Polyarylene ethers

The crosslinking of a sulfonylated polyarylene ether sulfone was accomplished by addition of CDI and bis-4-aminophenylsulfone as crosslinking agents [23] a) Activation of the sulfonic acid group... 

This research was an attempt to develop new polymers with the mechanical properties of polyarylene ethers and the dielectric properties of fluoropolymers. After initially testing the viability of the [2n+ 2n] cyclodimerization reaction for preparing high-molecular-weight polymers and testing the dielectric properties of these polymers, two polymers (one thermoplastic and one thermoset) were prepared in larger quantities to evaluate the thermal and mechanical performance of these novel compositions. The high Te thermoset was also quantitatively tested for thermal/oxidative stability. 

Xing, D. and Kerres, J. 2006. Improved performance of sulfonated polyarylene ethers for proton exchange membrane fuel cells. Polymers for Advanced Technologies 17 591-597. 

The Michael addition reaction of dimercaptodiphenylether with N-(3-ethynyl phenyl) maleimide allowed the synthesis of ethynyl-terminated imido-thioether as shown in Fig. 50 (139). This acetylene terminated imidothioether was blended with acetylene terminated polyarylene ether oligomers of different molecular weights and tested as composite resins (140). Blends of functionalized thermoplastics such as the acetylene terminated polyarylene ethers with brittle high-Tg imide resins are finding increased attention for tough high-Tg composites. 

Ti and Zr containing polytetramethylene oxide (PTMO) ceramic hybrid materials have lately been prepared by a sol-gel technique [61, 62]. Trialkoxy silane capped organic oligomer (PTMO or polyarylene ether sulfones) backbones with titanium isopropoxide or Zr-(n-propoxide) are used in this process ... 

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]. 

EP 323142 (European) 1989 Ternary polyether ketone blend wire insulations Pirelli General PLC, UK CK Alesbury, RJ Murphy Formulation shows excellent stress craze resistance, flexibility and flame resistance Blends of polyarylene ether ketones, polyether imides and polyfimide siloxanes) were coated onto wire for solvent resistance, O index and abrasion resistance. Blends without siloxane-imide copolymer did not meet these properties... 

Many amine-copper complexes, as well as a few amine complexes of other metals, and certain metal oxides have since been shown to induce similar reactions (17, 18, 22, 23, 30). This chapter is concerned largely with the mechanism of oxidative polymerization of phenols to linear polyarylene ethers most of the work reported has dealt with the copper-amine catalyzed oxidation of 2,6-xylenol, which is the basis for the commercial production of the polymer marketed under the trade name PPO, but the principal features of the reaction are common to the oxidative polymerization of other 2,6-disubstituted phenols. 

In polyesterification and other polycondensation reactions, polymer molecules condense with one another by the same mechanism by which they add monomer units. There is no immediately apparent explanation, however, for the coupling of two polyarylene ether molecules of structure I. Three possible routes were first outlined by Finkbeiner (13), and each has received some support since. 

Three polyarylene ethers having a M > 10,500 with dielectric constants of around 2.5 were prepared and used as low k dielectric layers in electronic applications. 

Polyarylene ethers were prepared using the Ullmann ether synthesis and had s in air of at least 310°C. 

Burgoyne [7] prepared polyarylene ethers containing grafted furfuryl, (IV), that crosslinked at low temperatures and were useful as dielectric or super high... 

Polyether ketones (PEEKs) are studied, but generally do not give performance advantages over Nation, although cost may be lower. Polyphenylene sulphonic acid membranes may improve performance at low humidity, and fluorinated polyarylene ethers may be produced at lower cost, but so far have low conductivity. Also, membranes based on bacterial cellulose with added precious metals have been investigated. Generally, hydrocarbon-based materials have lesser mechanical strength than the C-F based materials (Gil et ah, 2004 Lee et ah, 2004 Evans et ah, 2003). 

IMI has also developed a general route for the synthesis of homo- and hetero-disubstituted benzophenones such as 4,4 -difluorobenzophenone (DFBP), 4,3 -di-fluorobenzophenone, and 4,4 -diphenoxybenzophenone (DPOBP). These substituted benzophenones are important materials, with a variety of uses as specialty monomers (for polyether ketones and polyarylene ether ketones) and pharmaceutical intermediates. These benzophenones are prepared by utilizing Heck technology in conjunction with an oxidative cleavage reaction. 

Methylene-l,4-dioxaspiro-[4,5]deca-6,9-diene, another cyclic acetal, has been found to undergo the selective R-ROP to a polyarylene ether regardless of the small ring strain. This is due to the formation of a stable aromatic ring as the driving force (55). 

PAEPO polyarylene ether phosphine oxide PBU polybutadiene polyurethane... 

PDA production data acquisition PEPO polyarylene ether phosphine oxide... 

U. Eichenauer, E. Neufeld, A. Ludwig, T. Sauer, and A. Ulzhofer. Production of polyarylene-ether-sulfone useful for coating, especially to produce sliding surface. DE Patent 19 816955, assigned to Basf AG (DE), October 21,1999. 

Synonyms PEEK Polyarylene ether ether ketone Definition Partially cryst. thermoplastic with exc. chem./heat/flame/tear resist. compds. feature exc. flex, and tens. str. and elec, props, at high temps., toughness and abrasion resist. 

Polyarylene ether. See Polyphenylene ether Polyarylene ether ether ketone. See Polyetheretherketone... 

Polyarylene ether ketone. See Polyether ketone Polyarylether ketone resin CAS 55088-54-5 60015-05-6 Synonyms PAEK PEKEKK Poly (1,4-benzenedicarbonyl-alt-bis (4-phenoxyphenyl) methanone) Poly ether ketone ether ketone ketone Poly (oxy-1,4-phenylenecarbonyl-1,4-phenyleneoxy-1,4-phenylenecarbonyl-1,4-phenylenecarbonyl-1,4-phenylene) resin Classification Polymer... 

Uses Molded goods sol n. cast or extruded film structural parts tube and piping prosthetic devices optical parts windows computer and business equip. household appliances compact disks paints automotive parts electrical lighting modifier for other polymers reinforcing modifier for recycled polymers and alloys in blends with ABS, polyarylene ether, PBT, PET industrial fibers safety helmets, goggles unbreakable glazings (lamp housings) films food contact and medical applies. in cellophane for food pkg. food-contact surfaces... 

Synonyms PEEK Polyarylene ether ether ketone... 

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