29658-26-2

Basic information

• Product Name: PEEK
• Synonyms: 4,4’-Difluorobenzophenone,hydroquinonepolymer;Methanone,bis(4-fluorophenyl)-,polymerwith1,4-benzenediol;POLY ETHER ETHER KETONE;PEEK;polyetheretherkrtone;Polyetheretherketone(peek);Poly(oxy-1,4-phenyleneoxy-1,4-phenylenecarbonyl-1,4-phenylene) average Mw ~20,800, average Mn ~10,300
• CAS NO: 29658-26-2
• Molecular Formula: [OC6H4OC6H4COC6H4]n
• Molecular Weight: 328.31
• Mol File: 29658-26-2.mol
• Article Data: 0

Chemical Properties

• Melting Point: 322°C
• Appearance: /
• Density: 1.3 g/mL at 25 °C(lit.)
• Solubility: all common solvents: insoluble
• CAS DataBase Reference: PEEK(CAS DataBase Reference)
• NIST Chemistry Reference: PEEK(29658-26-2)
• EPA Substance Registry System: PEEK(29658-26-2)

Safety Data

• WGK Germany: 3
• Hazardous Substances Data: 29658-26-2(Hazardous Substances Data)

Usage

Description

PEEK, or Poly(oxy-1,4-phenyleneoxy-1,4-phenylenecarbonyl-1,4-phenylene), is a semi-crystalline polymer known for its exceptional thermo-mechanical properties and high chemical resistance, making it a popular choice for engineering plastics.

Uses

Used in Membrane Fabrication:
PEEK is used as a material for sulfonated PEEK (with a degree of sulfonation of 50-70) in the formation of antifouling-based nanofiltration membranes and proton exchange membranes for fuel cell applications.
Used in Industrial Applications:
PEEK is used as a material for injection-molded, compression-molded, or extruded stock shapes in various industries. It is particularly useful in the manufacturing of pump components, where it can be injection-molded as long as tight tolerances are not required. In cases where strict tolerances are needed, such as for bushings and wear rings, parts are machined from molded tube stock. PEEK is also used as a replacement for bronze and steel wear rings with carbon-filled or carbon-reinforced PEEK components, which can increase pump efficiency by achieving tighter clearances and reducing vibrations caused by fluid flow.
Used in High-Performance Wiring:
PEEK is used as a coating material for high-performance wiring in the aeronautics and nuclear fields due to its excellent heat resistance and electrical insulation characteristics.
Used in Advanced Structural Composites:
PEEK is used in the preparation of glass-fiber and carbon-fiber composites for advanced structural applications, taking advantage of its outstanding heat resistance and rigidity.

Preparation

Polyaryletherketones may be prepared by methods which are analogous to those used for polysulphones, namely polyetherification and polyacylation. Polyetherification occurs when fluorinated aromatic ketones react with phenates, as illustrated by the following reactions: