GPPS vs. PMMA
Both GPPS and PMMA are thermoplastics. There are 26 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.
For each property being compared, the top bar is GPPS and the bottom bar is PMMA.
Metric UnitsUS Customary Units
Mechanical Properties
| Compressive (Crushing) Strength, MPa | 90 | |
| 120 |
| Elastic (Young's, Tensile) Modulus, GPa | 2.9 | |
| 3.2 |
| Elongation at Break, % | 1.8 | |
| 4.0 |
| Flexural Strength, MPa | 80 | |
| 110 |
| Impact Strength: Notched Izod, J/m | 19 | |
| 74 |
| Rockwell M Hardness | 65 | |
| 93 |
| Tensile Strength: Ultimate (UTS), MPa | 44 | |
| 71 |
Thermal Properties
| Glass Transition Temperature, °C | 100 | |
| 110 |
| Heat Deflection Temperature At 1.82 MPa (264 psi), °C | 90 | |
| 96 |
| Maximum Temperature: Autoignition, °C | 360 | |
| 320 |
| Maximum Temperature: Decomposition, °C | 320 | |
| 360 |
| Specific Heat Capacity, J/kg-K | 1250 | |
| 1260 |
| Thermal Conductivity, W/m-K | 0.14 | |
| 0.19 |
| Thermal Expansion, µm/m-K | 98 | |
| 76 |
| Vicat Softening Temperature, °C | 100 | |
| 90 |
Electrical Properties
| Dielectric Constant (Relative Permittivity) At 1 Hz | 2.5 | |
| 3.6 |
| Dielectric Strength (Breakdown Potential), kV/mm | 20 | |
| 30 |
Otherwise Unclassified Properties
| Density, g/cm3 | 1.0 | |
| 1.2 |
| Limiting Oxygen Index (LOI), % | 18 | |
| 17 |
| Refractive Index | 1.6 | |
| 1.5 |
Common Calculations
| Stiffness to Weight: Axial, points | 1.5 | |
| 1.5 |
| Stiffness to Weight: Bending, points | 45 | |
| 42 |
| Strength to Weight: Axial, points | 12 | |
| 17 |
| Strength to Weight: Bending, points | 26 | |
| 32 |
| Thermal Diffusivity, mm2/s | 0.11 | |
| 0.13 |
| Thermal Shock Resistance, points | 11 | |
| 21 |