Comparison
EVOH 44 mol% Barrier vs PEEK
A side-by-side comparison of Ethylene Vinyl Alcohol Copolymer (44 mol% VA) for Barrier Applications and Polyether Ether Ketone.
Physical
Density
1.18-1.22 g/cm³
1.32 g/cm³
Water Absorption (24h)
4-6 % (highly hygroscopic)
0.15 %
Transparency
Good
Opaque (amber)
Shrinkage
1-3 %
1.1 – 1.4 %
Mechanical
Young's Modulus
1.5-2.5 GPa
3.6 GPa
Tensile Strength
40-55 MPa
100 MPa
Elongation at Break
15-30 %
50 %
Impact Strength (Izod)
50-100 J/m
55 J/m
Flexural Strength
—
170 MPa
Thermal
Glass Transition Temperature
45-55 °C
143 °C
Melting Point
170-180 °C
343 °C
Continuous Service Temperature
50-60 °C
260 °C
Heat Deflection Temperature
50-60 °C
160 °C
Electrical
Dielectric Constant
3.5-4.5
3.2
Volume Resistivity
10¹⁰-10¹² Ω⋅cm
10¹⁶ Ω·cm
Dielectric Strength
15-25 kV/mm
—
Chemical resistance
Acids
Good resistance
Excellent
Bases
Good resistance
Excellent
Solvents
Insoluble in most common solvents, but sensitive to moisture
Excellent
UV Resistance
Poor
Fair
Hydrolysis (steam)
—
Excellent
Sustainability
Recyclability
Challenging due to multilayer structures
Recyclable (specialty)
Recycling Code
Depends on multilayer
7
Carbon Footprint
Moderate
~30 kg CO₂e / kg