Polymers loaded

The process of chain adsorption on mineral aggregates immersed in a molten polymer generates loops and tails on the surface of the filler a chain structure thus appears. In 

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A continuous polymer anode system has been developed specifically for the cathodic protection of buried pipelines and tanks. The anode, marketed under the trade name Anodeflex , consists of a continuous stranded copper conductor (6AWG) which is encased in a thick jacket of carbon-loaded polymer, overall diameter 12-5 mm. To prevent unintentional short circuits an insulating braid is sometimes applied to the outer surface of the conductive polymer. 

Immediately upon fracture the fibre drops from a high-energy state equal to the stored elastic energy to its lowest energy, viz. the unloaded state. Hence, initiation of fracture in the domains in the tail of the orientation distribution p(0) does release most effectively the stored energy of a loaded polymer fibre. So, if there are no impurities and structural irregularities, fracture of the fibre is... 

Suzuki, T. M., Tanaka, D. A. P., Tanco, M. A. L., Kanesato, M., H., Yokoyama, T., Adsorption and removal of oxo-anions of arsenic and selenium on zirconium(IV) loaded polymer resin functionalized with diethylenetriamine-N, N,N ,N -polyacetic acid, J. Environ. Monit., 2, 2000, 550-555. 

ROMP-Spheres A Novel High-Loading Polymer Support Using Cross Metathesis between Vinyl Polystyrene and Norbor-nene Derivatives, A. G.M. Barrett,... 

Several studies have considered the influence of filler type, size, concentration and geometry on shear yielding in highly loaded polymer melts. For example, the dynamic viscosity of polyethylene containing glass spheres, barium sulfate and calcium carbonate of various particle sizes was reported by Kambe and Takano [46]. Viscosity at very low frequencies was found to be sensitive to the network structure formed by the particles, and increased with filler concentration and decreasing particle size. However, the effects observed were dependent on the nature of the filler and its interaction with the polymer melt. 

The key component of the optical recording system is the recording medium, which is marked in one step and read in another step with a laser beam. Many materials have been considered for the purpose, including metal-films, organic dyes, dye-loaded polymers, metal-loaded polymers, discontinuous metal films, thermal coloration systems and bilayers (1-19). Tellurium- and gold-based optical disks have been the most widely studied materials to date. 

Biswas and Mazumdar [49, 50] reported a similar enhancement of thermal stability on metal ion incorporation for the poly-condensate PMDA-BP/BPA/M, (Fig. 2) with the following features of interest (1) With a typical metal ion incorporated in either PMDA-BP or PMDA-BPA, initial decomposition temperature of the metal-loaded polymers does not change significantly PMDA-BP (238 °C) PMDA-BPA (235 °C), PMDA-BP-Fe(III) (280 °C), PMDA-BPA-Fe(III) (290 °C), PMDA-BP-Cu(II) (265 °C), PMDA-BP-Ni(II) (265 °C), PMDA-BP-Ni(II) (263 °C), PMDA-BPA-Ni(II) (280 ° ). (2) With either PMDA-BP or -BPA, the effect of different metal ions on the stability is in the order Fe3+ > Ni2+ > Cu2+ (upto 4% decomposition) in the BPA complex, and upto 25% in the BP complex. (3) Beyond this temperature, the order in stability becomes same in either system Fe3+ > Cu2+ > Ni2+. 

Most metal-loaded polymers are less affected by chloride and sulfate interferences than strong-base resins (Dambies, 2004, 608). However, As(V) sorption with iron-loaded polymers may still be seriously hindered by fluoride, sulfate, chloride, or phosphate in the water. Furthermore, chloride and sulfate may... 

Figure 6. Positive ion SSIMS spectrum of 10% wt/wt indomethacin loaded polymer beads.

The preparation of biodegradable microspheres by a solvent evaporation process using sodium oleate as the emulsifier was described in previous publications (1.21. A number of process parameters (such as drug loading, polymer molecular weight, polymer composition and initial polymer solution concentration) were studied to determine their effects on the release of drugs from biodegradable microspheres. 

Drug release may be affected by a number of process parameters such as drug loading, polymer molecular weight, polymer composition, initial concentration of the polymer in the organic phase of the emulsion, amount of emulsifier, stirring speed, vacuum pressure, solvent evaporation time and temperature. These parameters were kept constant and only the amount of NaOH was varied. Therefore, changes in the in vitro release curves should reflect only the effect of NaOH in various concentrations. ... 

Characterization. All measurements were carried out with dried specimens (particles or sheets). It is established that the thickness of the water-loaded polymer layer is higher than in the dried state, because dried polymer coils collapse [21], The amount of polymer, however, is not changed after the drying process. Thus an average equilibrium state is always measured. 

Solid scintillators include materials such as sodium iodide, lithium iodide, anthracene, naphthalene and loaded polymers. Sodium iodide detectors are by far the most important, and subsequent discussions will be restricted to... 

The field dependence of mobility is observed to be Poole-Frenkel-like over a wide range of applied voltage. This has been observed both for pure polymers, e.g. PVK, and molecularly loaded polymers, e.g. DEH and TAPC in polycarbonate. Data for loaded systems are shown in Fig. 8.29. The fit to the DEH data is obtained using the full analytical expression derived by Dunlap et al. (1996). 

FIGURE 9.7 Autoradiogram (top) and unstained photograph (bottom) obtained from a coronal section of rat brain 48 hours after implantation of a I-labeled NGF-loaded polymer. Bars = 23 mm. (Reproduced with permission from Krewson CE et al. Brain Res 1995 680 196-206.)... 

Several types of copper-loaded polymer have been prepared. Hydrocarbon spacers were introduced between polystyrene and copper (23). Six synthetically useful copper-promoted reactions including a Diels-Alder reaction, an epoxide ring-opening, and an aryl iodide hydrolysis were examined by using the polymeric catalyst [34]. Use of the copper-loaded polymers often either improved the yield or reduced the reaction time compared with those for conventional copper salts. 

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