Thermoset PI vs. RPU
Both thermoset PI and RPU are thermoset plastics. There are 15 material properties with values for both materials. Properties with values for just one material (14, in this case) are not shown.
For each property being compared, the top bar is thermoset PI and the bottom bar is RPU.
Metric UnitsUS Customary Units
Mechanical Properties
| Elongation at Break, % | 2.0 to 5.9 | |
| 90 |
| Flexural Modulus, GPa | 3.1 to 4.8 | |
| 2.0 |
| Flexural Strength, MPa | 60 to 100 | |
| 83 |
| Tensile Strength: Ultimate (UTS), MPa | 37 to 81 | |
| 60 |
Thermal Properties
| Maximum Temperature: Autoignition, °C | 380 | |
| 380 |
| Maximum Temperature: Decomposition, °C | 330 | |
| 270 |
| Specific Heat Capacity, J/kg-K | 1130 | |
| 1750 |
| Thermal Conductivity, W/m-K | 0.29 to 1.7 | |
| 0.19 |
| Thermal Expansion, µm/m-K | 38 to 54 | |
| 63 |
Electrical Properties
| Dielectric Strength (Breakdown Potential), kV/mm | 20 | |
| 19 |
| Electrical Resistivity Order of Magnitude, 10x Ω-m | 15 | |
| 13 |
Otherwise Unclassified Properties
| Density, g/cm3 | 1.4 to 1.6 | |
| 1.2 |
Common Calculations
| Strength to Weight: Axial, points | 6.5 to 16 | |
| 14 |
| Strength to Weight: Bending, points | 16 to 30 | |
| 28 |
| Thermal Diffusivity, mm2/s | 0.18 to 0.95 | |
| 0.090 |