Victrex® PEEK Poly

Poly(aryl ether ketones) belong to the class of engineering polymers. In early to mid-1970s, Raychem Corp. commercially introduced a poly-Caryl ether ketone) called Stilan . In this polymer, each ether and keto group is separated hy 1,4-phenylene units. In 1978, Imperial Chemical Industries PLC (ICI) commercialized a poly(aryl ether ketone) under the trademark Victrex PEEK. ... 

Victrex PEEK (Series) Poly(etheretherketone) Victrex PLC... 

Poly(etheretherketone), cable coating, 231, 296 Victrex PEEK (Series)... 

Poly(ether ether ketone) (ICI Victrex PEEK 450G), (the structure is shown in Figure 7.17). The PEEK samples were prepared by heating the pellets at ca 400 °C in an evacuated oven and then quenching them in liquid nitrogen ca 5 min). The samples were dried at room temperature. 

Poly(ether ether ketone) (PEEK) is an aromatic, high performance, semicrystalline polymer with extremely good thermal stability, chemical resistance, and electrical and mechanical properties. This polymer shows little solubility in organic solvents due to the crystallinity. One of the first ways to characterize PEEK was by sulfonating the polymer. By adding sulfonic acid groups to the backbone, the crystallinity decreased and solubility increased.Commercially available Victrex appears to be one of the more interesting poly(arylene ether) s used for postmodification. 

Furthermore, in 2001, Ballard entered an alliance with Victrex to produce two new membrane alternatives. One membrane is based on sulfonated poly(arylether) ketone (a variant of PEEK) supplied by Victrex, which may be better suited to PEMFC fabrication applications. In March 2002, U.S. Patent 6,359,019 was issued to Ballard Power for a graft-polymeric membrane in which one or more trifluorovinylaromatic monomers are radiation graft polymerized to a preformed polymeric base. The strucmres of BAM membranes have been studied by way of small-angle neutron scattering (SANS) [97]. The study of the ionomer peak position suggests the existence of relatively small ionic domains compared to Nalion, despite large water content. Phase separation in the polymer matrix is possibly crucial for the membrane s mechanical and transport properties. 

The development of polyaryls, in particular polyetherketones (PEEK), as a substitute of perfluorinated polymers was mainly based on cost and stability considerations [1]. Sulfonated polyetherketones has been found to be durable under fuel cell operation conditions over several thousand hours [185]. Victrex Company is the main producer of PEEK polymer and its sulfonation can be performed directly on the polymer backbone or by polymerization of sulfonated monomers [7]. Hoechst-Aventis and Eumatech commercialize sulfonated PEEK (sPEEK) and sulfonated poly(phtalazinone ether ketone) (sPPEK) membranes for fuel cell applications [3]. 

In recent years, new high-temperature-resistant engineering polymers have appeared. One of the most recently developed is poly(ether ether ketone) (PEEK), developed by ICI under the trade name Victrex . At room temperature, PEEK is insoluble in all classic organic solvents and dissolves only in some concentrated acids such as sulphuric, methane-sulphonic or hydrofluoric acids. At temperatures closer to its melting point, PEEK dissolves in rather unusual media, such as high-boiling esters, benzophenone, or diphenyl sulphone. 

Poly(ether ether ketone) (PEEK) Victrex Polyetherimide (PEI) Ultem... 

The nucleophilic substitution reaction of an activated benzenoid halide with a phenoxide anion is currently the method used worldwide for the preparation of aromatic poly(aryl ether sulfones) " and poly(aryl ether ketones). " Amoco Performance Products UDEL Polysulfone and RADEL Polyphenylsulfone are made commercially via this route. The subject substitution reactions are also used by ICI to produce their Victrex Poly(ether sulfone) (PES) and Victrex Poly(ether ether ketone) (PEEK). 

Poly(ether ether ketone) (PEEK) Victrex Victrex Manuf. Cable insulation, coatings, composites, automotive, industrial, chemical, aerospace, electrical/electronic (E/E)... 

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