PHB vs. PPO

Both PHB and PPO are thermoplastics. There are 11 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.

For each property being compared, the top bar is PHB and the bottom bar is PPO.

Polyhydroxybutyrate (PHB)Polyphenylene Oxide (PPO)

Metric UnitsUS Customary Units

Mechanical Properties

Elongation at Break, %		7.5
Elongation at Break, %		3.5 to 28

Flexural Strength, MPa		20
Flexural Strength, MPa		92 to 140

Tensile Strength: Ultimate (UTS), MPa		30
Tensile Strength: Ultimate (UTS), MPa		63 to 140

Thermal Properties

Heat Deflection Temperature At 1.82 MPa (264 psi), °C		60
Heat Deflection Temperature At 1.82 MPa (264 psi), °C		120 to 140

Maximum Temperature: Mechanical, °C		120
Maximum Temperature: Mechanical, °C		100 to 110

Electrical Properties

Dielectric Constant (Relative Permittivity) At 1 Hz		3.0
Dielectric Constant (Relative Permittivity) At 1 Hz		2.7 to 3.2

Electrical Resistivity Order of Magnitude, 10^x Ω-m		14
Electrical Resistivity Order of Magnitude, 10^x Ω-m		15

Otherwise Unclassified Properties

Density, g/cm³		1.3
Density, g/cm³		1.1 to 1.4

Water Absorption After 24 Hours, %		0.75
Water Absorption After 24 Hours, %		0.060 to 0.070

Common Calculations

Strength to Weight: Axial, points		6.7
Strength to Weight: Axial, points		16 to 27

Strength to Weight: Bending, points		17
Strength to Weight: Bending, points		33 to 42