Polyethylene matrix

Cd ion-selective electrodes The usual version of the Cd " ISE contains a membrane of a sintered or pressed mixture of CdS and Ag2 S [121, 325,408]. Membranes from sintered Ag2S, CuS and CdS mixtures [157] have also been proposed, similarly as forPb ISEs. CdS precipitate in a polyethylene matrix [250] or a CdS-Ag2S precipitate mixture in a silicone rubber matrix [153] can also be used for Cd ISEs. Cd ISEs can be calibrated using a metal diethylenetriamine buffer [66]. Similar substances interfere in the response of the Cd ISE as for the Hg, Ag and Cu electrodes. 

A chemical blowing agent was well dispersed in a linear low density polyethylene matrix, in pellet form. The pellets were rotationally moulded to produce foams, the morphology of the foams being studied using optical microscopy. The quality of the cell structures in terms of cell size, cell population density and volume expansion ratio was superior to that of foams produced by drying blending. 28 refs. 

Notes Col. 1. — (i) PE-PSSA polystyrene sulphonic acid grafted onto a polyethylene matrix and containing indicated amounts of divinyl benzene 120) (ii) Ionac MC-3470 (Ionac Corp., USA) powdered mixture of PSSA ion exchanger and inert polymer compressed hot with embedded mesh of supporting material120) (iii) Cellophane PUT 600/23 sheet (British Cellophane Ltd.) washed to remove plasticizer110) (iv) Dye A C. I. Direct Blue 1 (tetrasulphonate substantive dye)110 (v) Dye B Procion Yellow HA (disulphonate reactive dye, I.C.I. Ltd.)121. ... 

Figure 3. Reaction schemes for modification of the glass surface by the azidofunctional alkoxysilane (reaction 1) and reaction of the modified glass surface with the polyethylene matrix (reaction 2).

The wide bands of dielectric losses occur in the region from 10 Hz to 10 MHz for many organic species doped into a predeuterated polyethylene matrix at 4.2 K [Gilchrist, 1991]. The relaxation is caused by tunneling transitions between several equilibrium positions of OH or NH2 groups. The bandwidth is determined by the distribution of barrier parameters in amorphous matrix. 

Large number of dicarboxylic acids, keto-acids and/or lactones indicated severe degradation of the polyethylene matrix [37, 38, 95]. Dicarboxylic acids were the most abundant products formed during photo-oxidation and their amount increased especially after long irradiation times, i.e. in severely degraded samples [96]. The relationship between the degree of oxidation/ degradation in the polymer matrix and the amount of dicarboxylic acids... 

A1203 matrix [38], nanoscale FeOOH particles [39], dispersed ultrafine Mn-Zn ferrite particles [40], polydispersed ferrite particles in a magnetic fluid [41], Fe-based nanoparticles in a polyethylene matrix [42], a granular Cu-Co alloy [43] and maghemite (/-Fe203) nanoparticles in ferrofluids [32], No... 

Figure 12.15). In the case of MWNTs, the shift to higher frequencies was explained by a disentanglement of the carbon nanotubes and a subsequent dispersion in the polymer as a consequence of polymer penetration into the bundles during solution mixing. An up-shift of 17 cm-1 for the G band, obtained on addition of 1 wt% MWNTs in a polyethylene matrix, was considered as a consequence of strong compressive forces associated with polymer chains on MWNTs (87). 

Kim M, Saito K, Eumsaki S, Sugo T, and Ishigaki I. Protein adsorption capacity of a porous phenylalanine-containing membrane based on a polyethylene matrix. J. Chromatogr. 1991 586 27-33. 

Detonation nanodiamond has been coveted by Fe-, Co-, Ni-, Zn-, and Ce-containing nanoparticles prepared via themial destruction of metal-containing compounds. Composites comprised of the nanodiamonds covered by Fe- and Co-containing nanoparticles embedded within low density polyethylene matrix have been produced. 

The gel swelling results can be explained by assuming that the E//E/ABP blends are two-phase materials with domains of E/ABP dispersed in a polyethylene matrix. this picture, a significant fraction of the matrix would have no contact with the crosslinking copolymer and would remain soluble after photolysis, leading to low maximum gel fractions. 

The Gyna-ir Correlation can be sharpened by the two-phase argument. With the crosslinking agents confined to their own phase, the quantity of gel should be determined by the total surface area of that phase and, hence, the dispersion of the E/ABP in the polyethylene matrix. If we assume that better blending is achieved by matching the component melt viscosities, then Qninv should be dependent on the sensitizer melt index (MI), the relative volumes of the components -blend ratio, BR - and the total sensitizer concentration (Co). From least squares analyses of our results, we find ... 

Oya, A. and Kasahara, N. (2000). Preparation of thin carbon fibers from phenol-formaldehyde polymer micro-beads dispersed in polyethylene matrix. Carbon, 38, 1141-4. 

During photo-oxidation, dicarboxylic acids were the class of products that clearly increased in the most severely degraded samples. As during thermooxidation, the most abundant of the dicarboxylic acids was butanedioic acid. Comparison between the number average molar mass and the relative amount of butanedioic acid, Fig. 6, showed a connection between the formation of butanedioic acid and the degree of degradation in the polyethylene matrix. However, the relative sum of all the carboxylic acids correlated even better with the number of chain scissions than the amoimt of only butanedioic acid. Fig. 7. 

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