Comparison
High Temperature Thermoset Polyimide vs PETG
A side-by-side comparison of Thermoset Polyimide Resin and Polyethylene Terephthalate Glycol.
Physical
Density
1.30-1.45 g/cm³
1.27 g/cm³
Water Absorption (24h)
0.5-1.5 %
0.13 %
Transparency
Amber to Brown (often opaque)
Transparent
Shrinkage
1-3 %
0.2 – 0.5 %
Mechanical
Young's Modulus
3.0-6.0 GPa
2.1 GPa
Tensile Strength
80-150 MPa
50 MPa
Elongation at Break
2-10 %
120 %
Impact Strength (Izod)
15-30 J/m
100 J/m
Flexural Strength
—
70 MPa
Thermal
Glass Transition Temperature
250-400 °C
80 °C
Melting Point
N/A (degrades)
—
Continuous Service Temperature
250-350 °C
65 °C
Heat Deflection Temperature
200-300 °C
70 °C
CTE
—
68 × 10⁻⁶ /K
Electrical
Dielectric Constant
3.0-4.0
3.3
Volume Resistivity
10^15-10^17 Ohm-cm
10¹⁴ Ω·cm
Dielectric Strength
15-25 kV/mm
—
Chemical resistance
Acids
Good resistance
Good
Bases
Moderate resistance
Fair
Solvents
Resistant to most organic solvents
—
UV Resistance
Good
Fair
Alcohols
—
Good
Oils
—
Good
Sustainability
Recyclability
Difficult
Recyclable
Recycling Code
N/A
1
Carbon Footprint
High
~2.7 kg CO₂e / kg
Bio-based Content
—
0 %