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PPE vs. PES

Both PPE and PES are thermoplastics. There are 22 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 PPE and the bottom bar is PES.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 2.3
2.6
Elongation at Break, % 30
65
Flexural Strength, MPa 75
130
Tensile Strength: Ultimate (UTS), MPa 55
87

Thermal Properties

Glass Transition Temperature, °C 85
220
Heat Deflection Temperature At 1.82 MPa (264 psi), °C 120
200
Maximum Temperature: Autoignition, °C 430
500
Maximum Temperature: Mechanical, °C 90
200
Specific Heat Capacity, J/kg-K 1200
1100
Thermal Conductivity, W/m-K 0.22
0.18
Thermal Expansion, µm/m-K 90
53

Electrical Properties

Dielectric Constant (Relative Permittivity) At 1 MHz 2.7
3.5
Dielectric Strength (Breakdown Potential), kV/mm 19
16
Electrical Resistivity Order of Magnitude, 10x Ω-m 13
15

Otherwise Unclassified Properties

Density, g/cm3 1.1
1.4
Water Absorption After 24 Hours, % 0.23
0.34

Common Calculations

Stiffness to Weight: Axial, points 1.2
1.1
Stiffness to Weight: Bending, points 42
33
Strength to Weight: Axial, points 14
18
Strength to Weight: Bending, points 30
32
Thermal Diffusivity, mm2/s 0.17
0.12
Thermal Shock Resistance, points 19
45