RPU vs. PET
RPU belongs to the thermoset plastics classification, while PET belongs to the thermoplastics. There are 12 material properties with values for both materials. Properties with values for just one material (15, in this case) are not shown.
For each property being compared, the top bar is RPU and the bottom bar is PET.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 2.2 | |
| 3.5 to 11 |
| Elongation at Break, % | 90 | |
| 2.5 to 70 |
| Flexural Modulus, GPa | 2.0 | |
| 8.3 to 14 |
| Tensile Strength: Ultimate (UTS), MPa | 60 | |
| 60 to 140 |
Thermal Properties
| Maximum Temperature: Autoignition, °C | 380 | |
| 410 |
| Maximum Temperature: Decomposition, °C | 270 | |
| 390 |
| Specific Heat Capacity, J/kg-K | 1750 | |
| 1000 to 1150 |
Otherwise Unclassified Properties
| Density, g/cm3 | 1.2 | |
| 1.4 to 1.6 |
Common Calculations
| Stiffness to Weight: Axial, points | 1.0 | |
| 1.2 to 4.4 |
| Stiffness to Weight: Bending, points | 36 | |
| 32 to 54 |
| Strength to Weight: Axial, points | 14 | |
| 12 to 27 |
| Strength to Weight: Bending, points | 28 | |
| 25 to 41 |