PP Copolymer vs. PBI
PP copolymer belongs to the thermoplastics classification, while PBI belongs to the thermoset plastics. There are 15 material properties with values for both materials. Properties with values for just one material (15, in this case) are not shown.
For each property being compared, the top bar is PP copolymer and the bottom bar is PBI.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 0.9 to 1.1 | |
| 5.9 |
| Elongation at Break, % | 12 | |
| 3.0 |
| Flexural Modulus, GPa | 1.3 | |
| 6.5 |
| Flexural Strength, MPa | 31 | |
| 220 |
| Impact Strength: Notched Izod, J/m | 110 to 350 | |
| 27 |
| Tensile Strength: Ultimate (UTS), MPa | 23 to 33 | |
| 160 |
Thermal Properties
| Heat Deflection Temperature At 1.82 MPa (264 psi), °C | 50 to 100 | |
| 430 |
| Maximum Temperature: Mechanical, °C | 80 | |
| 340 |
Electrical Properties
| Dielectric Constant (Relative Permittivity) At 1 Hz | 2.2 to 2.3 | |
| 3.4 |
| Dielectric Strength (Breakdown Potential), kV/mm | 21 to 22 | |
| 23 |
Otherwise Unclassified Properties
| Density, g/cm3 | 0.9 | |
| 1.3 |
Common Calculations
| Stiffness to Weight: Axial, points | 0.56 to 0.68 | |
| 2.5 |
| Stiffness to Weight: Bending, points | 36 to 38 | |
| 46 |
| Strength to Weight: Axial, points | 7.1 to 10 | |
| 34 |
| Strength to Weight: Bending, points | 20 to 25 | |
| 50 |