PBT vs. CR Rubber
PBT belongs to the thermoplastics classification, while CR rubber belongs to the thermoset elastomers (rubber). There are 10 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.
For each property being compared, the top bar is PBT and the bottom bar is CR rubber.
Metric UnitsUS Customary Units
Material Properties
| Density, g/cm3 | 1.3 to 1.5 | |
| 1.5 |
| Elongation at Break, % | 2.5 to 43 | |
| 380 |
| Glass Transition Temperature, °C | 40 | |
| -45 |
| Limiting Oxygen Index (LOI), % | 20 | |
| 26 |
| Maximum Temperature: Autoignition, °C | 380 | |
| 410 |
| Maximum Temperature: Decomposition, °C | 380 | |
| 350 |
| Specific Heat Capacity, J/kg-K | 1040 to 1200 | |
| 1120 |
| Strength to Weight: Axial, points | 12 to 25 | |
| 1.9 |
| Strength to Weight: Bending, points | 25 to 38 | |
| 7.1 |
| Tensile Strength: Ultimate (UTS), MPa | 58 to 140 | |
| 11 |