Thermoset PI vs. PETG
Thermoset PI belongs to the thermoset plastics classification, while PETG belongs to the thermoplastics. There are 17 material properties with values for both materials. Properties with values for just one material (17, in this case) are not shown.
For each property being compared, the top bar is thermoset PI and the bottom bar is PETG.
Metric UnitsUS Customary Units
Mechanical Properties
| Compressive (Crushing) Strength, MPa | 120 to 210 | |
| 55 |
| Flexural Modulus, GPa | 3.1 to 4.8 | |
| 2.1 |
| Flexural Strength, MPa | 60 to 100 | |
| 77 |
| Impact Strength: Notched Izod, J/m | 21 to 43 | |
| 77 |
| Tensile Strength: Ultimate (UTS), MPa | 37 to 81 | |
| 53 |
Thermal Properties
| Glass Transition Temperature, °C | 360 | |
| 81 |
| Heat Deflection Temperature At 1.82 MPa (264 psi), °C | 370 | |
| 69 |
| Specific Heat Capacity, J/kg-K | 1130 | |
| 1200 |
| Thermal Conductivity, W/m-K | 0.29 to 1.7 | |
| 0.29 |
| Thermal Expansion, µm/m-K | 38 to 54 | |
| 68 |
Electrical Properties
| Dielectric Constant (Relative Permittivity) At 1 MHz | 3.1 | |
| 2.4 |
| Dielectric Strength (Breakdown Potential), kV/mm | 20 | |
| 16 |
Otherwise Unclassified Properties
| Density, g/cm3 | 1.4 to 1.6 | |
| 1.3 |
| Water Absorption After 24 Hours, % | 0.14 to 0.24 | |
| 0.2 |
Common Calculations
| Strength to Weight: Axial, points | 6.5 to 16 | |
| 12 |
| Strength to Weight: Bending, points | 16 to 30 | |
| 25 |
| Thermal Diffusivity, mm2/s | 0.18 to 0.95 | |
| 0.19 |