Thermoplastic comparison
Polystyrene (GPPS) vs Polysulfone (PSU)
Every value below is a typical room-temperature figure with its source, test method and conditions — the same dataset that drives the calculators.
| Property | Polystyrene (GPPS) | Polysulfone (PSU) | Difference |
|---|---|---|---|
| Density | 1.05 g/cm³ | 1.24 g/cm³ | Polysulfone (PSU) — 18% higher |
| Young's modulus E | 3.2 GPa | 2.5 GPa | Polystyrene (GPPS) — 28% higher |
| Tensile strength | 46 MPa | 70 MPa | Polysulfone (PSU) — 52% higher |
| Glass transition Tg | 100 °C | 185 °C | Polysulfone (PSU) — 85 °C higher |
Where these numbers come from
- Callister & Rethwisch, Materials Science and Engineering, 10th ed.
- CAMPUS plastics database — typical grade datasheet values (campusplastics.com)
Typical room-temperature values for learning and preliminary design; grades vary widely and a supplier datasheet always overrides a textbook figure. Confirm against the datasheet before design work.