Materials Literature
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Adsorption isotherms of hydrogen and deuterium have been measured at temperatures of 75–90 °K and pressures up to 760 mm Hg on the following six adsorbents: charcoal (2), silica gel, and Linde molecular sieves type 4A, 5A, and 13X.Deuterium was found to be adsorbed to a greater extent than hydrogen in all cases invest…
Abstract Two samples of highly isotactic polypropylene prepared by a NATTA's catalysis, have been fractionated by a column fractionation technique. Fractions having M̄ w /M̄ n ratio very small (1.14 – 1.27) have been obtained and used for the determination of [η]−M̄ n and [η]−M̄ w relations. Because of the small value…
M. A. V. Devanathan and M. Selvaratnam, Trans. Faraday Soc., 1960, 56, 1820 DOI: 10.1039/TF9605601820
The force exerted on an iron part in a magnetic field may be calculated by a number of different methods, all of which give equivalent force distributions confined principally to a surface. Seven different methods, giving rise to five different surface force intensities, are shown to result in the same total force. Ad…
Abstract The equilibrium conditions pertaining to reversible melt‐polycondensation in the polyethylene terephthalate system have been investigated at different temperatures and average DP's. Free ethylene glycol, end‐groups and monomer were determined quantitatively. The equilibrium constant K depends slightly on temp…
Abstract Die dynamisch‐mechanischen Eigenschaften eines Polyamids aus Hexamethylendiamin und Dekamethylendicarbonsäure wurden mittels freier Torsionsschwingungen bei Frequenzen zwischen 0.1 und 3 Hz in einem Temperaturbereich zwischen –180 und +60°C untersucht. Unter Konstanthaltung der mechanischen und thermischen Vo…
Les fortes variations d'intensité de la résonance magnétique nucléaire dans les alliages dilués sont dues à la variation de densité électronique Δρ créée à grande distance par les impuretés dissoutes. Aux noyaux distants de r d'une impureté, Δρ à la forme : Cte × cos ([FORMULE]) et donne lieu à un gradient de champ ay…
The cellulose-tendering properties of anthraquinone-2,7-disulfonic acid disodium salt have been successfully applied to graft various vinyl monomers onto cellulosic materials. A cellophane (or cellulose derivative) film is suspended in a solution containing monomer, solvent, dye, and water and irradiated with a 100-w.…
Abstract Bei Modellversuchen mit 3β‐Acetoxy‐Δ 5 ‐cholensäure‐methylester, 3β‐Acetoxy‐Δ 5 ‐ätiocholensäure‐methylester und O‐Acetyl‐oleanolsäure‐methylester wurde gefunden, dass die von Taschner & Liberek, l.c. beschriebene Methode der Halolyse von Carbonsäureestern mit Lithiumjodid sich für die selektive Spaltung…
Physiological factors affecting the flow and composition of bile may be divided into two gen- eral categories. First, the availability of bile salts (by hepatic synthesis and by reabsorption from the bowel) has a significant influence on the rate of bile production. The choleretic effect of natural bile salts and the…
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Instruments for making precision measurements of the specular reflectance at essentially normal incidence in the near ultraviolet, visible, and infrared regions of the spectrum are described. The square of the absolute reflectance is measured, with a resultant increase in measuring precision, and the major sources of…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSurface Properties of the Quinoline-Insoluble Fraction of Coal-Tar Pitch.M. S. Morgan, W. H. Schlag, and M. H. WiltCite this: J. Chem. Eng. Data 1960, 5, 1, 81–84Publication Date (Print):January 1, 1960Publication History Published online1 May 2002Published inissue 1 January…
R. Grzeskowiak, G. H. Jeffery and A. I. Vogel, J. Chem. Soc., 1960, 4728 DOI: 10.1039/JR9600004728
S. Djordjevic and G. J. Hills, Trans. Faraday Soc., 1960, 56, 269 DOI: 10.1039/TF9605600269
R. N. Haszeldine and J. C. Young, J. Chem. Soc., 1960, 4503 DOI: 10.1039/JR9600004503
The first page of this article is displayed as the abstract.
Kokoku Rayon and Pulp Co. Ltd., Research Division, 11 Shiba Tamura-cho, Minato-ku, Tokyo, Japan.In a previous paper (J. Soc. Textile and Cellulose Ind., 14, 594 (1958)) the influence of other factors than the degree of polymerization as shown by Alf af Ekenstam (Svensk Papperstidn., 45, 81 (1942)) on the solubility of…
A spherical Luneberg lens has the property of focusing the rays from a point source on the surface of the lens into a collimated beam on the diametrically opposite side of the lens. In microwave applications a point source on the surface of the lens is usually not obtained. Curves are given for the required index of r…
The maximum bubble pressure method for the determination of surface tension has been modified for use with thermally unstable, viscous, opaque polymers at high temperatures. A value of 35.1 dynes/cm. was obtained for nylon 66 at 285°C. The order of this value and those for other polymers has been compared with the val…