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PBI vs. UP

Both PBI and UP are thermoset plastics. There are 16 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 PBI and the bottom bar is UP.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 5.9
17
Elongation at Break, % 3.0
1.0
Tensile Strength: Ultimate (UTS), MPa 160
30

Thermal Properties

Glass Transition Temperature, °C 410
60
Specific Heat Capacity, J/kg-K 930
1200
Thermal Conductivity, W/m-K 0.41
0.7
Thermal Expansion, µm/m-K 23
3.0

Electrical Properties

Dielectric Constant (Relative Permittivity) At 1 Hz 3.4
6.0

Otherwise Unclassified Properties

Density, g/cm3 1.3
2.0
Limiting Oxygen Index (LOI), % 58
20

Common Calculations

Stiffness to Weight: Axial, points 2.5
4.7
Stiffness to Weight: Bending, points 46
43
Strength to Weight: Axial, points 34
4.2
Strength to Weight: Bending, points 50
11
Thermal Diffusivity, mm2/s 0.34
0.29
Thermal Shock Resistance, points 84
42