Polyethylene oxide . See

Bromoform, Cyclic polyethylene oxides See Bromoform Cyclic polyethylene oxides, etc. 

Draw schemaucally the DSC curve of the block copolymer of polybutylene terephtalate and polyethylene oxide (see also problem II - 9)... 

One mobile phase contains polyethylene oxide (M = 300,000) (For details see Table II). Mobil phaseflow rate 4.2 mL/min ( ) water ( ) mobile phase containing polyethylene oxide (Mw = 300,000) (M) O.OOIU NaCl (%) 0.005U NaCl (0) 0.02SM NaCl (A) 0.050M NaCl (A) O.IOOM NaCl (O) 0.5M NaCl. 

Poly(ethylene oxide) (PEO), 10 665, 673-674 13 540, 542-543, 731. See also Ethylene oxide polymers association reactions of, 10 682 behavior in solution, 10 685 commercial block copolymers, 7 648t crystallinity of, 10 690 as a flocculating agent, 11 630-631 low molecular weight, 14 259 oxidation of, 10 682 in paper manufacture, IS 117 preparation of, 20 462 Polyethylene oxide chains, in cationic surfactants, 24 147... 

Table 2 Data corresponding to polyethylene oxide) (PEO) spheres prepared by different methods (see Fig. 4)...

Solubility. Polyethylene oxide) is completely soluble in water at room temperature. However, at elevated temperatures (>98° C) the solubility decreases. It is also soluble in several organic solvents, particularly chlorinated hydrocarbons (see WATER-SOLUBLE polymers). Aromatic hydrocarbons are better solvents for polyethylene oxide) at elevated temperatures. Solubility characteristics are Us ted in Table 1. 

Poly(oxyethylene) resins. See Polyethylene oxide) polymers. 

As cyclic polyethers (polyethylene oxides), some of this group of aprotic complexing solvents may be subject to peroxidation, though no reports have been so far noted. See 1,4,7,10,13,16-Hexaoxacyclooctadecane ( 18-Crown-6 )... 

Linear viscoelastic measurements using infrared dichroism on the compatible blend polyethylene oxide) and poly(methyl methacrylate) were reported by Zawada et al. [139]. Unlike Monnerie and coworkers [127], who reported seeing only orientation in the PMMA component, and none in the PEO, Zawada et al. observed alignment in the PEO. However, since the PEO was of lower molecular weight (as was the case for Monnerie and coworkers), its relaxation timescales were substantially faster than the PMMA. This may explain the lack of any measurable orientation by Monnerie and coworkers, who studied quenched samples, since their preparation may have allowed the PEO to relax prior to testing. 

Lead and mercury are deposited as micron-sized clusters, predominantly at intercrystallite boundaries [105] so does lithium from the polyethylene oxide solid electrolyte. What is more, Li intercalates into the sp2-carbon [22, 138], Thus, observations on the Li intercalation and deintercalation enable one to detect non-diamond carbon on the diamond film surface. Copper is difficult to plate on diamond [139], There is indirect evidence that Cu electrodeposition, whose early stages proceed as underpotential deposition, also involves the intercrystallite boundaries [140], We note that diamond electrodes seem to be an appropriate tool for use in the well-known electroanalytical method of detection of traces of metal ions in solutions by their cathodic accumulation followed by anodic stripping. The same holds for anodic deposition, e.g. of, Pb as PbCh with subsequent cathodic reduction [141, 142], Figure 30 shows the voltammograms of anodic dissolution of Cd and Pb cathodically predeposited from their salt mixtures on diamond and glassy carbon electrodes. We see that the dissolution peaks are clearly resolved. The detection limit for Zn, Cd, and Pb is as low as a few ppb [143]. 

One polymer that isoften used in these products is poly ethylene oxide) (PEO), a polymer most often prepared by the ring-opening polymerization of ethylene oxide (see Table 5-3). Alternatively, it is sometimes prepared by a step-growth polymerization of ethylene glycol, in which case it is called polyethylene glycol) (PEG). PEO/PEG is a water-soluble polymer that can be synthesized to a molar mass in the millions. 

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