Soda-lime Glass vs. PPE
Soda-lime glass and PPE belong to fundamentally different material chemistries. Soda-lime glass is a ceramic material, while PPE is polymeric. Therefore, their performance will be even more dissimilar than would be suggested by the difference in properties. There are 15 material properties with values for both materials. Properties with values for just one material (14, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.
For each property being compared, the top bar is soda-lime glass and the bottom bar is PPE.
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 70 to 71 | |
| 2.3 |
| Tensile Strength: Ultimate (UTS), MPa | 41 to 180 | |
| 55 |
Thermal Properties
| Maximum Temperature: Mechanical, °C | 300 | |
| 90 |
| Specific Heat Capacity, J/kg-K | 720 to 800 | |
| 1200 |
| Thermal Conductivity, W/m-K | 1.0 to 1.1 | |
| 0.22 |
| Thermal Expansion, µm/m-K | 8.8 to 9.0 | |
| 90 |
Electrical Properties
| Dielectric Constant (Relative Permittivity) At 1 MHz | 7.3 to 7.4 | |
| 2.7 |
| Dielectric Strength (Breakdown Potential), kV/mm | 13 | |
| 19 |
Otherwise Unclassified Properties
| Density, g/cm3 | 2.4 | |
| 1.1 |
Common Calculations
| Stiffness to Weight: Axial, points | 16 | |
| 1.2 |
| Stiffness to Weight: Bending, points | 56 | |
| 42 |
| Strength to Weight: Axial, points | 4.6 to 20 | |
| 14 |
| Strength to Weight: Bending, points | 11 to 28 | |
| 30 |
| Thermal Diffusivity, mm2/s | 0.51 to 0.6 | |
| 0.17 |
| Thermal Shock Resistance, points | 4.7 to 20 | |
| 19 |