Borosilicate Glass vs. PBT
Borosilicate glass and PBT belong to fundamentally different material chemistries. Borosilicate glass is a ceramic material, while PBT is polymeric. Therefore, their performance will be even more dissimilar than would be suggested by the difference in properties. There are 10 material properties with values for both materials. Properties with values for just one material (26, in this case) are not shown.
For each property being compared, the top bar is borosilicate glass and the bottom bar is PBT.
Metric UnitsUS Customary Units
Material Properties
| Density, g/cm3 | 2.2 to 2.6 | |
| 1.3 to 1.5 |
| Elastic (Young's, Tensile) Modulus, GPa | 67 to 80 | |
| 2.7 to 8.7 |
| Flexural Strength, MPa | 34 to 69 | |
| 79 to 210 |
| Melting Onset (Solidus), °C | 560 | |
| 230 |
| Specific Heat Capacity, J/kg-K | 830 | |
| 1040 to 1200 |
| Stiffness to Weight: Axial, points | 15 to 17 | |
| 1.1 to 3.2 |
| Stiffness to Weight: Bending, points | 55 to 61 | |
| 35 to 45 |
| Strength to Weight: Axial, points | 30 to 35 | |
| 12 to 25 |
| Strength to Weight: Bending, points | 36 to 43 | |
| 25 to 38 |
| Tensile Strength: Ultimate (UTS), MPa | 280 | |
| 58 to 140 |