Materials Literature
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Abstract The polycondensation reaction of hexamethylenediammonium adipate (nylon 66 salt) has been studied in the presence of water in 0.5–10.0 molar ratio. The reaction proceeds extremely fast and reaches equilibrium after about 5 hours at 200‐220°C. The apparent equilibrium constant between chain molecules increases…
The first page of this article is displayed as the abstract.
Two properties of nonstoichiometric zirconium dioxide powder have been studied. Pressures of oxygen in equilibrium with , with 0.03 > x > 0, have been determined at temperatures of 900°, 1000°, and 1100°C by passing hydrogen‐water vapor mixtures over the oxide. The measured pressures are in the range 10 −20 to 10 −12…
J. A. Elvidge and A. B. P. Lever, J. Chem. Soc., 1961, 1257 DOI: 10.1039/JR9610001257
Abstract not Available.
With solutions containing Cl − ions Pt anodes dissolve as , this corrosion being quantitative for low current densities. It is known that attack by d.c. is enhanced by increasing temperature, high Cl − concentration, and high acidity. Some inhibitors, especially sulfur‐containing compounds, almost inhibit anodic corro…
The tensile deformation of chemically polished magnesium oxide crystals has been correlated with the distribution of slip at the onset of plastic flow. If two slip bands, generated on orthogonal {110} planes, happen to intersect to nucleate a crack before other slip bands develop nearby, then the crack so formed is un…
Zur Ergänzung bekannter Verfahren zur Bestimmung thermodynamischer Kenngrössen von Legierungen 1 wurden folgende Möglichkeiten experimenteil geprüft:( 1) Direktkalorimetrische Vereinigung der Komponenten (a) mit Fe-S-Gemisch (50 At. prozent) als Zündmaterial (b) durch Zündung mit einem in das Kalorimeter fallenden Hei…
Tafel‐type cathodic polarization curves were obtained for aluminum alloys corroding in anaerobic acid and food media. The overvoltage‐intercept method was found to give corrosion currents equivalent to the measured rates of hydrogen evolution. Tafel‐type anodic polarization curves could not be obtained. Anodic polariz…
Theories of the mechanism of film growth and breakdown on zirconium and zircaloy‐2 are discussed in the light of recent evidence obtained at A.E.R.E. and a further explanation of the observed phenomena is offered. Additional experiments which are necessary to obtain confirmatory information are considered.
Abstract Aus Plumeria rubra var. alba (Apocynaceae) wurden neben dem bereits bekannten Fulvoplumierin das schon früher aus PI. multiflora isolierte Plumericin, sowie neu Isoplumericin, β‐Dihydroplumericin und β‐Dihydroplumericinsäure isoliert. Die vier Stoffe wurden charakterisiert und ihre Konstitution und Stereochem…
Abstract Exchange isotherms determined for the K‐A1 ion pair with montmorillonite, kaolinite and two soils were S‐shaped. In dilute solutions (<0.05 N ), A1 was strongly preferred by exchange sites except at low levels of K‐saturation. In more concentrated solutions (0.1 to 0.25 N ), K was preferred when its satura…
The cathodic behavior of iron, , and have been investigated in the borate/ buffer solution of . The hydrogen overpotential on iron is found to vary on surfaces of different crystallographic orientation and with changes in the surface microstructure. The immersion potentials and cathodic reduction behavior with regard…
Abstract CsCl und CoCl 2 bilden ein vierfach eutektisches System mit den Verbindungen Cs 3 CoCl 5 , Cs 2 CoCl 4 und CsCoCl 3 . Zwei weitere Verbindungen — Cs 5 Co 2 Cl 9 und Cs 3 Co 2 Cl 7 — zersetzen sich im festen Zustand. Im System RbCl/CoCl 2 liegen vor: Drei Eutektika, die Verbindungen Rb 2 CoCl 4 und RbCoCl 3 ,…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTProgress in Semiconductors.Morton E. JonesCite this: J. Am. Chem. Soc. 1961, 83, 2, 507–508Publication Date (Print):January 1, 1961Publication History Published online1 May 2002Published inissue 1 January 1961https://doi.org/10.1021/ja01463a076RIGHTS & PERMISSIONSArticle Vie…
Abstract not Available.
G. E. Walrafen and D. M. Dodd, Trans. Faraday Soc., 1961, 57, 1286 DOI: 10.1039/TF9615701286
J. H. Golden, J. Chem. Soc., 1961, 3741 DOI: 10.1039/JR9610003741
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEFFECTS OF DEHYDRATION AND CHEMISORBED MATERIALS ON THE SURFACE PROPERTIES OF AMORPHOUS SILICAW. K. Lowen and E. C. BrogeCite this: J. Phys. Chem. 1961, 65, 1, 16–19Publication Date (Print):January 1, 1961Publication History Published online1 May 2002Published inissue 1 Janu…
The nomenclature of the chloritoid group, which includes ottrelite, is reviewed. Five new chemical analyses, and all published analyses that are considered reliable, indicate that the chloritoid group can be represented by the general formula H 2 FeAI 2 SiO 7 with up to two-fifths of the ferrous iron replaced by magne…