hydrocarbons)
Excellent
UV Resistance
Poor
Fair
Hydrolysis (steam)
—
Excellent
Sustainability
Recyclability
Limited
Recyclable (specialty)
Recycling Code
N/A
7
Carbon Footprint
Moderate (depends on cultivation practices)
~30 kg CO₂e / kg