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PS vs. PPE

Both PS and PPE are thermoplastics. There are 21 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 PS and the bottom bar is PPE.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 1.9 to 2.9
2.3
Elongation at Break, % 1.8 to 40
30
Flexural Strength, MPa 62 to 80
75
Tensile Strength: Ultimate (UTS), MPa 32 to 44
55

Thermal Properties

Glass Transition Temperature, °C 100
85
Maximum Temperature: Autoignition, °C 360 to 420
430
Maximum Temperature: Mechanical, °C 70
90
Specific Heat Capacity, J/kg-K 1250 to 1400
1200
Thermal Conductivity, W/m-K 0.14 to 0.22
0.22
Thermal Expansion, µm/m-K 80 to 98
90
Vicat Softening Temperature, °C 100 to 110
140

Electrical Properties

Dielectric Strength (Breakdown Potential), kV/mm 18 to 20
19
Electrical Resistivity Order of Magnitude, 10x Ω-m 14 to 15
13

Otherwise Unclassified Properties

Density, g/cm3 1.0
1.1
Water Absorption After 24 Hours, % 0.040 to 0.080
0.23

Common Calculations

Stiffness to Weight: Axial, points 1.0 to 1.5
1.2
Stiffness to Weight: Bending, points 40 to 45
42
Strength to Weight: Axial, points 8.5 to 12
14
Strength to Weight: Bending, points 22 to 26
30
Thermal Diffusivity, mm2/s 0.11 to 0.15
0.17
Thermal Shock Resistance, points 11 to 15
19