Materials Literature
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Current versions of two methods commonly used for the determination of tearing strength require clarification regarding treatment of the data obtained and revision to accommodate newer types of inertialess testing machines. Experimental information, providing the necessary background data, has been obtained. Sixteen f…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTChanges in Physical Properties of Graphitized Carbon Rods upon Gasification with Carbon DioxideP. L. Walker Jr. and Emile RaatsCite this: J. Phys. Chem. 1956, 60, 3, 364–369Publication Date (Print):March 1, 1956Publication History Published online1 May 2002Published inissue…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation W. Spindel, T. I. Taylor; Preparation of 99.8% Nitrogen‐15 by Chemical Exchange. J. Chem. Phys. 1…
The purpose of this research was to evaluate the use of single-fiber testing methods for the determination of cotton fiber properties and for the prediction of yarn quality. Samples of unprocessed cotton, finisher drawing sliver, and 36's carded yarn were ob tained for 21 domestic cotton varieties representing extreme…
Abstract The kinetics of the copolymerisation of methylmethacrylate and maleic anhydride have been examined at 60°C. The reactivity ratios have been determined by analytical and radioactive techniques and are r 1 = 3.5 and r 2 = 0.03. Radioactive azoisobutyronitrile has been used as initiator; the rate and efficiency…
Oxide films on stainless steels have been classified into three types according to film thickness, film structure, film composition, and influence of the film on resistance to corrosion. Compositional properties of oxide films isolated from surfaces of stainless steels were studied using specially developed microanaly…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhysical Properties of Eight High-Purity NitroparaffinsEmory E. Toops Jr.Cite this: J. Phys. Chem. 1956, 60, 3, 304–306Publication Date (Print):March 1, 1956Publication History Published online1 May 2002Published inissue 1 March 1956https://pubs.acs.org/doi/10.1021/j150537a0…
The electrical resistivity and Hall coefficient of a semiconducting diamond (Type IIb) have been measured between - 100°C and 600°C using standard d.c. methods. The diamond behaves like a normal p-type semiconductor. At 20°C its resistivity is 270 ohm cm and the Hall mobility of the holes is 1550±150 cm 2 volt -1 sec…
Abstract Although vacuum crystallizers are used widely, crystal‐size–control methods have not been adequately analyzed. This paper supplies in part the deficiency of technical information on this problem. Industrial crystallizers may have inherent nucleation rates in excess of or below the seed‐crystal requirement for…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCausticization of Carbonate SolutionsF. E. Littman and H. J. GaspariCite this: Ind. Eng. Chem. 1956, 48, 3, 408–410Publication Date (Print):March 1, 1956Publication History Published online1 May 2002Published inissue 1 March 1956https://pubs.acs.org/doi/10.1021/ie51398a020ht…
In order to evaluate the possible role of radioactive particles from an atomic cloud as condensation nuclei, an analysis has been made to determine their degree of ionization. Individual radioactive particles become ionized due to β emission, and an estimate of the half-life of these ions has been made for various tim…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTInfrared Absorption Spectra of Inorganic Coördination Complexes. VIII. Normal Vibrations of Tetracyanoplatinate(II) Ion1D. M. Sweeny, Ichiro Nakagawa, San-Ichiro Mizushima, and J. V. QuaglianoCite this: J. Am. Chem. Soc. 1956, 78, 5, 889–892Publication Date (Print):March 1,…
Abstract 1. Cyanoethylation of trichlorosilane was found to be catalysed by organic bases, benzoylperoxide, or platinized asbestos at about 160°C. The catalytic activities of organic bases increased in the order, dimethylaniline << quinoline < pyridine, piperidine < triethyl-amine. Pyridine…
Abstract Nach einer kurzen Schilderung der experimentallen Befunde, die zur Existenz von Wasserstoffbindungen zwischen Polyamidmolekülen und zu Einzelheiten der Kristall Struktur dieser Substanzen, führen, werden Ergebnisse über den Zusammenhang zwischen Festigkeit und Kristallinitätsgrad mitgeteilt. Ferenhin wird anh…
A new experimental technique is described for measuring scintillation decay times in the millimicrosecond region. The method developed uses the fact that a pulsed current, as delivered by the photomultiplier scintillation counter produces a far greater power dissipation in a resistive load than does the same mean stea…
Abstract The chemical engineer frequently has to correlate kinetic data for heterogeneous reactions simply and accurately in order to make useful predictions of reaction rates over a range of conditions. The Langmuir‐Hinshelwood approach, which is frequently used for this purpose, does not have the theoretical validit…
Abstract Attempts have been made, particularly by American workers, to exploit differences in crystalline and amorphous polymer spectra to determine crystalline/amorphous ratios. In most published work authors have been forced to rely on calibration by other methods, especially density. They have justified the use of…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMicroscopic Examination of Modified StarchesT. J. Schoch and E. C. MaywaldCite this: Anal. Chem. 1956, 28, 3, 382–387Publication Date (Print):March 1, 1956Publication History Published online1 May 2002Published inissue 1 March 1956https://doi.org/10.1021/ac60111a027RIGHTS &…
Abstract Eine qualitative Überlegung zeigt, daß sich bei genügend klein gewählter Konzentration einer Polymerlösung die bei konzentrierteren Lösungen nach Zusatz eines Vernetzungsreagenses zu beobachtende Gelbildung unterdrücken läßt. In diesem Falle fällt eine durch das Vernetzungsreagens bewirkte Verknüpfung von in…
The elastic constants of thirteen glasses were measured by a dynamic method at elevated temperatures. Both Young's modulus and the shear modulus were determined and from these Pois‐son's ratio was calculated as a function of temperature. Fused silica, Vycor‐brand glass, and Pyrex‐brand glass had positive temperature c…