PET vs. PP Copolymer
Both PET and PP copolymer are thermoplastics. There are 13 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.
For each property being compared, the top bar is PET and the bottom bar is PP copolymer.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 3.5 to 11 | |
| 0.9 to 1.1 |
| Elongation at Break, % | 2.5 to 70 | |
| 12 |
| Flexural Modulus, GPa | 8.3 to 14 | |
| 1.3 |
| Impact Strength: Notched Izod, J/m | 43 to 85 | |
| 110 to 350 |
| Tensile Strength: Ultimate (UTS), MPa | 60 to 140 | |
| 23 to 33 |
Thermal Properties
| Maximum Temperature: Mechanical, °C | 80 | |
| 80 |
| Melting Onset (Solidus), °C | 260 | |
| 150 |
Electrical Properties
| Dielectric Constant (Relative Permittivity) At 1 Hz | 3.7 | |
| 2.2 to 2.3 |
Otherwise Unclassified Properties
| Density, g/cm3 | 1.4 to 1.6 | |
| 0.9 |
Common Calculations
| Stiffness to Weight: Axial, points | 1.2 to 4.4 | |
| 0.56 to 0.68 |
| Stiffness to Weight: Bending, points | 32 to 54 | |
| 36 to 38 |
| Strength to Weight: Axial, points | 12 to 27 | |
| 7.1 to 10 |
| Strength to Weight: Bending, points | 25 to 41 | |
| 20 to 25 |