PTFE vs. PHB

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

Polytetrafluoroethylene (PTFE)Polyhydroxybutyrate (PHB)

Metric UnitsUS Customary Units

Mechanical Properties

Elongation at Break, %		75 to 300
Elongation at Break, %		7.5

Flexural Strength, MPa		13 to 50
Flexural Strength, MPa		20

Tensile Strength: Ultimate (UTS), MPa		13 to 25
Tensile Strength: Ultimate (UTS), MPa		30

Thermal Properties

Heat Deflection Temperature At 1.82 MPa (264 psi), °C		66 to 70
Heat Deflection Temperature At 1.82 MPa (264 psi), °C		60

Maximum Temperature: Mechanical, °C		260 to 270
Maximum Temperature: Mechanical, °C		120

Melting Onset (Solidus), °C		330 to 340
Melting Onset (Solidus), °C		180

Electrical Properties

Electrical Resistivity Order of Magnitude, 10^x Ω-m		2.0 to 18
Electrical Resistivity Order of Magnitude, 10^x Ω-m		14

Otherwise Unclassified Properties

Density, g/cm³		2.1 to 2.3
Density, g/cm³		1.3

Water Absorption After 24 Hours, %		0.0093 to 0.050
Water Absorption After 24 Hours, %		0.75

Common Calculations

Strength to Weight: Axial, points		1.7 to 3.2
Strength to Weight: Axial, points		6.7

Strength to Weight: Bending, points		5.7 to 8.7
Strength to Weight: Bending, points		17