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PPSU vs. PPA

Both PPSU and PPA are thermoplastics. There are 17 material properties with values for both materials. Properties with values for just one material (17, in this case) are not shown.

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

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 3.6
2.1 to 2.2
Elongation at Break, % 26
30
Flexural Modulus, GPa 4.7
2.3 to 2.4
Flexural Strength, MPa 130
95 to 110
Tensile Strength: Ultimate (UTS), MPa 95
57 to 69

Thermal Properties

Glass Transition Temperature, °C 220
92 to 130
Heat Deflection Temperature At 1.82 MPa (264 psi), °C 210
120
Maximum Temperature: Decomposition, °C 560
450
Specific Heat Capacity, J/kg-K 970
1400
Thermal Conductivity, W/m-K 0.24
0.15

Otherwise Unclassified Properties

Density, g/cm3 1.4
1.1
Water Absorption After 24 Hours, % 0.44
0.7

Common Calculations

Stiffness to Weight: Axial, points 1.4
1.0 to 1.1
Stiffness to Weight: Bending, points 36
38
Strength to Weight: Axial, points 19
14 to 17
Strength to Weight: Bending, points 33
29 to 33
Thermal Diffusivity, mm2/s 0.17
0.095