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PPA vs. PET

Both PPA and PET are thermoplastics. There are 13 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 PPA and the bottom bar is PET.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 2.1 to 2.2
3.5 to 11
Elongation at Break, % 30
2.5 to 70
Flexural Modulus, GPa 2.3 to 2.4
8.3 to 14
Tensile Strength: Ultimate (UTS), MPa 57 to 69
60 to 140

Thermal Properties

Glass Transition Temperature, °C 92 to 130
70
Maximum Temperature: Decomposition, °C 450
390
Melting Onset (Solidus), °C 310
260
Specific Heat Capacity, J/kg-K 1400
1000 to 1150

Otherwise Unclassified Properties

Density, g/cm3 1.1
1.4 to 1.6

Common Calculations

Stiffness to Weight: Axial, points 1.0 to 1.1
1.2 to 4.4
Stiffness to Weight: Bending, points 38
32 to 54
Strength to Weight: Axial, points 14 to 17
12 to 27
Strength to Weight: Bending, points 29 to 33
25 to 41