Poly oxy

POLYETHERS - TETRAHYDROFURAN AND OXETANE POLYTffiRS] (Vol 19) Poly[oxy(dimethylsilylene)] [9016-00-6]... 

Homopolymers of PO and other epoxides are named a number of ways after the monomer, eg, poly(propylene oxide) (PPO) or polymethjioxirane from a stmctural point of view, polyoxypropylene or poly(propylene glycol) or from the Chemicaly hstracts (CA) name, poly[oxy(methyl-l,2-ethanediyl)], a-hydro- CO-hydroxy-. Common names are used extensively in the Hterature and in this article. 

M. Zulauf, K. Weckstrom, J. B. Hayter, V. Degiorgio, M. Corti. Neutron scattering study of micelle structure in isotopic aqueous solutions of poly(oxy-ethylene) amphiphiles. J Phys Chem 29 3411-3417, 1985. 

Nitriles react with alcohols in the presence of hydrochloric acid to form iminoester hydrochlorides, which are hydrolyzed to the esters (Pinner synthesis). Heitz and coworkers [21-23] published several fine papers on the polyazoester synthesis from the reaction of a series of poly(oxyethylene) glycol or poly(oxypropylene) glycol and AIBN in the presence of dry hydrochloric acid at 0-5°C according to Pinner synthesis. Condensation reactions of ACPC and dihydroxy terminated poly(oxy-ethylene) glycol yield polyazoesters [24,25]. 

Polyoxyethylene sorbitan monooleate (x)-sorbitan mono-9-octade-cenoate poly(oxy-l,2-ethanediyl)... 

Dimethyl terephthalate (DMT), 13, 69 repolymerization of, 561 -562 Dimethyl terephthalate/1,4-butanediol/di-hy droxy -poly (oxy tetramethylene) reaction, 108-109... 

The reactions proceed with an e.e. of about 80% when the enantiopure ligand is used. Similar conditions using poly[oxy(methylsilylene)] (PMHS) as the hydride donor lead to reduction of aryl ketones with up to 98% e.e.188... 

Verdet and Stille1 employed brominated poly(phenylene oxide) intermediates in an effort to synthesize more stable catalyst supports containing (cyclopentadienyl)metal complexes. Treatment of poly(oxy-2,6-dimethyl-l,4-phenylene) with N-bromosuccinimide under photolytic conditions produced only the bromomethyl derivative if the D.F. did not exceed 0.35. Subsequent treatment of the bromomethylated polymer with sodium cyclopentadienide afforded the cyclopentadienyl functionalized polymer, 5, but the reaction was accompanied by crosslinking and it was not possible to remove the bromomethyl substituents quantitatively. 

An alternative synthesis of a thermally stable cyclopentadienyl functionalized polymer involved ring bromination of poly(oxy-2,6-diphenyl-l,4-phenylene), followed by lithiation with butyl lithium to produce an aryllithium polymer. Arylation of 2-norbornen-7-one with the metalated polymer yielded the corresponding 2-norbornen-7-ol derivative. Conversion of the 7-ol to 7-chloro followed by treatment with butyl lithium generated the benzyl anion which undergoes a retro Diels-Alder reaction with the evolution of ethylene to produce the desired aryl cyclopentadiene polymer, 6. 

Poly[oxy-1,4-phenylene-(1 -methylethylldene)-l, 4 -phenylene-oxy-(2"-cyano)-l",3"-phenylene], 20, was prepared from bisphenol-A and 2,6-dichlorobenzonitrile according to the precedure of McGrath et al.21... 

Reduction of Poly(2-cyano-l,3-phenylene arylene ether), 20 Twenty-five mL of a 1.0 M solution of lithium aluminum hydride (LAH) in THF was cooled to 0° C before adding a solution of 1.64 g (5.0 meg) of 20 in 120 mL of THF. The resultant slurry was stirred for 24 h at 0° C, refluxed for 1 h, recooled to 5° C, and the excess LAH decomposed with 2 mL of water. The volume of the solution was reduced to 25 mL before pouring the mixture into 500 mL of 5% HC1 to dissociate the amine aluminum salt complex and precipitate the polymer. The polymer was recovered by filtration, reslurried in 20 mL of water and the pH adjusted to 9.0 with NaOH. After recovery of the neutralized polymer was recovered, it was dried in vacuo redissolved in CHC13, and reprecipitated using water as the nonsolvent. Final drying in vacuo for 24 h at 35° C left 1.2 g (72.3%) of poly[oxy-l,4-phenylene-(l-methylethylidene)-l, 4 -phenylene-oxy-(2"-aminomethyl)-l",3"-phenylene], 21, [n] (CHCI3) 0.3 dl/g. 

Since poly(oxy-2,6-dimethy1-1,4-phenylene) has exhibited a high tendency to undergo cleavage, rearrangements and to crosslink in the presence of electrophilic reagents,21 our attention has been focused on modification of poly(arylene ether sulfone), 1, and phenoxy resin,4 The active sites in these polymers are the 3-positions of the bisphenol-A repeating units. We will report the extent of... 

Correct IUPAC nomenclature poly(oxy-2,6-dimethyl-l,4-pheylene), PPO, poly(oxy-l,4-phenylenesulfonyl-l, 4 -phenyleneoxy-l",4 phenylene (1 -methylethylidene)-l , 4" -phenylene), poly(arylene ether sulfone), and poly(oxy-(2-hydroxytrimethylene) oxy-l,4-phenylene(l -methylethylidene)-l, 4 -phenylene), phenoxy resin. 

See Poly [oxy (methy l)sily lene] 1-Allyloxy-2,3-epoxypropane See other allyl compounds, i,2-epoxides... 

Chemical name Sorbitan mono-9-octadecenoate poly (oxy-l,2-ethanediyl) derivatives... 

Fluorophenyl)sulf onyl]phenoxy]phenyl]-1-methyl-ethyl ]phenyl]- -[4-[(4-fluorophenyl)sulf onyl]phenoxy]poly[oxy-1, 4-phenylenesulfonyl-1,4-phenyleneoxy-l,4-phenylene(1-methyl ethylidene)-l,4-phenylene] III... 

Formerly, the stmcture-based name, poly[oxy(l-methylethylene)], would have heen acceptable for this molecule but longer is (see page 257 for an explanation of traditional names, strueture-based names and source-based names of polymers). 

Polymerization of trichloroacetaldehyde in bulk using an optically active initiator gives an isotactic polymer, poly oxy[(trichloromethyl)methylene], of high optical activity owing to the formation of the helical polymer molecules with units of predominantly one chirality sense. 

If named according to the mles for regnlar single-strand organic polymers [1], the polymers on lines 1 and 5 would be oriented and named poly(dimethylstannanediyl) and poly[oxy(diphenylsilanediyl)] respectively. 

CH2)2-0-C hC-0 0 — 0 poly(phenylene oxide) poly(ethane-1,2-diyl terephthalate) poly(oxy-1,4-phenylene) poly(oxy ethane-1,2-diyloxy-terephthaloyl)... 

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