PS vs. PES
Both PS and PES are thermoplastics. There are 23 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.
For each property being compared, the top bar is PS and the bottom bar is PES.
Metric UnitsUS Customary Units
Mechanical Properties
Elastic (Young's, Tensile) Modulus, GPa | 1.9 to 2.9 | |
2.6 |
Elongation at Break, % | 1.8 to 40 | |
65 |
Flexural Strength, MPa | 62 to 80 | |
130 |
Impact Strength: Notched Izod, J/m | 19 to 45 | |
91 |
Tensile Strength: Ultimate (UTS), MPa | 32 to 44 | |
87 |
Thermal Properties
Glass Transition Temperature, °C | 100 | |
220 |
Maximum Temperature: Autoignition, °C | 360 to 420 | |
500 |
Maximum Temperature: Decomposition, °C | 320 to 330 | |
540 |
Maximum Temperature: Mechanical, °C | 70 | |
200 |
Specific Heat Capacity, J/kg-K | 1250 to 1400 | |
1100 |
Thermal Conductivity, W/m-K | 0.14 to 0.22 | |
0.18 |
Thermal Expansion, µm/m-K | 80 to 98 | |
53 |
Electrical Properties
Dielectric Strength (Breakdown Potential), kV/mm | 18 to 20 | |
16 |
Electrical Resistivity Order of Magnitude, 10x Ω-m | 14 to 15 | |
15 |
Otherwise Unclassified Properties
Density, g/cm3 | 1.0 | |
1.4 |
Limiting Oxygen Index (LOI), % | 18 | |
36 |
Water Absorption After 24 Hours, % | 0.040 to 0.080 | |
0.34 |
Common Calculations
Stiffness to Weight: Axial, points | 1.0 to 1.5 | |
1.1 |
Stiffness to Weight: Bending, points | 40 to 45 | |
33 |
Strength to Weight: Axial, points | 8.5 to 12 | |
18 |
Strength to Weight: Bending, points | 22 to 26 | |
32 |
Thermal Diffusivity, mm2/s | 0.11 to 0.15 | |
0.12 |
Thermal Shock Resistance, points | 11 to 15 | |
45 |