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PHB vs. PET

Both PHB and PET 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 PHB and the bottom bar is PET.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 1.3
3.5 to 11
Elongation at Break, % 7.5
2.5 to 70
Tensile Strength: Ultimate (UTS), MPa 30
60 to 140

Thermal Properties

Maximum Temperature: Mechanical, °C 120
80
Melting Onset (Solidus), °C 180
260

Electrical Properties

Dielectric Constant (Relative Permittivity) At 1 Hz 3.0
3.7

Otherwise Unclassified Properties

Density, g/cm3 1.3
1.4 to 1.6

Common Calculations

Stiffness to Weight: Axial, points 0.58
1.2 to 4.4
Stiffness to Weight: Bending, points 29
32 to 54
Strength to Weight: Axial, points 6.7
12 to 27
Strength to Weight: Bending, points 17
25 to 41