Comparison
High Acrylonitrile Nitrile Butadiene Rubber (NBR) vs PEEK
A side-by-side comparison of Nitrile Butadiene Rubber (NBR) - High Acrylonitrile Content and Polyether Ether Ketone.
Physical
Density
1.00 - 1.05 g/cm³
1.32 g/cm³
Water Absorption (24h)
0.1 - 0.3 %
0.15 %
Transparency
Opaque
Opaque (amber)
Shrinkage
1.0 - 2.0 %
1.1 – 1.4 %
Mechanical
Young's Modulus
0.03 - 0.07 GPa
3.6 GPa
Tensile Strength
15 - 25 MPa
100 MPa
Elongation at Break
200 - 400 %
50 %
Impact Strength (Izod)
N/A
55 J/m
Flexural Strength
—
170 MPa
Thermal
Glass Transition Temperature
-15 to -5 °C
143 °C
Melting Point
N/A
343 °C
Continuous Service Temperature
-10 to 120 °C
260 °C
Heat Deflection Temperature
N/A
160 °C
Electrical
Dielectric Constant
3.8 - 4.5
3.2
Volume Resistivity
10^9 - 10^11 Ohm-cm
10¹⁶ Ω·cm
Dielectric Strength
8 - 12 kV/mm
—
Chemical resistance
Acids
Good
Excellent
Bases
Good
Excellent
Solvents
Excellent resistance to aliphatic hydrocarbons, fuels, oils, and many solvents
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