Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSyntheses of Thermochromic Ethylenes. A Study of the Relationship between Constitution and ThermochromismAlexander Schönberg and Mahmoud Mohamed SidkyCite this: J. Am. Chem. Soc. 1959, 81, 9, 2259–2262Publication Date (Print):May 1, 1959Publication History Published online1…
Diffusion rates of chromium in the body centred cubic phase of the titanium—chromium system have been measured by an autoradiographic tracer technique using the radioactive isotope 51Cr. Two alloys, Ti + 10% Cr and Ti+18% Cr (by weight), in addition to two grades of Ti metal, ‘iodide’ and ‘commercial’, were used as so…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEquilibrium Polymerization of ε-CaprolactamA. V. Tobolsky and A. EisenbergCite this: J. Am. Chem. Soc. 1959, 81, 10, 2302–2305Publication Date (Print):May 1, 1959Publication History Published online1 May 2002Published inissue 1 May 1959https://pubs.acs.org/doi/10.1021/ja0151…
Abstract Published data on the solubility properties and diffusion coefficients for water in polyethylene are critically examined and related to the permeability coefficients analyzed in a previous paper. The data examined in the present article are even more variable than the permeability data, the measured diffusion…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAddition of Carbon Monoxide to Acetylene Dicobalt Hexacarbonyl. A New Type of ComplexHeinz W. Sternberg, Julius G. Shukys, Charles Delle Donne, Raymond Markby, Robert A. Friedel, and Irving WenderCite this: J. Am. Chem. Soc. 1959, 81, 10, 2339–2342Publication Date (Print):Ma…
The concentration of negative ions in the positive column of an oxygen discharge has been measured by a Langmuir probe technique. It is shown how the negative ions affect the ambipolar diffusion and potential distribution in such a plasma. (W.L.H.)
The dielectric loss in 66 nylon (polyhexamethylene adipamide) has been studied over a range of temperatures (—40 to 100°C) and frequencies (50 cps—70 Mc). The effects of radiation induced crosslinking and hydrogen bonding solutes were studied. The principal dipole orientation absorption is similar to that in amorphous…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSemiconductors and Phosphors.H. E. FarnsworthCite this: J. Am. Chem. Soc. 1959, 81, 9, 2281Publication Date (Print):May 1, 1959Publication History Published online1 May 2002Published inissue 1 May 1959https://pubs.acs.org/doi/10.1021/ja01518a081https://doi.org/10.1021/ja0151…
Two methods for reducing internal corrosion of tankers are described. These methods involve (1) flotation of an oil soluble inhibitor on ballast water to coat the internal surfaces of the tanks, and (2) fogging of inhibitor into empty tanks using an inert dispersant. Both methods were tested in the laboratory as well…
Abstract A study of soil Al extraction by various chemical reagents has been conducted. Using N NH 4 OAc solutions buffered at six different pH levels, it was found that the lower the pH of the solution the more Al was extracted. Neutral normal solutions of BaCl 2 , CaCl 2 , KCl, NH 4 Cl, and a solution of BaCl 2 in t…
A detailed comparison between the magnetostatic theory and experimental observation is given. Both the resonant field and the intensity of the magnetostatic modes are compared. The disagreement between observation of resonant fields and the static theory is about 50 gauss for an yttrium iron garnet sphere 1.3 mm in di…
Abstract A study has been made of the effect of fine structure on the decrystallization process which results from the ball‐milling of cellulose. The rate of decrystallization is sensitive to the type of fine structure and is accelerated by the presence of moisture. The extent of chain degradation was greater in air a…
The characteristics of yield points which may be produced in a 70:30 alpha brass have been observed at several temperatures. The yield point phenomena were produced by various techniques which included ageing under stress, unloading and combinations of the two. The effects arising from ageing under stress are compared…
Some aspects of the diffraction of electrons by single crystals are discussed ush~g low-order approximations to the general theory developed in the first paper of this series (Cowley & Moodie, 1957) and some qualitative arguments concerning general results are presented.
In this paper formulas are developed, on the basis of simple physical conceptions, for the calculation of eddy currents in solid and laminated iron, which, as the experiments presented show, enable the losses caused by eddy currents to be predicted with surprising accuracy. A simple formula for the calculation of the…
Abstract The theory of bulk viscosity as developed for the liquid state was applied to amorphous high polymeric systems. The isothermal volume contraction, the dependence of shear viscosity, and the fictive temperature of quenched high polymeric substances are all related to the bulk viscosity and explained by this th…
The effect of introducing point defects into pure metals by (a) quenching and (b) irradiation has been studied using the small-angle x-ray scatter technique. Scattering was obtained from both quenched copper and aluminum after appropriate ageing treatments, from α-irradiated copper after annealing, and from neutron-ir…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTheory of Permeation through Metal Coated Polymer FilmsW. Prins and J. J. HermansCite this: J. Phys. Chem. 1959, 63, 5, 716–720Publication Date (Print):May 1, 1959Publication History Published online1 May 2002Published inissue 1 May 1959https://pubs.acs.org/doi/10.1021/j1505…
Abstract Qualitative and quantitative studies with model compounds have shown that a variety of reactions may occur at 100–300° in molecules containing isocyanate, urea and urethane groups. All or most of these reactions are subject to catalysis so that they may be induced to proceed at lower temperatures. These react…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAqueous Solutions of Polyvinylsulfonic Acid: Phase Separation and Specific. Interactions with Ions, Viscosity, Conductance and PotentiometryH. Eisenberg and G. Ram MohanCite this: J. Phys. Chem. 1959, 63, 5, 671–680Publication Date (Print):May 1, 1959Publication History Publ…