Polyetherketoneketone (PEKK) is a semi-crystalline thermoplastic in the polyaryletherketone (PAEK) family of polymers. It possesses high heat, chemical, and mechanical load resistance.[1] PEKK has a glass transition temperature (Tg) of 162 °C.[2]

  • 29658-26-2
Abbreviations PEKK
  • none
ECHA InfoCard 100.133.809 Edit this at Wikidata
  • DTXSID4094534 Edit this at Wikidata
Density 1.278 g/cm3
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references
HDD part made from Polyetherketoneketone


Hexcel Corporation (Formerly Oxford Performance Materials) manufactures PEKK-based parts for Boeing for use in its Starliner space taxis, using 3D printing-based additive manufacturing. It has wide dental and medical applications.[3] The parts are claimed to be as strong as aluminum while being 40 percent of the weight. In addition, PEKK manufactured components have shown fire and radiation resistant properties.[4]


  1. ^ "ASTM F2820 - 12 Standard Specification for Polyetherketoneketone (PEKK) Polymers for Surgical Implant Applications".
  2. ^ "PEKK for High Temperature Applications". 2 July 2009.
  3. ^ Alqurashi, H.; Khurshid, Z.; Syed AUY; Rashid Habib, S.; Rokaya, D.; Zafar, M. S. (2021). "Polyetherketoneketone (PEKK): An emerging biomaterial for oral implants and dental prostheses". Journal of Advanced Research. Vol. 28. pp. 87–95. doi:10.1016/j.jare.2020.09.004. PMC 7770505. PMID 33384878.
  4. ^ "Exclusive: Boeing's space taxis to use more than 600 3D-printed parts". Reuters. 2017-02-03. Retrieved 2017-02-09.