Materials Literature
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We present mechanisms for sidebranch generation in dendritic growth, stressing the importance of nonlinear effects. One such mechanism, which we call solvability-induced sidebranching, relies on the fact that the steady states form a discrete family. In addition, time-dependent simulations of crystal growth in the bou…
The Cu4Cd 3 structure, cubic with a = 25.87/k and 1124 atoms in the unit cell, has been analyzed and described in terms of octahedra and tetrahedra. The structure is described as an intergrowth of blocks of the pyrochlore structure, of the Cu metal structure and also of the MgZn 2 and MgCu2 structures. Parameters of t…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAvermectin chemistry: problems of conjugation, deconjugation, and epimerizationBert Fraser-Reid, Heinz Wolleb, Ramine Faghih, and Joseph Barchi Jr.Cite this: J. Am. Chem. Soc. 1987, 109, 3, 933–935Publication Date (Print):February 1, 1987Publication History Published online1…
We prepared ultrafine germanium particles by gas-evaporation techniques. The particle composition was studied by Raman and x-ray scattering. We take an analytical model to explain the Raman profile: the particle is composed of a single-crystalline core and a coating amorphous shell. In this single-crystalline part, th…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructure of iodide ions in iodinated nylon 6 and the evolution of hydrogen bonds between parallel chains in nylon 6N. S. MurthyCite this: Macromolecules 1987, 20, 2, 309–316Publication Date (Print):February 1, 1987Publication History Published online1 May 2002Published inis…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTKinetics and mechanism of the catalyzed epoxidation of oleic acid with oxygen in the presence of benzaldehydeMing Chao Kuo and Tse Chuan ChouCite this: Ind. Eng. Chem. Res. 1987, 26, 2, 277–284Publication Date (Print):February 1, 1987Publication History Published online1 May…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSilicon-29 chemical shifts in sodalite materialsJ. M. NewsamCite this: J. Phys. Chem. 1987, 91, 5, 1259–1262Publication Date (Print):February 1, 1987Publication History Published online1 May 2002Published inissue 1 February 1987https://pubs.acs.org/doi/10.1021/j100289a044htt…
Reliability analysis should enable an engineer to select an allowable stress that will permit a ceramic component to function of the expected lifetime with an acceptably low probability of failure. Three approaches have been used to assure the reliability of ceramics: designing probablistic, nondestructive evaluation…
Abstract Über Röntgen‐ und Neutronenbeugungsexperimente an pulverförmigen Proben wurde die Kristallstruktur von BaH 2 bzw. BaD 2 neu bestimmt. Sie entspricht der des Calciumdeuterids [1, 2] und zeigt, daß die seinerzeit von Zintl und Harder [3] angenommenen Wasserstoffpositionen nicht zutreffen. Die Einordnung des Bar…
Abstract Experimental studies on the solid‐state polymerization (SSP) of polyethylene terephthalate (PET) for the particle sizes of 14–16 mesh at 170–200°C and for the particle sizes of 14–18 mesh at 210–240°C are carried out under a vacuum of about 60 mtorr. Analysis of the data of the concentrations of hydroxyl and…
A self-consistent macroscopic thermodynamics is developed for the calculation of work, heat, and dissipation for thermodynamic paths of the shape memory alloy, Nitinol. The thermodynamic system analyzed is a Nitinol helix for which extensive force–length–temperature (FLT) equation of state measurements have been made.…
Abstract Blends of various poly(aryl ether ketones) have been found to exhibit a range of miscibility and isomorphic behavior. This range is dependent on molecular weight; however, for poly(aryl ether ketones) with number‐average molecular weight of 20,000, this range is about ±25% difference in ketone content. All mi…
This paper presents practical knowledge about dissolving and spinning cellulose in the NMMO-H 2 O system described in the Kodak and Akzona patents. From the highly hydrated NMMO commercialized by Texaco and a viscose pulp with an average polymerization degree of 700, we made true solutions in two stages: swelling of t…
Crystals of poly-bis(pyrazine)bis(methanesulfonato-O)copper(II) are orthorhombic, a = 8.199(1), b = 13.130(1), c = 6.913(1) Å, Z = 2, space group Pnnm. The structure was solved by conventional heavy atom methods and was refined by full-matrix least-squares procedures to R = 0.025 and R w = 0.033 for 1226 reflections w…
Abstract The electrical properties of a number of filled plastics were examined after subjecting the materials to exposure to isopropyl alcohol, a 25°C detergent/water solution, an 80°C detergent/water solution, and at various chemical plant sites. Compositions which contained metal fillers maintained their conductivi…
Numerical and analytic studies of the effect of long-range (i.e., algebraic) potentials on wetting transitions near bulk critical temperatures are presented within mean-field theory on an Ising lattice gas. The ordinary, special, and extraordinary points of the short-ranged-potential theory of Nakanishi and Fisher rem…
Corona discharges can be useful tools in the semiconductor industry. This paper describes published and previously unpublished applications of corona discharges in device manufacturing, in quality control of insulators, in failure analysis, and in understanding electrical properties of insulators. These uses include d…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA new structural form of tin in an oxygen-capped clusterRoberta O. Day, Joan M. Holmes, V. Chandrasekhar, and Robert R. HolmesCite this: J. Am. Chem. Soc. 1987, 109, 3, 940–941Publication Date (Print):February 1, 1987Publication History Published online1 May 2002Published in…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSpin equilibrium in iron(II) poly(1-pyrazolyl)borate complexes: low-temperature and high-pressure Moessbauer spectral studiesGary J. Long and Bennett B. HutchinsonCite this: Inorg. Chem. 1987, 26, 4, 608–613Publication Date (Print):February 25, 1987Publication History Publis…
New general results on the self-energy of fast electrons interacting with metal surfaces are presented with emphasis on the energy-loss problem in electron microscopy. Some applications to both spherical and planar targets are considered. Our results are relevant to the understanding of inelastic electron scattering n…