Comparison
All-Purpose Chloroprene Rubber (Neoprene) vs PEEK
A side-by-side comparison of Chloroprene Rubber (Neoprene) and Polyether Ether Ketone.
Physical
Density
1.23 - 1.27 g/cm³
1.32 g/cm³
Water Absorption (24h)
0.4 - 0.8 %
0.15 %
Transparency
Opaque
Opaque (amber)
Shrinkage
1.5 - 2.5 %
1.1 – 1.4 %
Mechanical
Young's Modulus
0.02 - 0.06 GPa
3.6 GPa
Tensile Strength
10 - 25 MPa
100 MPa
Elongation at Break
200 - 600 %
50 %
Impact Strength (Izod)
N/A
55 J/m
Flexural Strength
—
170 MPa
Thermal
Glass Transition Temperature
-40 to -50 °C
143 °C
Melting Point
N/A
343 °C
Continuous Service Temperature
-30 to 100 °C
260 °C
Heat Deflection Temperature
N/A
160 °C
Electrical
Dielectric Constant
6.0 - 7.0
3.2
Volume Resistivity
10^9 - 10^11 Ohm-cm
10¹⁶ Ω·cm
Dielectric Strength
15 - 25 kV/mm
—
Chemical resistance
Acids
Good
Excellent
Bases
Good
Excellent
Solvents
Moderate resistance to oils and fuels; swells in aromatic and chlorinated hydrocarbons
Excellent
UV Resistance
Good
Fair
Hydrolysis (steam)
—
Excellent
Sustainability
Recyclability
Limited
Recyclable (specialty)
Recycling Code
N/A
7
Carbon Footprint
Moderate
~30 kg CO₂e / kg