RPU vs. LDPE
RPU belongs to the thermoset plastics classification, while LDPE belongs to the thermoplastics. There are 15 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.
For each property being compared, the top bar is RPU and the bottom bar is LDPE.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 2.2 | |
| 0.3 |
| Tensile Strength: Ultimate (UTS), MPa | 60 | |
| 7.0 |
Thermal Properties
| Maximum Temperature: Autoignition, °C | 380 | |
| 380 |
| Maximum Temperature: Decomposition, °C | 270 | |
| 400 |
| Specific Heat Capacity, J/kg-K | 1750 | |
| 2300 |
| Thermal Conductivity, W/m-K | 0.19 | |
| 0.36 |
| Thermal Expansion, µm/m-K | 63 | |
| 220 |
| Vicat Softening Temperature, °C | 120 | |
| 50 |
Otherwise Unclassified Properties
| Density, g/cm3 | 1.2 | |
| 0.92 |
Common Calculations
| Stiffness to Weight: Axial, points | 1.0 | |
| 0.18 |
| Stiffness to Weight: Bending, points | 36 | |
| 24 |
| Strength to Weight: Axial, points | 14 | |
| 2.1 |
| Strength to Weight: Bending, points | 28 | |
| 8.8 |
| Thermal Diffusivity, mm2/s | 0.090 | |
| 0.17 |
| Thermal Shock Resistance, points | 31 | |
| 7.6 |