Comparison
Styrenic Block Copolymer Commodity vs PA66
A side-by-side comparison of Styrenic Block Copolymers for Commodity Applications and Polyamide 6,6 (Nylon).
Physical
Density
0.90-1.00 g/cm³
1.14 g/cm³
Water Absorption (24h)
<0.1 %
1.2 %
Transparency
Translucent to opaque
Opaque
Shrinkage
1-3 %
1.5 – 2.0 %
Mechanical
Young's Modulus
0.01-0.05 GPa
3.0 GPa (dry)
Tensile Strength
5-15 MPa
80 MPa
Elongation at Break
300-800 %
60 %
Impact Strength (Izod)
No break (at room temp)
50 J/m
Flexural Strength
—
110 MPa
Thermal
Glass Transition Temperature
-60 to -40 °C
70 °C
Melting Point
N/A (softens)
255 – 265 °C
Continuous Service Temperature
50-70 °C
100 – 120 °C
Heat Deflection Temperature
N/A
75 °C (unfilled)
Electrical
Dielectric Constant
2.5-3.0
4.0
Volume Resistivity
10¹³-10¹⁵ Ω⋅cm
10¹² Ω·cm
Dielectric Strength
15-25 kV/mm
—
Chemical resistance
Acids
Good resistance
Poor
Bases
Good resistance
Good
Solvents
Excellent resistance to polar solvents; softened by aromatic and chlorinated hydrocarbons
—
UV Resistance
Poor (requires stabilization)
Fair
Alcohols
—
Good
Oils & Fuels
—
Excellent
Sustainability
Recyclability
Recyclable (often compounded)
Recyclable
Recycling Code
7 (Other) or depends on base polymer
7
Carbon Footprint
Moderate
~7.4 kg CO₂e / kg
Bio-based Content
—
0 – 100 % (bio grades)