PS vs. PMP
Both PS and PMP are thermoplastics. There are 18 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.
For each property being compared, the top bar is PS and the bottom bar is PMP.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 1.9 to 2.9 | |
| 1.1 |
| Elongation at Break, % | 1.8 to 40 | |
| 30 |
| Impact Strength: Notched Izod, J/m | 19 to 45 | |
| 130 |
| Tensile Strength: Ultimate (UTS), MPa | 32 to 44 | |
| 24 |
Thermal Properties
| Glass Transition Temperature, °C | 100 | |
| 30 |
| Maximum Temperature: Mechanical, °C | 70 | |
| 140 |
| Specific Heat Capacity, J/kg-K | 1250 to 1400 | |
| 1750 |
| Thermal Conductivity, W/m-K | 0.14 to 0.22 | |
| 0.17 |
| Thermal Expansion, µm/m-K | 80 to 98 | |
| 120 |
Electrical Properties
| Dielectric Strength (Breakdown Potential), kV/mm | 18 to 20 | |
| 28 |
| Electrical Resistivity Order of Magnitude, 10x Ω-m | 14 to 15 | |
| 14 |
Otherwise Unclassified Properties
| Density, g/cm3 | 1.0 | |
| 0.83 |
Common Calculations
| Stiffness to Weight: Axial, points | 1.0 to 1.5 | |
| 0.74 |
| Stiffness to Weight: Bending, points | 40 to 45 | |
| 41 |
| Strength to Weight: Axial, points | 8.5 to 12 | |
| 8.0 |
| Strength to Weight: Bending, points | 22 to 26 | |
| 22 |
| Thermal Diffusivity, mm2/s | 0.11 to 0.15 | |
| 0.12 |
| Thermal Shock Resistance, points | 11 to 15 | |
| 13 |