Polystyrene (PS)
Properties
Common uses
Polystyrene
Material Specifications
ASTM or UL test | Property | GPPS |
Physical |
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D792 | Density (lb/in3)/(g/cm3) | 0.043 (1.05) |
D570 | Water absorption, 24 hrs (%) | 0.06 |
Mechanical |
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D638 | Tensile strength (psi) | 7,500 |
D638 | Tensile modulus (psi) | - |
D638 | Tensile elongation at break (%) | 47 |
D790 | Flexural strength (psi) | 6,100 |
D790 | Flexural modulus (psi) | 475,000 |
D785 | Hardness, Rockwell | 75 |
D256 | Izod notched impact (ft-lb/in) | 0.8 |
Thermal |
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D696 | Coefficient of linear thermal expansion (x 10–5 in./in./°F) |
0.0–87.8 |
D648 | Heat deflection temp (F°) at 264 psi | 144.60 |
D3418 | Melting temp (F°/C°) | - |
D3418 | Vicat softening temp (F°/C°) | 224/107 |
- | Max operating temp (F°/C°) | 150/65 |
C177 | Thermal conductivity (BTU-in/ft²-hr-°F) |
0.187–34.8 |
UL94 | Flammability rating | H-B |
Electrical |
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D150 | Dielectric constant at 1 MHz | 2.5 |
D150 | Dissipation factor at 1 KHz | 0.0005–0.00690 |
D150 | Dielectric strength at 1KHz | 305–14,000 |
D495 | Arc resistance (sec) | 70 |
D257 | Volume resistivity (ohm/cm) at 50% RH | >1016 |
These are typical values for reference and comparison only. They should not be used as a basis for design specifications or quality control. Contact us for the manufacturers’ complete material property datasheets. All values were taken at 73°F (23°C) unless otherwise noted.
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