Comparison

Oil-Resistant Nitrile Butadiene Rubber vs PEEK

A side-by-side comparison of Nitrile Butadiene Rubber (Oil-Resistant) and Polyether Ether Ketone.

Physical

Density
0.95 - 1.05 g/cm³
1.32 g/cm³
Water Absorption (24h)
0.2 - 0.5 %
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
300 - 600 %
50 %
Impact Strength (Izod)
N/A
55 J/m
Flexural Strength
170 MPa

Thermal

Glass Transition Temperature
-40 to -20 °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
3.5 - 4.0
3.2
Volume Resistivity
10^10 - 10^12 Ohm-cm
10¹⁶ Ω·cm
Dielectric Strength
10 - 15 kV/mm

Chemical resistance

Acids
Good
Excellent
Bases
Good
Excellent
Solvents
Excellent resistance to aliphatic hydrocarbons, oils, and fuels
Excellent
UV Resistance
Fair
Fair
Hydrolysis (steam)
Excellent

Sustainability

Recyclability
Limited
Recyclable (specialty)
Recycling Code
N/A
7
Carbon Footprint
Moderate
~30 kg CO₂e / kg