Alkali-lime-silica Glass vs. PES
Alkali-lime-silica glass and PES belong to fundamentally different material chemistries. Alkali-lime-silica glass is a ceramic material, while PES is polymeric. Therefore, their performance will be even more dissimilar than would be suggested by the difference in properties. There are 12 material properties with values for both materials. Properties with values for just one material (19, in this case) are not shown.
For each property being compared, the top bar is alkali-lime-silica glass and the bottom bar is PES.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 78 | |
| 2.6 |
| Flexural Strength, MPa | 34 to 170 | |
| 130 |
Thermal Properties
| Glass Transition Temperature, °C | 530 | |
| 220 |
| Thermal Expansion, µm/m-K | 9.0 | |
| 53 |
Electrical Properties
| Dielectric Constant (Relative Permittivity) At 1 Hz | 7.1 to 7.5 | |
| 3.5 |
| Dielectric Strength (Breakdown Potential), kV/mm | 28 | |
| 16 |
| Electrical Dissipation At 1 Hz | 0.022 to 0.052 | |
| 0.0010 |
| Electrical Dissipation At 1 MHz | 0.0088 to 0.053 | |
| 0.0035 |
| Electrical Resistivity Order of Magnitude, 10x Ω-m | 10 | |
| 15 |
Otherwise Unclassified Properties
| Density, g/cm3 | 2.7 | |
| 1.4 |
Common Calculations
| Stiffness to Weight: Axial, points | 16 | |
| 1.1 |
| Stiffness to Weight: Bending, points | 53 | |
| 33 |