Materials Literature
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Abstract Thin crystals of copper and platinum phthalocyanine have been studied in the transmission electron microscope. The (20T) planes of the crystal lattice have been resolved and the distance between them (12.0 + 0.2 A) is in close agreement with the X-ray value of 11.94 A. Imperfections in the lattice have been d…
Abstract In dealing with this problem, the cause of stress must be considered, and whether the stress remains constant, decreases, or increases as yield or creep occurs as a result of high stress. A qualitative analysis of the stress due to a maintained temperature differential in a flat bar is given for both free and…
Fluorine and iodine compounds, both organic and inorganic, were tested as flame retardants for cotton. Comparison with bromine and chlorine compounds showed that the effectiveness of the halogens, on an equal weight basis, increases in the order. fluorine, chlorine, bromine, iodine, with the last two about equally eff…
Abstract Es wird die Beobachtung einer Umwandlung α‐Al 2 O 3 in β‐Al 2 O 3 beschrieben. Maßgebend hierfür ist der durch eine Flußsäurebehandlung auftretende Chiolith, 3AlF 3 · 5NaF, welcher beim Erhitzen zusammen mit dem Korund unter Bildung von β‐Al 2 O 3 reagiert. Die Untersuchungen sind außer an Pulvern auch an Ein…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThermal Degradation of Unvulcanized and Vulcanized Rubber in VacuumSidney Straus and S. L. MadorskyCite this: Ind. Eng. Chem. 1956, 48, 7, 1212–1219Publication Date (Print):July 1, 1956Publication History Published online1 May 2002Published inissue 1 July 1956https://pubs.ac…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSwelling of Silicone ElastomersR. L. Hauser, Charles Walker, and F. L. KilbourneCite this: Ind. Eng. Chem. 1956, 48, 7, 1202–1208Publication Date (Print):July 1, 1956Publication History Published online1 May 2002Published inissue 1 July 1956https://pubs.acs.org/doi/10.1021/i…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPolymerization and Depolymerization Phenomena in Phosphate–Metaphosphate Systems at Higher Temperatures. IV. Condensation Reactions of Alkali Metal Hydrogen PhosphatesR. K. Osterheld and M. M. MarkowitzCite this: J. Phys. Chem. 1956, 60, 7, 863–867Publication Date (Print):Ju…
Abstract Fibers containing both polyacrylonitrile and silk have been spun using an aqueous solution of ZnCl 2 (56% ZnCl 2 by weight) as solvent. The relative polymer proportions ranged from 100% polyacrylonitrile to 20% polyacrylonitrile. The conditions under which the fibers were spun are discussed, as are the result…
Forty-three cottons, varying extensively in fiber properties, were used to show the relationship between cotton fiber properties, particularly fiber bundle break elongation, and the properties of a coarse and medium yarn. In addition, there are presented some practical aspects of a speculative nature based on the resu…
The influence of the time-dependent quadrupole interaction in various liquid sources of ${\mathrm{In}}^{111}$ on the directional correlation of the ${\mathrm{Cd}}^{111}$ gamma rays has been investigated quantitatively. By using the technique of delayed correlation measurements the characteristic interaction (relaxatio…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHeat of Formation of Solid and Liquid Binary Alloys of Copper with Cadmium, Indium, Tin and Antimony at 450°O. J. KleppaCite this: J. Phys. Chem. 1956, 60, 7, 852–858Publication Date (Print):July 1, 1956Publication History Published online1 May 2002Published inissue 1 July 1…
The rates of decomposition of N2O and of formation of NO were measured simultaneously in a static system. NO yields at the beginning of reaction are as high as 50 to 60%, but NO quickly inhibits its own further formation. From initial NO yields, information about the reaction of oxygen atoms with N2O and about wall re…
The structure of sodium dithionite has been determined by X-ray analysis. The crystals are monoclinic, a----6"404:k0.0045, b----6-559~:0.0028, c----6"586:k0-0056 /~, fl---119 31':k0 02 ', space group P2/c, with two molecules of Na2S204 in the unit cell. The structure was refined by successive difference Fourier projec…
Acrylamide, methacrylamide, methylene-bis-acrylamide, vinyl carbazole, vinyl stearate, acrylic acid, methacrylic acid and potassium, calcium and barium acrylates have been polymerized in the solid state by irradiation with γ-rays. Further, the molecular weight of polyacrylamide obtained at low conversion was constant…
The behavior of transient nuclear induction signals from solids is described by a stochastic model based on a Markoff process. The model assumes the presence of local dipolar field fluctuations in a crystal due to a set $B$ of coupled nuclei. These fluctuations can destroy or enhance the observed precessional coherenc…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHeats of Formation of Niobium Nitride, Tantalum Nitride and Zirconium Nitride from Combustion CalorimetryAlla D. Mah and Norma L. GellertCite this: J. Am. Chem. Soc. 1956, 78, 14, 3261–3263Publication Date (Print):July 1, 1956Publication History Published online1 May 2002Pub…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHeat of Formation of Solid and Liquid Alloys in the Systems Silver–Cadmium, Silver–Indium and Silver–Antimony at 450°O. J. KleppaCite this: J. Phys. Chem. 1956, 60, 7, 846–852Publication Date (Print):July 1, 1956Publication History Published online1 May 2002Published inissue…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEffect of pH on Polymerization of Silicic AcidKatsumi GotoCite this: J. Phys. Chem. 1956, 60, 7, 1007–1008Publication Date (Print):July 1, 1956Publication History Published online1 May 2002Published inissue 1 July 1956https://pubs.acs.org/doi/10.1021/j150541a046https://doi.o…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA Study of the LixMn(1-x)O System1W. D. Johnston and R. R. HeikesCite this: J. Am. Chem. Soc. 1956, 78, 14, 3255–3260Publication Date (Print):July 1, 1956Publication History Published online1 May 2002Published inissue 1 July 1956https://pubs.acs.org/doi/10.1021/ja01595a006ht…
Using Green's function methods, we express the field of a grating of cylinders excited by a plane wave as certain sets of plane waves: a transmitted set, a reflected set, and essentially the sum of the two "inside" the grating. The transmitted set is given by\psi_{o} + 2\SigmaC_{\upsilon}G(\theta_{\upsilon}, \theta_{o…