Polyether poly PEEK

Polyarylether Ketones. The aromatic polyether ketones are tme thermoplastics. Although several are commercially available, two resins in particular, poly ether ether ketone [31694-16-3] (PEEK) from ICI and poly ether ketone ketone (PEKK) from Du Pont, have received most of the attention. PEEK was first synthesized in 1981 (20) and has been well studied it is the subject of numerous papers because of its potential use in high performance aircraft. Tough, semicrystalline PEEK is prepared by the condensation of bis(4-fiuorophenyl) ketone with the potassium salt of bis(4-hydroxyphenyl) ketone in a diaryl sulfone solvent, such as diphenyl sulfone. The choice of solvent is critical other solvents, such as Hquid HE, promote the reaction but lead to premature low molecular-weight crystals, which do not exhibit sufficient toughness (21). 

Membrane materials often employed are hydrophobic polysulfone or hydrophilic regenerated cellulose or cellulose acetate other materials are nylon, polytetrafluoro-ethylene (PTFE, Teflon), polyether ether ketone (PEEK) or poly(divinyl fluoride) (PDVF). 

Sulfonation is very useful chemical modification of polymer, as it induces high polarity in the polymer changing its chemical as well as physical properties. Sulfonated polymers are also important precursors for ionomer formation [75]. There are reports of sulfonation of ethylene-propylene diene terpolymer (EPDM) [76, 77], polyarylene-ether-sulfone [78], polyaromatic ether ketone [79], polyether ether ketone (PEEK) [80], styrene-ethylene-butylene-styrene block copolymer, (SEBS) [81]. Poly [bis(3-methyl phenoxy) phosphozene] [82], Sulfonated polymers show a distinct peak at 1176 cm"1 due to stretching vibration of 0=S=0 in the -S03H group. Another peak appears at 881 cm 1 due to stretching vibration of S-OH bond. However, the position of different vibrational bands due to sulfonation depends on the nature of the cations as well as types of solvents [75, 76]. 

In addition to the polymers described above, the MALDI technique has also been employed for the characterization of several synthetic polymeric materials. The literature reports the MALDI characterization of polyacrylonitrile (PAN), poly(ether sulfone) (PES), poly(dimethyl phenylene oxide) (PDMPO), and functionalized poly(p-phenylene)s. Analysis by MALDI-TOF of aromatic polyethers (such as PEEK), can be found, and several macrocyclic samples were also characterized by MALDI-TOF. ... 

Polyether ether ketone (PEEK) is a linear, aromatic, semi-crystalline thermoplastic possessing excellent thermal stability, chemical resistance and mechanical properties under engineering applications. It has the repeating unit structure, 0—Ph—O—Ph—CO Ph—, wherein "Ph" is the 1,4-phenylene unit. Its true scientific name is poly (oxy-1, 4-phenylene-oxy-l, 4-phenylenecarbonyl-l, 4-phenylene). The polymer is featured in a wide range of applications including transportation, energy, industrial, electronics, semiconductor and medical. 

Figure 432 illustrates recent results on the metastable macromolecule PEEK [polyether-ether-ketone or poly(oxy-l,4-phenyleneoxy-l,4-phenylene-... 

High-performance engineering thermoplastics have recently assumed increasing importance due to their exceptional properties at elevated temperatures. A number of such specialty polymers has been introduced into the market for high-temperature applications and examples of some of the outstanding ones are poly phenylene oxide (PPO), poly phenylene sulfide (PPS), polyether sulfone (PES), polyaryl sulfone (PAS), polyether ether ketone (PEEK), polyetherimide (PEI), and polyarylate (PAi). 

In partieular we specify on a new protocol for packing glassy polymer with intermediate eontrol of free volume distribution for four polyether-ether-ketones, an amorphous poly(oxa-p-phenylene-3,3-phthalido-/>-phenylenxoxa-p-phenyl-enexoxi-p-phenylene) (PEEK-WQ, the dimethyl PEEK-WC (DMPEEK), the tetramethyl PEEK-WC (TMPEEK) and the di-isopropyl dimethyl PEEK-WC (DIDMPEEK). 

Jang, I.Y., Kweon, O.H., Kim, K.E., Hwang, G.J., Moon, S.B., and Kang, A.S. Application of poly-sulfone (PSf) and polyether ether ketone(PEEK) tungstophosphoric acid (TPA) composite membranes for water electrolysis. Journal of Membrane Science, 322(1), 154-161, 2008. 

Poly(aciylic acid) (German technical PEEK Polyether ether ketone = Poly(oxy- 1,4-... 

In the last twenty years, many polymers have been used to make polymer nanocomposites. Thermoplastic polymers include nylon, polyaniline (PANI), " poly(s-caprolactone), polycarbonate (PC), polyether ether ketone (PEEK), polyethylene (PE), poly(ethyl acrylate) (PEA), polyisoprene (PI), polylactide (PLA), poly(methyl methacrylate) (PMMA), " polypropylene (PP), polypyrrole (PPy)," polystyrene (ps)/ i i7,27,30,49-64 poiy inyl acetate) (PVAc), poly(vinyl alcohol) (PVA), poly(vinyl chloride) (PVC) and thermoplastic polyurethane (TPU), and thermosets include Bakelite, butadiene rubber, epoxy,polydimethylsiloxane (PDMS), polyurethane (PU), styrene-butadiene rubber (SBR) and unsaturated polyester resin. 

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