Materials Literature
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Abstract Polyurethanes and polyureas containing long methylene chain units have been prepared from the following six series of monomer combinations; aliphatic diisocyanates with aliphatic glycols or diamines, methylene bis(4‐phenyl isocyanate) with aliphatic glycols or diamines, and p ‐xylylene diisocyanate with aliph…
The heat capacity of tetragonal GeO2 has been measured from 16 to 320°K by adiabatic calorimetry. The entropy at 298·15°K calculated from the results is 9·49 cal. deg.–1 mole–1.
Abstract not Available.
Some energy aspects of the Pm3m—Fm3m transformation of CsCl have been studied quantitatively. Effects of addition of RbCl, KCl and CsBr to CsCl on the transformation have been examined. Above a critical concentration of RbCl or KCl, the transformation becomes irreversible and at much higher concentrations the Fm3m for…
The effects of prior deformation, grain size, and grain-boundary and twin-boundary energy on the frequency of occurrence of annealing twins has been investigated. Deformed materials generally exhibit peaks in their twin frequency vs. grain size curves while undeformed materials do not. In the absence of prior deformat…
Accurate measurement of the depolarisation ratios showed that maximum depolarisation (6//7) is observed only for the out-of-plane bending vibration. The (band area) depolarisation ratio for the CD in-plane bending band of DCO2–, 0·80, is slightly less, and that of the CH in-plane bending band of HCO2–, 0·64, considera…
The complexes present in freshly-prepared solutions containing cobalt(II) and cyanide ions have been investigated. The main complex is identified as the hexaco-ordinate [Co(CN)5H2O]3– by comparison of its spectrum with those of the analogous isocyanide complexes. No evidence was found for the hexacyanide [Co(CN)6]4– u…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSelf-diffusion in simple fluidsJohn A. Palyvos and Howard Ted DavisCite this: J. Phys. Chem. 1967, 71, 2, 439–444Publication Date (Print):January 1, 1967Publication History Published online1 May 2002Published inissue 1 January 1967https://pubs.acs.org/doi/10.1021/j100861a037…
Get PDF Email Share Share with Facebook Tweet This Post on reddit Share with LinkedIn Add to CiteULike Add to Mendeley Add to BibSonomy Get Citation Copy Citation Text D. A. Holmes, "On the Calculation of Thin Film Refractive Index and Thickness by Ellipsometry," Appl. Opt. 6, 168-169 (1967) Export Citation BibTex End…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTKinetics of calcium oxalate pyrolysisF. E. Freeberg, Kenneth Owen Hartman, Isamu C. Hisatsune, and John M. SchempfCite this: J. Phys. Chem. 1967, 71, 2, 397–402Publication Date (Print):January 1, 1967Publication History Published online1 May 2002Published inissue 1 January 1…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTKinetics of oxalate ion pyrolysis in a potassium bromide matrixKenneth Owen Hartman and Isamu C. HisatsuneCite this: J. Phys. Chem. 1967, 71, 2, 392–396Publication Date (Print):January 1, 1967Publication History Published online1 May 2002Published inissue 1 January 1967https…
Density (and some viscosity) data are presented for binary sodium borate melts containing as much as 60 mole % Na 2 O and for ternary sodium silicoborate melts with B/Si <2.0 between 1000°C and 1300°C. The high‐temperature partial molar volume analysis of the binary sodium borate melts reveals about 50% BO 4 tetrah…
Abstract Two high purity Al foils of thickness 40 μm and 5.6 μm are simultaneously irradiated. The initial resistivity increments per unit defect concentration for the foils differ by a factor of two due to the size effect. Sondheimer's theory is in good agreement with the experimental data. The calculations are prese…
Author: Zwick, Peter; Genre: Journal Article; Published in Print: 1967; Title: Beschreibung der aquatischen Larve von Neurorthus fallax (Rambur) und Errichtung der neuen Planipennierfamilie Neurorthidae fam. nov.
Abstract Deformation processes in polymers are reviewed within the framework of rubber elasticity theory. The effect of hindered rotation on imposed and spontaneous length changes of polymeric fibers is discussed, leading to a new definition of crystallinity as a localized region of hindered rotation. This concept, to…
A hard-sphere model analogue of undirectional crystal growth has been devised and used to measure quantitatively the rates of growth normal to (111) and (100) planes in a face-centred cubic crystal structure. It has been found that 〈111〉 growth is much faster than 〈100〉 growth, and the result is interpreted in terms o…
Methods have been developed for growing thin polycrystalline films, and oriented polycrystalline films. Experiments with the thin films allow measurement of the absorption spectra of the N-salicylideneanilines well into the ultraviolet, and thus permit comparison of the effects of temperature change on the “thermochro…
Abstract Calculations of characteristic energy losses of electrons in thin dielectric foils are given for a) electrons with inclined incidence to the foil, b) electrons travelling parallel to the foil surface. Retardation is taken into account for case b) in the limit of very thick foils. For the special case in which…
The kinetics of the formation of zinc ferrite from zinc oxide and iron(III) oxide powders have been studied. Below about 1000°C Jander's equation is obeyed. Vaporization of the more mobile reactant (ZnO) occurs to form a coating on the particles of the other reactant with subsequent diffusion into it. An activation fr…
The isolation of complexes of stoicheiometry [Fe2B4O]X2Y2·xH2O (where B = 1,10-phenanthroline, X = Y = Cl, ClO4, NO3, or ½SO4, or X = Cl, Y = ClO4, or B = bipyridyl, X = Cl, Y = ClO4) is reported. For the chloride complex co-ordination of chlorine to iron appears to occur. The magnetic properties of the complexes over…