PHB vs. CAB

Both PHB and CAB are thermoplastics. There are 10 material properties with values for both materials. Properties with values for just one material (19, in this case) are not shown.

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

Polyhydroxybutyrate (PHB)Cellulose Acetate Butyrate (CAB)

Metric UnitsUS Customary Units

Material Properties

Density, g/cm³		1.3
Density, g/cm³		1.2

Electrical Resistivity Order of Magnitude, 10^x Ω-m		14
Electrical Resistivity Order of Magnitude, 10^x Ω-m		16

Elongation at Break, %		7.5
Elongation at Break, %		50 to 55

Flexural Strength, MPa		20
Flexural Strength, MPa		21 to 57

Heat Deflection Temperature At 1.82 MPa (264 psi), °C		60
Heat Deflection Temperature At 1.82 MPa (264 psi), °C		53 to 82

Strength to Weight: Axial, points		6.7
Strength to Weight: Axial, points		4.8 to 12

Strength to Weight: Bending, points		17
Strength to Weight: Bending, points		14 to 25

Tensile Strength: Ultimate (UTS), MPa		30
Tensile Strength: Ultimate (UTS), MPa		20 to 50

Vicat Softening Temperature, °C		58
Vicat Softening Temperature, °C		90 to 120

Water Absorption After 24 Hours, %		0.75
Water Absorption After 24 Hours, %		1.2 to 1.6

PHB vs. CAB

Material Properties

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