Comparison
Automotive Hose Grade Ethylene Propylene Diene Monomer (EPDM) vs PEEK
A side-by-side comparison of Ethylene Propylene Diene Monomer (EPDM) - Automotive Hose Grade and Polyether Ether Ketone.
Physical
Density
0.88 - 0.92 g/cm³
1.32 g/cm³
Water Absorption (24h)
0.2 %
0.15 %
Transparency
Opaque
Opaque (amber)
Shrinkage
1.2 - 2.0 %
1.1 – 1.4 %
Mechanical
Young's Modulus
0.015 - 0.03 GPa
3.6 GPa
Tensile Strength
8 - 18 MPa
100 MPa
Elongation at Break
400 - 600 %
50 %
Impact Strength (Izod)
N/A
55 J/m
Flexural Strength
—
170 MPa
Thermal
Glass Transition Temperature
-55 to -45 °C
143 °C
Melting Point
N/A
343 °C
Continuous Service Temperature
-40 to 150 °C
260 °C
Heat Deflection Temperature
N/A
160 °C
Electrical
Dielectric Constant
2.4 - 2.9
3.2
Volume Resistivity
10^14 - 10^16 Ohm-cm
10¹⁶ Ω·cm
Dielectric Strength
25 - 35 kV/mm
—
Chemical resistance
Acids
Good
Excellent
Bases
Good
Excellent
Solvents
Resists water, steam, antifreeze; Poor resistance to hydrocarbon oils
Excellent
UV Resistance
Excellent
Fair
Hydrolysis (steam)
—
Excellent
Sustainability
Recyclability
Limited
Recyclable (specialty)
Recycling Code
N/A
7
Carbon Footprint
Moderate
~30 kg CO₂e / kg