PEEK (polyether ether ketone) is a colorless organic thermoplastic polymer. PEEK polymers are obtained by step-growth polymerization by the dialkylation of bisphenolate salts. It is generally considered to be one of the best performing thermoplastics In the world.
The processing conditions to mold PEEK can influence the crystallinity and hence the mechanical properties. It’s Youngs modulus is 3,6 GPa and its tensile strength is 90 to 100 MPa.
PEEK is a semi-crystalline thermoplastic with excellent mechanical and chemical resistance properties that are retained to high temperatures. PEEK has a glass transition temperature at around 143°C and melts around 34 3°C. PEEK brings high mechanical strength, stiffness and creep resistance over a wide temperature range. It is highly resistant to thermal degradation as well as attack by both organic and aqueous environments. It dissolves completely in concentrated sulfuric acid at room temperature.
Because of its robustness, PEEK is used to fabricate items used in demanding applications, including bearings, piston parts, pumps, HPLC columns, compressor plate valves, and cable insulation. It is one of the few plastics compatible with ultra-high vacuum applications. PEEK is considered an advanced biomaterial used in medical implants. It is extensively used in the aerospace, automotive and chemical process industries. PEEK also performs well in applications where continuous high temperatures are common.
- Very good mechanical and chemical resistance
- Excellent strength, rigidity and toughness at elevated temperatures
- Properties can be approved by adding additives (graphite, glass, carbon,…)
- Low permeability
- Low coefficient of friction
- Excellend electrical properties
- Demanding applications
- Bearings, piston parts, pumps, HPLC columns, compressor plate valves and cable insulation
- High-vacuum applications
- Used in medical implants
- Extensively used in the aerospace, automotive and chemical process industries