PET vs. PP Homopolymer
Both PET and PP homopolymer are thermoplastics. There are 11 material properties with values for both materials. Properties with values for just one material (13, in this case) are not shown.
For each property being compared, the top bar is PET and the bottom bar is PP homopolymer.
Metric UnitsUS Customary Units
Mechanical Properties
| Elongation at Break, % | 2.5 to 70 | |
| 3.0 to 80 |
| Flexural Modulus, GPa | 8.3 to 14 | |
| 1.5 to 7.0 |
| Impact Strength: Notched Izod, J/m | 43 to 85 | |
| 42 to 95 |
| Tensile Strength: Ultimate (UTS), MPa | 60 to 140 | |
| 36 to 93 |
Thermal Properties
| Glass Transition Temperature, °C | 70 | |
| 170 |
| Maximum Temperature: Mechanical, °C | 80 | |
| 120 |
| Specific Heat Capacity, J/kg-K | 1000 to 1150 | |
| 1230 to 1900 |
Otherwise Unclassified Properties
| Density, g/cm3 | 1.4 to 1.6 | |
| 0.91 to 1.2 |
| Water Absorption At Saturation, % | 0.24 to 0.5 | |
| 0.010 to 0.090 |
Common Calculations
| Strength to Weight: Axial, points | 12 to 27 | |
| 11 to 21 |
| Strength to Weight: Bending, points | 25 to 41 | |
| 27 to 37 |