Materials Literature
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Summary Acid corrosion inhibitors provide protection by adsorbing on metal surfaces, thus forming a barrier against acid attack. On entering the formation, the inhibitor strongly adsorbs on clays and other minerals present within the matrix of the rock. In some cases. inhibitors contain acid-insoluble residues that ca…
A recent method for predicting light scattering by random aggregates of particles is experimentally examined. This approximate method is here tested in terms of its ability to predict the effects of aggregation of latex spheres of five different sizes on nine different transmitted and scattered light fluxes. In each c…
Les structures cristallographiques de la L-asparagine monohydratee et de la solution solide (0,85-0,15) L-asparagine-acide L-aspartique monohydrate sont affinees en utilisant des donnees RX a 103 K. Les positions atomiques des groupes CONM 2 (asparagine) et CO 2 H (acide aspartique) ont ete determinees par le processu…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and reactivity of the hydroxymethyl complex of rhodium octaethylporphyrinSeth L. Van Voorhees and Bradford B. WaylandCite this: Organometallics 1985, 4, 10, 1887–1888Publication Date (Print):October 1, 1985Publication History Published online1 May 2002Published ini…
The extent of surface destabilization of weight percent ceramic disks was determined after exposure to molten salt mixtures of sodium sulfate containing up to 15 mole percent sodium metavanadate at 1173 K. The ceramic surface was observed to transform from the cubic/tetragonal to the monoclinic phase, concurrent with…
Abstract The molar masses of linear polyesters formed in the polymerization of stoichiometric mixtures of 1,7‐heptanedicarboxylic acid ( 4 ) with 2,2‐bis[4‐(2,3‐epoxypropoxy)phenyl]propane ( 2 ) (the diglycidyl ether of Bisphenol A), and of 1,2‐cyclohexanedicarboxylic anhydride ( 3 ) with 2,3‐epoxypropyl phenyl ether…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSilane inversion catalyzed by weak nucleophiles: pseudorotation of 10-Si-5 intermediatesWilliam H. Stevenson III and J. C. MartinCite this: J. Am. Chem. Soc. 1985, 107, 22, 6352–6358Publication Date (Print):October 1, 1985Publication History Published online1 May 2002Publish…
Zwei Klassen paramagnetischer Mangankomplexe können ESR‐spektroskopisch unterschieden werden: Radikalkomplexe 1 , in denen Radikalanion‐Liganden L⊙⊕ durch Cp(CO) 2 Mn 1 ‐Fragmente stabilisiert sind, und low‐spin‐Mn II ‐Verbindungen 2 mit stark nucleophilen Liganden L.
Effective-medium theory (EMT) results for the behavior of the elastic properties of random-central-force networks with a fraction p of nearest-neighbor bonds present are extended to finite frequencies. Good agreement with numerical simulations for the density of states at all frequencies is demonstrated. In particular…
Recent investigations into metal powder fabrication by chemical precipitation techniques have shown that a wide variety of powder morphologies can be obtained by making subtle changes in the reaction parameters. Palladium powders produced using these techniques find wide application in the microelectronics industry, p…
Abstract The occurrence of palygorskite in some Tertiary sediments in eastern Saudi Arabia was studied. Mineralogical and chemical analyses were made of samples from two sections several meters thick from the Umm er Radhuma and Dammam Formations of Paleocene and Eocene periods, respectively. Layers of shales were obse…
Lead fluorosilicate glasses containing up to 25 mol% PbF 2 were prepared. The dc electrical conductivity, thermal expansion, and transformation‐range viscosity of these glasses indicate that they are anionic conductors and that fluorine significantly decreases the continuity of the vitreous network.
Abstract The drawing behavior of different molecular weight PVDF grades has been investigated over the temperature range 140–160°C, with particular reference to the production of material with enhanced mechanical and electrical properties. Lower molecular weight grades, which have been subjected to a slow‐cooled rathe…
Irradiations with 4 MeV Ni ions and 200–400 keV He ions were carried out on two alloys, Fe-15Cr-15Ni and Fe-15Cr-35Ni, at 675°C and doses up to 84dpa. Both dual-ion irradiation experiments and sequenced He injection-anneal-Ni irradiations were used. The dual-ion experiment showed that the two alloys exhibited large di…
Abstract Liquid crystalline polymers can be processed to form high strength/modulus materials. In processing these materials, it is apparent that molecular orientation is an important factor in determining the physical strength of the processed materials. In this study a systematic investigation was carried out to det…
The rigorous calculation of electromagnetic properties of periodic meshes using moment methods requires considerable algebraic work and computer resources. In this paper, a number of easy to use approximation techniques for analyzing thin structures with square, rectangular, and circular holes are presented. Formulas…
Article Rietveld refinement of the crystal structure of the new zeolite mineral gobbinsite was published on October 1, 1985 in the journal Zeitschrift für Kristallographie - Crystalline Materials (volume 171, issue 1-4).
Two classes of paramagnetic manganese complexes can be differentiated by ESR spectroscopy: radical complexes 1 , in which radical‐anion ligands L ⊙⊖ are stabilized by Cp(CO) 2 Mn 1 fragments, and low‐spin Mn 11 compounds 2 , with strongly nucleophilic ligands L. equation image
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTUniformity of microdomain size of block polymers as compared with uniformity of their molecular weightsTakeji Hashimoto, Hideaki Tanaka, and Hirokazu HasegawaCite this: Macromolecules 1985, 18, 10, 1864–1868Publication Date (Print):October 1, 1985Publication History Publishe…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTManganese(IV) in discrete O3S3 coordinationSamudranil Pal, Phalguni Ghosh, and Animesh ChakravortyCite this: Inorg. Chem. 1985, 24, 22, 3704–3706Publication Date (Print):October 1, 1985Publication History Published online1 May 2002Published inissue 1 October 1985https://pubs…