Polyethylene oxide polymers

It has been outlined by several authors that the single macromolecule may be irreversibly bound because of the large number of weakly interacting segments. The first papers on the construction of polymer-coated silica adsorbents involved the physical adsorption of water-soluble polymers. Polyethylene oxides [28, 29] and poly-/V-vinylpyrrolidone [30] are examples of the stationary phases of this type. 

Sheth S, Dev V Jacobs H, et al. Prevention of subacute stent thrombosis by polymer-polyethylene oxide-heparin coating in rabbit carotid artery [abstr]. J Am Coll Cardiol 1995 25 348A. 

These dressings are sheets of three-dimensional networks of cross-linked hydrophilic polymers (polyethylene oxide, polyacrylamides, polyvinylpyrrolidone, carboxymethylcellulose, modified corn starch). Their formulation may incorporate up to 96% bound water, but they are insoluble in water and they interact by three-dimensional swelling with aqueous solutions. The polymer physically entraps water to form a solid sheet and they have a thermal capacity that provides initial cooling to the wound surface. A secondary dressing is required. 

A combination of two surfactants was studied in [279] ethoxylated nonylphenol of 150 moles EO (DNP 150) and adsorbing on the coal particle surface, and a water-soluble polymer polyethylene oxide (POE) the adsorption of which on the particles was not fixed. At a closely packed adsorption layers of DNP 150 on the surface of the coal particles and a minimum POE addition, a suspension was obtained which did not settle for 2 weeks. After this time, the suspension exhibited minimum settling without large increases in suspension viscosity. 

Leberman [10] observed that addition of 6 mg/ml of the flexible polymer polyethylene oxide (PEO), with molar mass M = 6 kDa and radius of gyration... 

Nonionic polymer Polyethylene oxide Hydrogen bonding <5... 

The applications of these techniques is illustrated by data on a variety of polymers, although the bulk of the discussion concerns a typical amorphous polymer, atactic polystyrene and a crystalline polymer, polyethylene oxide. A number of results are quoted which seem to indicate that phenyl group rotations or oscillations are not an important mechanism in the relaxation of polystyrene. Other materials mentioned are polypropylene oxide, starch and ionized copoly-... 

Co-electrospinning has been applied so far for the preparation of polymer core shell fibers, hollow polymer core shell fibers, hollow fibers composed not only of polymers, but also of ceramics, as well as for the immobilization of functional objects in droplets dispersed in the core that are arranged along the fiber axis. Among the examples reported in the literature are core shell fibers spun from polystyrene and polyethylene oxide, two kinds of polyethylene oxide (one with and the other without a chromophore), and core shell fibers with the electrically conductive polymer polyhexathiophene and the insulation polymer polyethylene oxide (Fig. 20). Hollow core shell fibers in which one polymer (polycaprolactone) forms the shell onto which the core material is deposited (polyethylene oxide) as inner wall is another example for the broad spectrum of fiber architectures which can be produced by coelectrospinning. The formation of the two-layer hollow fiber is based on the... 

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