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PPSU vs. PS

Both PPSU and PS are thermoplastics. There are 23 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.

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

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 3.6
1.9 to 2.9
Elongation at Break, % 26
1.8 to 40
Flexural Strength, MPa 130
62 to 80
Impact Strength: Notched Izod, J/m 80
19 to 45
Tensile Strength: Ultimate (UTS), MPa 95
32 to 44

Thermal Properties

Glass Transition Temperature, °C 220
100
Maximum Temperature: Autoignition, °C 580
360 to 420
Maximum Temperature: Decomposition, °C 560
320 to 330
Maximum Temperature: Mechanical, °C 160
70
Specific Heat Capacity, J/kg-K 970
1250 to 1400
Thermal Conductivity, W/m-K 0.24
0.14 to 0.22
Thermal Expansion, µm/m-K 45
80 to 98

Electrical Properties

Dielectric Strength (Breakdown Potential), kV/mm 16
18 to 20
Electrical Resistivity Order of Magnitude, 10x Ω-m 14
14 to 15

Otherwise Unclassified Properties

Density, g/cm3 1.4
1.0
Limiting Oxygen Index (LOI), % 38
18
Water Absorption After 24 Hours, % 0.44
0.040 to 0.080

Common Calculations

Stiffness to Weight: Axial, points 1.4
1.0 to 1.5
Stiffness to Weight: Bending, points 36
40 to 45
Strength to Weight: Axial, points 19
8.5 to 12
Strength to Weight: Bending, points 33
22 to 26
Thermal Diffusivity, mm2/s 0.17
0.11 to 0.15
Thermal Shock Resistance, points 42
11 to 15