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PPA vs. PBT

Both PPA and PBT are thermoplastics. There are 15 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is PPA and the bottom bar is PBT.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 2.1 to 2.2
2.7 to 8.7
Elongation at Break, % 30
2.5 to 43
Flexural Modulus, GPa 2.3 to 2.4
2.6 to 9.1
Flexural Strength, MPa 95 to 110
79 to 210
Tensile Strength: Ultimate (UTS), MPa 57 to 69
58 to 140

Thermal Properties

Glass Transition Temperature, °C 92 to 130
40
Heat Deflection Temperature At 1.82 MPa (264 psi), °C 120
4.0
Maximum Temperature: Decomposition, °C 450
380
Melting Onset (Solidus), °C 310
230
Specific Heat Capacity, J/kg-K 1400
1040 to 1200

Otherwise Unclassified Properties

Density, g/cm3 1.1
1.3 to 1.5

Common Calculations

Stiffness to Weight: Axial, points 1.0 to 1.1
1.1 to 3.2
Stiffness to Weight: Bending, points 38
35 to 45
Strength to Weight: Axial, points 14 to 17
12 to 25
Strength to Weight: Bending, points 29 to 33
25 to 38