Materials Literature
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Abstract The objective of this article is to review the use of conductive plastics in the shielding of electromagnetic interference (EMI). The theory of EMI shielding and evaluation methods of EMI materials are discussed. Different approaches in achieving high conductivity of plastics are reviewed. Emphasis is placed…
Carbonaceous clusters-supposed to be the carriers of electric conductivity-are formed along latent tracks of energetic ions in polymers. The different experimental techniques for cluster determination are summarized. Here we present some new results which have been derived from UV-Vis spectrometric examinations. Espec…
Abstract Adhesion between two substrates is a complex phenomenon which at present is still not well understood. The important existing adhesion models (electrical, diffusion, thermodynamic adsorption, chemical, etc.) are reviewed in order to try to explain their mechanisms. Thermodynamic adsorption is now believed to…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTComposition Factors Affecting the Water Vapor Permeability and Tensile Properties of Hydrophilic FilmsNicholas Parris, David R. Coffin, Remon F. Joubran, and Helmut PessenCite this: J. Agric. Food Chem. 1995, 43, 6, 1432–1435Publication Date (Print):June 1, 1995Publication H…
RATIONALE AND OBJECTIVES: The authors studied the long-term distribution of gadolinium (Gd) in mice and rats after the administration of four commercially available magnetic resonance imaging contrast media. The goals were to determine any possible product dissociation in vivo and to evaluate the effects that product…
Abstract Monte Carlo (MC) simulations of interlayer molecular structure in monolayer hydrates of Na-saturated Wyoming-type montmorillonites and vermiculite were performed. Detailed comparison of the stimulation results with experimental diffraction and thermodynamic data for these clay-water systems indicated good sem…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNew Narrow-Bandgap Polymer Composed of Benzobis(1,2,5-thiadiazole) and ThiophenesMichinori Karikomi, Chitoshi Kitamura, Shoji Tanaka, and Yoshiro YamashitaCite this: J. Am. Chem. Soc. 1995, 117, 25, 6791–6792Publication Date (Print):June 1, 1995Publication History Published…
Abstract Monte Carlo (MC) simulations of molecular structure in the interlayers of 2:1 Na-saturated clay minerals were performed to address several important simulation methodological issues. Investigation was focused on monolayer hydrates of the clay minerals because these systems provide a severe test of the quality…
A new family of high‐temperature, oxidation‐resistant, ceramic composites, with (La)‐monazite (LaPO 4 ) serving as a weakly bonded interphase, is proposed. Monazite is stable and phase‐compatible with alumina at temperatures at least as high as 1750°C in air. Especially important for use in high‐toughness composites,…
The amorphous compound MoS3 has been investigated by monochromatic X-ray photoemission ( X P S) and vibrational spectroscopy, as well as by chemical extrusion aimed at identifying structural units inside MoS3. XPS shows that all molybdenum in MoS3 occurs in the 4-t oxidation state, while sulfur is present in at least…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and Processing of Improved Organic Second-Order Nonlinear Optical Materials for Applications in PhotonicsL. R. Dalton, A. W. Harper, R. Ghosn, W. H. Steier, M. Ziari, H. Fetterman, Y. Shi, R. V. Mustacich, A. K.-Y. Jen, and K. J. SheaCite this: Chem. Mater. 1995, 7…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDrainage of a Thin Liquid Film Confined between Hydrophobic SurfacesOlga I. VinogradovaCite this: Langmuir 1995, 11, 6, 2213–2220Publication Date (Print):June 1, 1995Publication History Published online1 May 2002Published inissue 1 June 1995https://pubs.acs.org/doi/10.1021/l…
The review gives a systematic account of the results of detailed studies of the vibrational spectra of a series of industrial amorphous highly disperse silicas (aerosil, silica gel, aerogel) with the aid of inelastic neutron scattering. The observed phenomenon of technological polymorphism and the results of the quant…
Abstract A method for real‐time nondestructive monitoring of small molecules diffusion in polymeric films was developed. The method was based on detection of a fluorescent tracer eluting from the investigated polymer film into the solution in which this film was immersed. The kinetics of the tracer elution, monitored…
Abstract Polyethylene–kaolin composites were investigated with a special emphasis on the control of the interfacial adhesion. Both matrix and filler were modified for this purpose. A stearic acid and maleic anhydride‐grafted polyethylene were used as potential interfacial agents and the efficiency of aminosilane‐surfa…
Abstract The selective dynamic crosslinking reaction by means of the N , N '‐ m ‐phenylene–bismaleimide/poly‐(2,2,4‐trimethyl‐1,2‐dihydroquinoline) system was carried out on PP/EPDM blends and its effect on the Izod impact strength (IIS) was investigated. Three series of PP/EPDM combinations were adopted to establish…
The review surveys data on the known structures of polyoxometalates. The changes in this field which have occurred in the last ten years are traced. Heteropolyacids are considered in detail as a special case of polyoxometalates: their composition and structure, methods of synthesis, stability, and acidity. The bibliog…
First-principles calculations based on density functional theory (DFT) and the pseudopotential method have been used to study the stoichiometric and reduced SnO2 (110) surface. The ionic relaxations are found to be moderate for both the stoichiometric and reduced surfaces, and are very similar to those found in recent…
In a recent PRL, Gonze et al claim that the density functional theory in Hohenberg-Kohn formulation is not valid for crystalline solids in a homogenious electric field. They introduce another theory, density-and-polarization functional theory, which has to substitute the DFT in the calculations of the long-wave dielec…
The low-temperature specific heat for non-magnetic Mg 42 Y 8 Zn 50 quasicrystal has been investigated to get information on the electronic structure. The electronic specific heat coefficient gamma is estimated to be 0.63 mJ mol -1 K -2 , which is about 70% of the value expected from the free-electron model. This small…