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Thermoplastic PolyEtherEtherKetone Peek Review

PolyEtherEtherKetone or PEEK is high temperature thermoplastic that is very resistant to chemical and fatigue environments and has very good thermal stability. PEEK, is an excellent material for a large array of thermal plastic applications where combustion, thermal, and chemical performance is critical. Peek exhibits a high ability ability to retain flexural and tensile properties at very high temperatures 250"C (482"F) or more within steam, or high water pressure environments.Peek is inert to all common organic and inorganic liquids and como mn solvents. Peek can be manufactured as a composite or with fiberglass or carbon fiber reinforcements to enhance mechanical and thermal properties of the material. Peek is an excellent dielectric with low loss throughout high temperature and frequencies ranges. Additionally, good radiation resistance with the ability to absorb more than 1000 M rads of infrared radiation without a significant reduction in mechanical characteristics and PEEK has exceptional resistance to high exposure of gamma radiation. Other characteristics are:

  • Outstanding wear and abrasion resistance.
  • Low coefficient of friction
  • High limiting PV properties.
  • Low smoke and toxic gas emissions.(Out gassing or emitting of smoke and gas during combustion are among the lowest of any thermoplastic material.)
  • Similar chemical and water resistance as PPS (PolyPhenylene Sulfide), however has greater high temperature resistance
PEEK has poor resistance to certain acids in concentrated form, such as; nitric, hydrobromic, hydrofluoric, sulfuric,oleum, hydrochloric, and other mineral acids PEEK does have good chemical resistance to phosphoric acid and organic acids (acetic, citric, oxalic, tartaric etc.), however resistance halogens depends on the PEEK composition and other environmental impacts.Applications:
  • Automotive
  • Marine
  • Oil and petroleum environments
  • Electronics
  • Medical
  • Aerospace
  • General industrial
Materials specifications common PEEK materials: Density 1300 kg/m3
Young's modulus (E) 3700 MPa
Tensile strength (σt) 90 MPa
Elongation @ break 50%
notch test 55 kJ/m2
Glass temperature 130-150 °C and 260-290 ºC
melting point ~350 °C
Vicat B
heat transfer coefficient (λ) 0.25 W/m.K
linear expansion coefficient (α) 1.7 10-5 /K
Specific heat (c) - kJ/kg.K
Water absorption (ASTM) - NA

PEEK materials
PEEK Chemical Composition

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