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Polyetherimide (PEI; branded as Ultem) is an amorphous, amber-to-transparent thermoplastic with characteristics similar to the related plastic PEEK. When comparing PEI to PEEK, the former is cheaper but has lower impact strength and a tighter temperature range.
Properties, Structure & Production
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pei properties peek strength temperature ultem lower impact amorphous range chemical material density mw-parser-output 27 25 glass transition thermoplastic adhesive
| Subject | Predicate | Object | Confidence | Src |
|---|---|---|---|---|
| Polyetherimide | Density .mw-parser-output .nobold{font-weight:normal}(ρ) | 1.27 g/cc | 1.00 | infobox |
| Polyetherimide | Elongation (ε) at break | 60-80% | 1.00 | infobox |
| Polyetherimide | Glass transition temperature (Tg) | 215 C | 1.00 | infobox |
| Polyetherimide | Heat deflection temperature at 0.46 MPa / 66 psi | 210 C | 1.00 | infobox |
| Polyetherimide | Izod impact strength | 25-60 J/m | 1.00 | infobox |
| Polyetherimide | Lower working temperature | 365 C | 1.00 | infobox |
| Polyetherimide | Tensile strength (σt) | 115 MPa | 1.00 | infobox |
| Polyetherimide | Upper working temperature | 375 C | 1.00 | infobox |
| Polyetherimide | Vicat softening point | 220 C | 1.00 | infobox |
| Polyetherimide | Water absorption—over 24 hours | 0.25% | 1.00 | infobox |
| Polyetherimide | related to Properties | The | 0.60 | section |
| Polyetherimide | related to Properties | PEI | 0.60 | section |
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