Comparison
High Temperature Novolac Epoxy vs PETG
A side-by-side comparison of Epoxy Novolac Resin and Polyethylene Terephthalate Glycol.
Physical
Density
1.20-1.30 g/cm³
1.27 g/cm³
Water Absorption (24h)
0.1-0.3 %
0.13 %
Transparency
Amber to Brown
Transparent
Shrinkage
2-3 %
0.2 – 0.5 %
Mechanical
Young's Modulus
3.0-4.5 GPa
2.1 GPa
Tensile Strength
60-95 MPa
50 MPa
Elongation at Break
2-5 %
120 %
Impact Strength (Izod)
8-20 J/m
100 J/m
Flexural Strength
—
70 MPa
Thermal
Glass Transition Temperature
120-200 °C
80 °C
Melting Point
N/A
—
Continuous Service Temperature
150-200 °C
65 °C
Heat Deflection Temperature
120-180 °C
70 °C
CTE
—
68 × 10⁻⁶ /K
Electrical
Dielectric Constant
3.5-4.5
3.3
Volume Resistivity
10^13-10^15 Ohm-cm
10¹⁴ Ω·cm
Dielectric Strength
18-28 kV/mm
—
Chemical resistance
Acids
Excellent resistance
Good
Bases
Good resistance
Fair
Solvents
Resistant to many solvents
—
UV Resistance
Moderate without additives
Fair
Alcohols
—
Good
Oils
—
Good
Sustainability
Recyclability
Difficult
Recyclable
Recycling Code
N/A
1
Carbon Footprint
Moderate to High
~2.7 kg CO₂e / kg
Bio-based Content
—
0 %