Sulfones ketones

Recently, Dutta and Maiti [21] reported nitro displacement polymerization of the bisphenol dianion with the sulfone activated dinitro aromatic compounds. In addition, there have been recent reports of the development of functionalized PEEK [22] and polyether sulfone ketone (PESK) [23] that are comparable to commercially available high performance polymers. 

Recently, the pyrazole group containing bisphenols have been synthesized from activated aromatic dihalides and 3,5-bis (4-hydroxy phenyl)-4-phenyl pyrazole or 3,5-bis(4-hydroxy phenyl)-1,4-diphenyl pyrazole. A novel synthesis of imido aryl containing bisphenols has been reported [32]. N-substituted l,4-bis(4-hydroxy phenyl)-2,3-naphthalimides were prepared from phenolphthalein and copolymerized with aromatic sulfone or ketone difluorides to obtain the poly(imidoaryl ether) sulfones/ ketones. 

A wide variety of high-performance polymeric materials have been synthesized by incorporating thermally stable moieties such as sulfone, ketone, or aryl or alkyl phosphine oxide in addition to the ether linkage in poly(arylene ether)s. 

Further lowering the dielectric constants has been achieved by preparing highly fluorinated polyethers without any sulfone, ketone, or other polarizable groups.239 241 Typically, the /jara-lluorinc atoms on highly fluorinated aromatic compounds, such as hexafluorobenzene and decafluorobiphenyl, are activated and thus can go through aromatic nucleophilic substitution with HFBPA under typical reaction conditions (Scheme 6.31).217... 

Poly(ketone) (12) and poly(sulfone ketone) (14) are produced according to Scheme (9). They contain significant numbers of phenylene units substituted in p- and o-positions in addition to the m-phenylene units. 

See also 3,4 -Diaminodiphenyl ether (3,4 ODA) ODA/PPTA fibers Polyfp-phenylene terephthalamide) (PPTA) commercial process for, 19 721-723 wet spinning of, 19 725 Copolyfp-phenylene sulfide sulfone/ ketone) s, 23 710... 

Phosphinic acid Sulfonamide Sulfone Ketone hydrate... 

Cyanoborohydride and its modified reagents have been used for reductive dehalogenations. Thus, the combination of sodium or tetrabutylammonium cyanoborohydride, sodium or potassium 9-cyano-9-hydro-9-borabicyclo[3.3.1]nonanate [9-BBNCN] (2) or polymeric cyanoborane (3) in HMPA furnishes an efficient and mild system for the reduction of alkyl halides. The reagents are selective in that other functional groups, including ester, carboxylic acid, amide, cyano, alkene, nitro, sulfone, ketone, aldehyde and epoxide, are essentially inert under the reduction conditions thus, the reduction procedure is attractive for synthetic schemes which demand minimum damage to sensitive portions of the molecule. 

Moreover, by means of the method of luminescent-kinetic spectroscopy we have shown that Eu(III) ion in excited state forms more stable complex (up to two orders of magnitude) with sulfoxides, sulfones, ketones and amines then that in ground state. Since it is known that excitation of the europium is caused by electron transitions in the inner metal-centered 4f-states, our findings testify that f-electrons participate in the chemical bonding. 

But of prime importance with regard to the final separation process is the nature of the membrane-forming polymer its hydrophihdty, charge density, polymer structure and molecular weight Typical polymers used in this phase-separation process are cellulose esters (most commonly CA), polyamides, poly(amide-hydra-zides), polyimides, (sulfonated) polysulfones, poly(phenylene oxide) and (sulfona-ted) poly(phthalazine ether sulfone ketone). 

Poly(phthalazinone ether sulfone ketone) PPESK... 

The majority of polymer membranes used for microfiltration and ultrafiltration of liquids are prepared by the wet phase inversion process. Such membranes exhibit a typical asymmetric structure characterized by a thin dense surface layer and a thick microporous bulk. Poly(phthalazinone ether sulfone ketone) (PPESK) copolymers, c.f. Figure 7.10, show glass transition temperatures in the range of 263-305°C. The polymers show an outstanding chemical stability. They are soluble only in 98% H2SO4. Concentrated aqueous solutions of sodium chlorate, hydrogen peroxide, acetic acid, and nitric acid show no effect. ... 

