Comparison
High-Temperature Flexible Vinyl Methyl Silicone vs PA66
A side-by-side comparison of Vinyl Methyl Silicone Rubber (VMQ) and Polyamide 6,6 (Nylon).
Physical
Density
1.12 - 1.52 g/cm³
1.14 g/cm³
Water Absorption (24h)
0.1 - 0.5 %
1.2 %
Transparency
Opaque to Translucent
Opaque
Shrinkage
1.0 - 3.0 %
1.5 – 2.0 %
Mechanical
Young's Modulus
0.001 - 0.01 GPa
3.0 GPa (dry)
Tensile Strength
3 - 10 MPa
80 MPa
Elongation at Break
200 - 700 %
60 %
Impact Strength (Izod)
N/A
50 J/m
Flexural Strength
—
110 MPa
Thermal
Glass Transition Temperature
-100 to -50 °C
70 °C
Melting Point
N/A
255 – 265 °C
Continuous Service Temperature
-60 to 230 °C
100 – 120 °C
Heat Deflection Temperature
N/A
75 °C (unfilled)
Electrical
Dielectric Constant
2.8 - 3.0
4.0
Volume Resistivity
10^13 - 10^15 Ohm-cm
10¹² Ω·cm
Dielectric Strength
15 - 30 kV/mm
—
Chemical resistance
Acids
Poor
Poor
Bases
Poor
Good
Solvents
Poor resistance to hydrocarbon solvents; swells
—
UV Resistance
Excellent
Fair
Alcohols
—
Good
Oils & Fuels
—
Excellent
Sustainability
Recyclability
Very Limited
Recyclable
Recycling Code
N/A
7
Carbon Footprint
High (energy intensive production)
~7.4 kg CO₂e / kg
Bio-based Content
—
0 – 100 % (bio grades)