| PEEK | |
|---|---|
| Density | 1300 kg/m3 |
| Young's modulus(E) | 3700 MPa |
| Tensile strength(σt) | 90 MPa |
| Elongation @ break | 50% |
| notch test | 55 kJ/m2 |
| Glass temperature | 143°C |
| melting point | 334°C |
| Vicat B<sup class="plainlinks nourlexpansion citation" id="ref_<1>">[1] | - |
| heat transfer coefficient (λ) | 0.25 W/m.K |
| linear expansion coefficient (α) | 1.7 10-5 /K |
| Specific heat (c) | - kJ/kg.K |
| Water absorption (ASTM) | - |
| Price | 25-50 €/kg |
| # <span class="citation wikicite" id="endnote_<vic>">^ Deformation temperature at 10kN needle load | |
| source: A.K. vam der Vegt & L.E. Govaert, Polymeren, | |
| van keten tot kunstof, ISBN 90-407-2388-5 | |
Polyetheretherketones (PEEK), also referred to as polyketones, are obtained from aromatic dihalides and bisphenolate salts by nucleophilic substitution. The bisphenolate salt is formed in situ from bisphenol and either added sodium or added alkali metal carbonate or hydroxide.
PEEK is partially crystalline, and has a glass transition temperature of 143 °C and a melting temperature of 334 °C. The material is resistant to both organic and aqueous environments, and is used in bearings, piston parts, pumps, compressor plate valves, and cable insulation applications.
PEEK is a thermoplastic with extraordinary mechanical properties. The Young's Modulus is 3.6 GPa and its tensile strength 170 MPa.
PEEK is also considered an advanced biomaterial used in medical implants.