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PHB vs. FEP

Both PHB and FEP are thermoplastics. There are 15 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 PHB and the bottom bar is FEP.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 1.3
0.43
Elongation at Break, % 7.5
300
Flexural Strength, MPa 20
24
Tensile Strength: Ultimate (UTS), MPa 30
20

Thermal Properties

Heat Deflection Temperature At 1.82 MPa (264 psi), °C 60
50
Maximum Temperature: Mechanical, °C 120
200
Melting Onset (Solidus), °C 180
260

Electrical Properties

Dielectric Constant (Relative Permittivity) At 1 Hz 3.0
1.9
Electrical Resistivity Order of Magnitude, 10x Ω-m 14
16

Otherwise Unclassified Properties

Density, g/cm3 1.3
2.1
Water Absorption After 24 Hours, % 0.75
0.010

Common Calculations

Stiffness to Weight: Axial, points 0.58
0.11
Stiffness to Weight: Bending, points 29
12
Strength to Weight: Axial, points 6.7
2.6
Strength to Weight: Bending, points 17
7.6