Materials Literature
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Abstract The preparation of a homologous series of eighteen poly(vinyl alkyl ethers) by cationic solution polymerization is reported. Physical and mechanical properties of the polymer were found to be highly dependent on the size or bulkiness of the alkyl side chain. Thus, poly(vinyl alkyl ethers) having highly branch…
Thin oxide whiskers have been found to grow on copper by a number of investigators. The relation of these growths to the mechanism of oxidation and to changes in the kinetics of oxidation remains to be established. To answer these questions a study was made of the oxidation of copper using the vacuum microbalance meth…
Al2CO has a long-range disordered structure based on the wurtzite lattice and a short-range √3a, 2c superstructure. The long-range atomic parameters were determined from the single crystal sharp diffraction data with Mo K radiation. The diffuse spectra, although very apparent on the single-crystal x-ray photographs, w…
R. Heiligman-Rim, Y. Hirshberg and E. Fischer, J. Chem. Soc., 1961, 156 DOI: 10.1039/JR9610000156
Abstract Aus 21 heterocyclischen Dicarbonsäuren wurden lineare Polyamide hergestellt. Kondensationen durch Schmelzen von Hexamethylendiammoniumsalzen waren ungünstig, da die Produkte decarboxylierten, während Kondensationen über Ester etwas bessere Resultate gaben. Einige Salze ließen sich überhaupt nicht kondensieren…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDifferential Thermal Analysis and Thermogravimetric Analysis of Fission Product Oxides and Nitrates to 1500° C.P. F. Campbell, M. H. Ortner, and C. J. AndersonCite this: Anal. Chem. 1961, 33, 1, 58–61Publication Date (Print):January 1, 1961Publication History Published onlin…
C. D. Clark, P. J. Kemmey and E. W. J. Mitchell, Discuss. Faraday Soc., 1961, 31, 96 DOI: 10.1039/DF9613100096
Abstract A survey is given of the existing methods for measuring the surface tension from the geometry of sessile drops. These methods, which generally consist of the measurement of simple drop dimensions, are insufficiently accurate for use with adsorption studies. A new procedure is described to find the surface ten…
Oxide films formed at room temperature on iron single crystals and poly‐crystals have been investigated by electron diffraction and electrochemical methods. The structure of the oxide is found to vary from an Fe 3 O 4 type material at the metal/oxide interface to a γ ‐ Fe 2 O 3 type material at the oxide/gas interface…
D. M. Adams, J. Chatt, R. G. Guy and N. Sheppard, J. Chem. Soc., 1961, 738 DOI: 10.1039/JR9610000738
Strontium orthophosphate undergoes a rapid, reversible transition at 1305°C. The high‐temperature β form of pure Sr 3 ( PO 4 ) 2 cannot be quenched to room temperature, even with extremely rapid cooling. Determination of phase relationships on the orthophosphate joins between Sr 3 ( PO 4 ) 2 and each of the three orth…
Alloying chromium with small amounts of platinum, palladium, iridium, rhodium, ruthenium, or osmium markedly improves its corrosion resistance to nonoxidizing acids such as sulfuric or hydrochloric acid. The presence of rhodium, palladium, or osmium has little influence on the resistance of chromium to an oxidizing ac…
L'effet global des processus d'absorption et d'émission de photons de résonance optique sur l'état fondamental d'un ensemble d'atomes est étudié à partir d'équations d'évolution établies précédemment. On met ces équations sous une forme plus simple grâce à une « approximation séculaire», toujours valable dans les cas…
The behaviour of metal‐free phthalocyanine‐tetrasulfonate and some metal derivatives in aqueous solution has been investigated. It was found that most of these compounds dimerize in diluted aqueous solution. The stabilities of these dimers have been determined by spectrophotometric measurements.
M. Whalley, J. Chem. Soc., 1961, 866 DOI: 10.1039/JR9610000866
Une étude par diffraction de neutrons a montré que la structure de MnAu 2, quadratique centrée, peut être considérée comme un empilement, normalement à l'axe c, de feuillets de manganèse séparés par deux feuillets d'or. MnAu2 est d'autre part un hélimagnétique : tous les atomes de manganèse d'un même feuillet ont leur…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSn1 Nuclear Magnetic Resonance Spectra1John J. Burke and Paul C. LauterburCite this: J. Am. Chem. Soc. 1961, 83, 2, 326–331Publication Date (Print):January 1, 1961Publication History Published online1 May 2002Published inissue 1 January 1961https://pubs.acs.org/doi/10.1021/j…
The kinetics of the dissolution of iron in sulfuric acid was investigated by polarizaton measurements in the presence of iodide ions or carbon monoxide as an inhibitor. The measurements included an oscillographic study of transient phenomena as well as steady states. The adsorption of iodide ions on iron was measured…
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Several species of blue-green algae were studied in thin sections with the electron microscope. Our electron micrographs confirm the view that the cell of blue-green algae is different and simpler in organization than the typical plant or animal cell. On the other hand, the general pattern of ultrastructure is the sam…