Comparison

Low Dielectric Cyanate Ester vs PEEK

A side-by-side comparison of Cyanate Ester Resin and Polyether Ether Ketone.

Physical

Density
1.15-1.25 g/cm³
1.32 g/cm³
Water Absorption (24h)
0.1-0.3 %
0.15 %
Transparency
Clear to Light Amber
Opaque (amber)
Shrinkage
1-2 %
1.1 – 1.4 %

Mechanical

Young's Modulus
3.0-4.0 GPa
3.6 GPa
Tensile Strength
60-90 MPa
100 MPa
Elongation at Break
3-6 %
50 %
Impact Strength (Izod)
15-25 J/m
55 J/m
Flexural Strength
170 MPa

Thermal

Glass Transition Temperature
180-250 °C
143 °C
Melting Point
N/A
343 °C
Continuous Service Temperature
150-220 °C
260 °C
Heat Deflection Temperature
160-230 °C
160 °C

Electrical

Dielectric Constant
2.8-3.2
3.2
Volume Resistivity
10^15-10^17 Ohm-cm
10¹⁶ Ω·cm
Dielectric Strength
20-28 kV/mm

Chemical resistance

Acids
Good resistance
Excellent
Bases
Good resistance
Excellent
Solvents
Resistant to most organic solvents
Excellent
UV Resistance
Moderate
Fair
Hydrolysis (steam)
Excellent

Sustainability

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