Y. Dai, X. Jian, S. Zhang, and M. D. Guiver. Thermostable ultrafiltration and nanoflltration membranes from sulfonated poly(phthalazinone ether sulfone ketone). J. Membr. ScL, 188(2) 195-203, July 2001. 

Y. Yang, D. Yang, S. Zhang, J. Wang, and X. Jian. Preparation and characterization of polyCphthalazinone ether sulfone ketone) hollow fiber ultra-filtration membranes with excellent thermal stability. J. Membr. Sci., 280 (l-2) 957-968, September 2006. 

M. Li, H. Zhang, and Z.-G. Shao. Quatemized poly(phthalazinone ether sulfone ketone) membrane doped with H3PO4 for high-temperature PEMFC operation. Electrochem. Solid-State Lett., 9 A60-A63, 2006. 

H. Kuwahara, T. Kawaguchi, S. Ohmori, and S. Matsumura. Application of sulfone, ketone and ester containing polyalkyl ether units to medical materials. US Patent 5 969 082, assigned to Teijin Limited (Osaka, JP), October 19, 1999. 

PAN, polyacrylonitrile PP, polypropylene PPSU, polyphenylsulfone PPBES, copoly(phthalazinone biphenyl ether sulfone) PPESK, poly(phthalazinone ether sulfone ketone) PPENK, poly(phthalazinone ether nitrile ketone) PMDA/ODA PI, poly(pyromellitic dianhydride-co-4,4 -oxydianiline). 

Dai, Y, Jian, X., Zhang, S., and Guiver, M. D. 2002. Thin film composite (TFC) membranes with improved thermal stability from sulfonated poly(phthalazinone ether sulfone ketone) (SPPESK). Journal of Membrane Science 207 189-197. 

B. Bae, K. Miyatake, M. Watanabe, Sulfonated poly(arylene ether sulfone ketone) multiblock copolymers with highly sulfonated block. Synthesis and properties. Macromolecules 2010,43(6), 2684-2691. 

The sodium acetylide solution thus prepared may be used for a variety of organic syntheses by the addition of alkyl halides, sulfates, sulfonates, ketones, aldehydes, and esters. Where a fine suspension of the dry acetylide is desired in an inert solvent such as ether or a hydrocarbon, the solvent is added to the ammonia solution and the mixture is stirred whde the ammonia is evaporated. Extra solvent must be used to replace that entrained by the ammonia, the last traces of which are removed by a period of refluxing. Such a suspension gives better yields of, for example, propiolic acid (by the reaction with carbon dioxide) than sodium acetylide prepared in any other way. 

A suitable polymer material for preparation of carbon membranes should not cause pore holes or any defects after the carbonization. Up to now, various precursor materials such as polyimide, polyacrylonitrile (PAN), poly(phthalazinone ether sulfone ketone) and poly(phenylene oxide) have been used for the fabrication of carbon molecular sieve membranes. Likewise, aromatic polyimide and its derivatives have been extensively used as precursor for carbon membranes due to their rigid structure and high carbon yields. The membrane morphology of polyimide could be well maintained during the high temperature carbonization process. A commercially available and cheap polymeric material is cellulose acetate (CA, MW 100 000, DS = 2.45) this was also used as the precursor material for preparation of carbon membranes by He et al They reported that cellulose acetate can be easily dissolved in many solvents to form the dope solution for spinning the hollow fibers, and the hollow fiber carbon membranes prepared showed good separation performances. 

Wang Hong Hua., Ding Jin., Chen Tian Lu. (2004). Cyclic Ohgomers of Phenol-phthalein Polyaiylene Ester Sulfone (ketone) Preparation Through Cyclo-Depoly-merization of Corresponding Polymers. Chin. Chem. Lett, 15(11), 1377-1379. 

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