Silicone Plastic vs. PMMA
Silicone plastic belongs to the thermoset plastics classification, while PMMA belongs to the thermoplastics. 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 silicone plastic and the bottom bar is PMMA.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 9.0 | |
| 3.2 |
| Tensile Strength: Ultimate (UTS), MPa | 38 | |
| 71 |
Thermal Properties
| Glass Transition Temperature, °C | 200 | |
| 110 |
| Maximum Temperature: Decomposition, °C | 480 | |
| 360 |
| Specific Heat Capacity, J/kg-K | 850 | |
| 1260 |
| Thermal Conductivity, W/m-K | 0.35 | |
| 0.19 |
| Thermal Expansion, µm/m-K | 35 | |
| 76 |
Electrical Properties
| Dielectric Strength (Breakdown Potential), kV/mm | 30 | |
| 30 |
Otherwise Unclassified Properties
| Density, g/cm3 | 1.9 | |
| 1.2 |
Common Calculations
| Stiffness to Weight: Axial, points | 2.6 | |
| 1.5 |
| Stiffness to Weight: Bending, points | 36 | |
| 42 |
| Strength to Weight: Axial, points | 5.5 | |
| 17 |
| Strength to Weight: Bending, points | 13 | |
| 32 |
| Thermal Diffusivity, mm2/s | 0.22 | |
| 0.13 |
| Thermal Shock Resistance, points | 8.5 | |
| 21 |