Comparison
Acrylic (PMMA) vs PEEK
A side-by-side comparison of Poly(methyl methacrylate) and Polyether Ether Ketone.
Physical
Density
1.18 g/cm³
1.32 g/cm³
Water Absorption (24h)
0.3 %
0.15 %
Transparency
Transparent (92%)
Opaque (amber)
Shrinkage
0.2 – 0.8 %
1.1 – 1.4 %
Mechanical
Young's Modulus
3.0 GPa
3.6 GPa
Tensile Strength
70 MPa
100 MPa
Flexural Strength
110 MPa
170 MPa
Impact Strength (Izod)
20 J/m
55 J/m
Elongation at Break
5 %
50 %
Thermal
Glass Transition Temperature
105 °C
143 °C
Continuous Service Temperature
80 °C
260 °C
Heat Deflection Temperature
95 °C
160 °C
Melting Point
—
343 °C
Electrical
Dielectric Constant
3.6
3.2
Volume Resistivity
10¹⁵ Ω·cm
10¹⁶ Ω·cm
Chemical resistance
Acids
Good
Excellent
Bases
Fair
Excellent
Alcohols
Poor
—
Acetone
Attacks
—
UV Resistance
Excellent
Fair
Solvents
—
Excellent
Hydrolysis (steam)
—
Excellent
Sustainability
Recyclability
Recyclable (chemical)
Recyclable (specialty)
Recycling Code
7
7
Carbon Footprint
~5.4 kg CO₂e / kg
~30 kg CO₂e / kg