Silicone Plastic vs. RTPU
Silicone plastic belongs to the thermoset plastics classification, while RTPU belongs to the thermoplastics. There are 15 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.
For each property being compared, the top bar is silicone plastic and the bottom bar is RTPU.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 9.0 | |
| 4.0 |
| Tensile Strength: Ultimate (UTS), MPa | 38 | |
| 75 |
Thermal Properties
| Maximum Temperature: Decomposition, °C | 480 | |
| 320 |
| Specific Heat Capacity, J/kg-K | 850 | |
| 1760 |
| Thermal Conductivity, W/m-K | 0.35 | |
| 0.6 |
| Thermal Expansion, µm/m-K | 35 | |
| 100 |
Electrical Properties
| Dielectric Strength (Breakdown Potential), kV/mm | 30 | |
| 24 |
| Electrical Resistivity Order of Magnitude, 10x Ω-m | 12 | |
| 14 |
Otherwise Unclassified Properties
| Density, g/cm3 | 1.9 | |
| 1.1 |
Common Calculations
| Stiffness to Weight: Axial, points | 2.6 | |
| 2.1 |
| Stiffness to Weight: Bending, points | 36 | |
| 50 |
| Strength to Weight: Axial, points | 5.5 | |
| 20 |
| Strength to Weight: Bending, points | 13 | |
| 38 |
| Thermal Diffusivity, mm2/s | 0.22 | |
| 0.32 |
| Thermal Shock Resistance, points | 8.5 | |
| 13 |