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Polyether ether ketone (PEEK) is a colourless organic thermoplastic polymer in the polyaryletherketone (PAEK) family, used in engineering applications. It was invented in November 1978 [2] and brought to market in the early 1980s by part of Imperial Chemical Industries (ICI), the PEEK division was acquired through a management buyout, giving rise to Victrex PLC.
Polyetherketones (PEK for short) are polymers whose molecular backbone contain alternating ketone (R-CO-R) and Ether (R-O-R) functionalities. The most common are Polyaryletherketones (PAEK), in which there is an aryl group linked in the (1–4)-position between each of the functional groups.
This colorless solid is commonly used as a precursor to PEEK, or polyetherether ketone, a so-called high performance polymer. Because PEEK is resistant to attack, it is commonly used in carbon fiber coatings and cable insulation.
It is also used in the chemical pump industry because it can withstand the temperature, stress, and has the corrosion resistance. In the automotive industry it is used to make gears and thrust bearings in transmissions. [4] Due to its excellent resistance to hydrolysis it is used in medical devices because it does not break down when sterilized.
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 ...
Other materials used for diaphragms include polypropylene (PP), polyetheretherketone (PEEK) polycarbonate (PC), Mylar (PET), silk, glassfibre, carbon fibre, titanium, aluminium, aluminium-magnesium alloy, nickel, and beryllium. A 12-inch-diameter (300 mm) paper woofer with a peak-to-peak excursion of 0.5 inches at 60 Hz undergoes a maximum ...
When comparing PEI to PEEK, the former is cheaper but has lower impact strength and a tighter temperature range. [2] PEI plastics were first introduced into the market by General Electric (GE) in 1982 under the trade name Ultem. [3] Due to its adhesive properties and chemical stability it became a popular bed material for FFF 3D printers.
Olimunllum is a thermoplastic composite material containing a quasi-isotropic endless carbon fiber reinforcement and a semi-crystalline thermoplastic polymer matrix from the Polyaryletherketone family.