Unfilled PBT vs. PLA
Both unfilled PBT and PLA are thermoplastics. There are 17 material properties with values for both materials. Properties with values for just one material (16, in this case) are not shown.
For each property being compared, the top bar is unfilled PBT and the bottom bar is PLA.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 2.7 | |
| 3.5 |
| Elongation at Break, % | 43 | |
| 6.0 |
| Flexural Modulus, GPa | 2.6 | |
| 4.0 |
| Flexural Strength, MPa | 79 | |
| 80 |
| Tensile Strength: Ultimate (UTS), MPa | 58 | |
| 50 |
Thermal Properties
| Glass Transition Temperature, °C | 40 | |
| 60 |
| Heat Deflection Temperature At 455 kPa (66 psi), °C | 160 | |
| 65 |
| Maximum Temperature: Mechanical, °C | 110 | |
| 50 |
| Melting Onset (Solidus), °C | 230 | |
| 160 |
| Specific Heat Capacity, J/kg-K | 1200 | |
| 1800 |
| Thermal Conductivity, W/m-K | 0.21 | |
| 0.13 |
Otherwise Unclassified Properties
| Density, g/cm3 | 1.3 | |
| 1.3 |
Common Calculations
| Stiffness to Weight: Axial, points | 1.1 | |
| 1.6 |
| Stiffness to Weight: Bending, points | 35 | |
| 40 |
| Strength to Weight: Axial, points | 12 | |
| 11 |
| Strength to Weight: Bending, points | 25 | |
| 24 |
| Thermal Diffusivity, mm2/s | 0.13 | |
| 0.058 |