Polyetherketoneketone
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| Abbreviations = PEKK
| CASNo = 29658-26-2
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|Section2={{Chembox Properties
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| Density = 1.278 g/cm3
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Polyetherketoneketone (PEKK) is a semi-crystalline thermoplastic in the polyaryletherketone (PAEK) family of polymers. It possesses high heat, chemical, and mechanical load resistance.{{cite web|url=http://www.astm.org/Standards/F2820.htm|title=ASTM F2820 - 12 Standard Specification for Polyetherketoneketone (PEKK) Polymers for Surgical Implant Applications|publisher=}} PEKK has a glass transition temperature (Tg) of 162 °C.{{cite web|url=http://www.azom.com/news.aspx?newsID=17908|title=PEKK for High Temperature Applications|date=2 July 2009|publisher=}}
Applications
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. 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.{{Cite news|url=https://www.reuters.com/article/us-boeing-space-exclusive-idUSKBN15I1HW|title=Exclusive: Boeing's space taxis to use more than 600 3D-printed parts|date=2017-02-03|newspaper=Reuters|access-date=2017-02-09}}
Oxford Performance Materials manufactures Biomedical 3D printing of PEKK parts.{{Cite web |title=Biomedical 3D Printing |url=https://www.oxfordpm.com/biomedical-3dp |access-date=2024-01-28 |website=Oxford Performance Materials, Inc. |language=en-US}} In addition, the company has a solution casting technology to apply a nanoscale coating of PEKK to various mediums.{{Cite web |title=OXPEKK Products |url=https://www.oxfordpm.com/oxpekk-products |access-date=2024-01-28 |website=Oxford Performance Materials, Inc. |language=en-US}}