Polyether ketones

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Polyether ketones ( PEK for short ) are polymers with an alternating molecular backbone containing ketone (R – CO – R) and ether functionalities (R – O – R). The most common are polyaryletherketones (PAEK) in which there is an aryl group linked in the (1,4) position between the functional groups . The very rigid backbone gives the materials very high glass transition and melting temperatures compared to other plastics .

Manufacturing

Polyether ketones can be obtained by polycondensation of 4,4'-difluorobenzophenone and the potassium or sodium salt of hydroquinone :

Synthesis of PEEK.svg

Representative

The most widely used of these high-temperature-resistant materials is polyetheretherketone (PEEK).

Further representatives of the polyether ketones are:

  • PEKK = poly (ether ketone ketone)
  • PEEEK = poly (etheretheretherketone)
  • PEEKK = poly (ether ether ketone ketone)
  • PEKEKK = poly (ether ketone-ether ketone ketone)

literature

  • Sylvie Béland: High Performance Thermoplastic Resins and Their Composites , William Andrew, 1990, ISBN 9780815512783 , pp. 33-36 ( limited preview in Google book search).