Polyetheretherketones

Various amounts of filler contents are available typically, 33% glass fiber is used. Tg of 143°C and melting temperature of 342°C, with a continuous use temperature of 260°C, are observed without thermal degradation [11], This material dissolves in concentrated sulfuric acid and is not chemically attacked by water or pressurized steam. Most importantly, it can be injection molded and is capable of holding 

PEEK oxy-1,4, phenylene-oxy-1,4 phenylene-carbonyl-1,4 phenylene FIGURE 6.5 PEEK production. 

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For fluorine-free products, the labiUty of fluorine in fluoronitrobenzenes and other activated molecules permits it to serve as a handle in hair-dye manufacturing operations, high performance polymers such as polyetheretherketone (PEEK), production of dmgs such as diuretics, and fiber-reactive dyes. Labile fluorine has also been used in analytical appHcations and biological diagnostic reagents. 

Another commercial appHcation of nucleophilic reactions of nitro-free duoroaromatics is the manufacture of polyetheretherketone (PEEK) high performance polymers from 4,4 -diduoroben2ophenone [345-92-6], and hydroquinone [121-31-9] (131) (see PoLYETHERS, AROMATIC). 

Acrylic ESTER POLYMERS Acrylonitrile POLYMERS Cellulose esters). Engineering plastics (qv) such as acetal resins (qv), polyamides (qv), polycarbonate (qv), polyesters (qv), and poly(phenylene sulfide), and advanced materials such as Hquid crystal polymers, polysulfone, and polyetheretherketone are used in high performance appHcations they are processed at higher temperatures than their commodity counterparts (see Polymers containing sulfur). 

Fig. 1. Engineering resins cost vs annual volume (11) (HDT, °C) A, polyetheretherketone (288) B, polyamideimide (>270) C, polyarylether sulfone (170- >200) D, polyimide (190) E, amorphous nylons (124) F, poly(phenylene sulfide) (>260) G, polyarylates (170) H, crystalline nylons (90—220) I, polycarbonate (130) J, midrange poly(phenylene oxide) alloy (107—150) K, polyphthalate esters (180—260) and L, acetal resins (110—140).

Polyetheretherketone Resin (PEEK). The resia was commercialized as Victrex PEEK by Imperial Chemical Industries, Ltd. (ICl) ia the late 1970s and by Amoco Chemicals Corp. ia the middle 1980s under the trade name Kadel. It is produced by both companies ia the United States. Kadel is beheved made by the displacement reaction of 4,4 -difluorodiphenyl ketone by the potassium salt of hydroquinone ... 

Other SSIMS studies of polymer surfaces have included perfluorinated polyether [3.21], low-density polyethylene [3.22], poly(ethylene terephthalate) [3.23], and the oxidation of polyetheretherketone [3.24]. 

APC-2 = a polyetheretherketone, thermoplastic polymer matrix from ICl Fiberite,... 

High-temperature TPs are available to compete with TSs, metals, ceramics, and other nonplastic materials. The heat-resistant TPs include polyetheretherketone (PEEK) and polyethersulfone (PES), polyamideimide, liquid crystal polymer (LCP) and others. 

Polyetheretherketone PEEK is a high-temperature, crystalline engineering TP used for high performance applications such as wire and cable for aerospace applications, military hardware, oil wells and nuclear plants. It holds up well under continuous 450°F (323° C) temperatures with up to 600°F (316° C) limited use. Fire resistance rating is UL 94 V-0 it resists abrasion and long-term mechanical loads. 

Report 16 Polyetheretherketone, D.J. Kemmish, ICI, Wilton. Report 17 Extrusion, G.M. Gale, Rapra Technology Ltd. 

In the last decade, some systems, such as the Dionex DX-500, have been manufactured with a flow path using corrosion-resistant materials such as polyetheretherketone (PEEK , ICI Americas Wilmington, DE), rather than the traditional stainless steel. Since stainless steel is prone to corrosion by salts, particularly halides, the introduction of titanium, ceramic, and PEEK was welcomed by those performing chromatography in aqueous systems, particularly in biological applications. PEEK , however, is not useful in applications requiring pressures greater than about 4000 psi. 

Polyetheretherketone, PEEK High temperature polymers CH063O0.16 0.029 1.60 0.001 0.008 17.0... 

Polyetheretherketone (PEEK) fibers electrical properties of, 23 718 properties of, 20 199t sulfonation of, 23 717 PEEK-based composites, 26 764 Peel-apart color films, 19 286 Peel-apart film(s), 19 274, 281, 282, 299, 314... 

Polyether-foZoc/ -polyesther, 7 646 Polyether diols, 14 271 20 76 25 476 Polyetheretherketone (PEEK) fibers,... 

The head is made of polypropylene and polyetheretherketone-based materials and is designed to run at an operating pressure of maximal 10 bar. All feed and eluent solutions are pumped directly into the column through tubes, to minimize dead zones and prevent fouling. 

PTA dissolved in a solution containing polyetheretherketone sulfonic acid (SPEEK.) in EtOH/DMF, cast as a solid membrane, and treated with CS2CO3 and H2SO4 as above. 

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