Materials Literature
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Bifurcation buckling of oval cylindrical shells under the interaction of uniform compressive forces and bending moments of arbitrary orientation is investigated. Buckling loads as well as the asymmetric buckling modes are determined by a matrix interative solution aided by a sequence of successive approximate solution…
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Optically anisotropic glasses were obtained by the uniaxial stretching of phase‐separated borosilicate glasses in the transformation temperature range. The sign inversion of the birefringence, induced by subsequent heat treatments, was correlated with microstructure. The positive birefringence is attributed to form bi…
Abstract We have developed an empirical correlation between the loss tangent (tan δ) and the product of the volume fraction (ϕ) of carbon black in the composite and the total filler-polymer interfacial area per unit volume of composite (ψ). This correlation was applied to vulcanizates based on SBR-1500, SBR-1712, and…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAnisotropic exchange and temperature-dependent electron paramagnetic resonance line width in one-dimensional copper(II) complexes. 2. Magnetic properties of copper(II) oxalate-1/3-waterKenneth T. McGregor and Zoltan G. SoosCite this: Inorg. Chem. 1976, 15, 9, 2159–2165Public…
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Abstract The iron chelating ability of hydroxamic acid polymers was studied as a function of the atomic chain spacing separating neighboring hydroxamic acid units. Two polymers were prepared, one having the hydroxamic acid group separated by 11 atoms and the other by three atoms. The iron binding of these polymers was…
In order to explain experimental observations on amorphous arsenic chalcogenides, it has recently been proposed that these compounds contain a high density of dangling bonds with rather special properties. However, chemical considerations raise doubts as to the plausibility of this model, which also does not readily a…
The kinetics of the final stages of crack healing and strength recovery are formulated from a simple mechanistic point of view. Experimental verification is obtained from literature data and from healing data on notched UO 2 bars with small cracks introduced by local thermal shock at the notch. The analysis indicates…
A conceptual means of obtaining improved bonding between filler particles and the polymeric binders of composites is presented. It involves preparing glass particles that separate into two interconnected vitreous phases when heated to an appropriate temperature, and then etching these to produce a porous surface layer…
Abstract Measurements of the permeation rate of electrolytic hydrogen through steel membranes have shown that compounds of P, As, Sb, S, Se, and Te enhance the entry of hydrogen into the steel only under conditions resulting in the formation of hydrides of hydrides of these elements. It may be presumed that the hydrid…
Auger electron images and analysis have been obtained with a spatial resolution of 30 nm, using an ultra-high vacuum field emission scanning electron microscope fitted with a cylindrical mirror analyser. This represents a large improvement over currently available instruments, and has important implications for micros…
Abstract A set of poly(vinyl chloride) samples were investigated with respect to their thermal stability. The dehydrochlorination rates were measured in nitrogen at 190°C by use of a very accurate, conductometric method. For all polymers studied, a significant molecular weight increase was observed after 0.4% conversi…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectronic structure of transition metal thiocarbonyl complexesDennis L. Lichtenberger and Richard F. FenskeCite this: Inorg. Chem. 1976, 15, 9, 2015–2022Publication Date (Print):September 1, 1976Publication History Published online1 May 2002Published inissue 1 September 197…
A method is described for the preparation of high purity myosin from the left ventricle of pig heart. The purified myosin was free from nucleic acid, actin, tropomyosin, troponin, the 150,000 molecular weight protein and other contaminants. Analyses of subunits in the purified myosin were carried out on 3.5% acrylamid…
The design principles, construction, and operation of an instrument designed for the rapid measurement of the distribution of fiber fineness of wool are described. The instrument is based on an electro-optical measurement of the amount of light scattered from a directed beam by fiber snippets. The snippets are transpo…
Abstract The syntheses of alkylcobalt(III)octaethylporphyrins(OEP) via nucleophilic attack of the Co(I) complex to unsaturated compounds are reported. Olefins with an electron-withdrawing group and acetylenes react with Co(I)(OEP), whereas olefins with an electron-donating group such as propylene and cyclohexene are u…
Magnetic properties of Fe1−xSix sputtered films were investigated in the range 0⩽x⩽0.43. The films were found to be amorphous for the compositions x⩾0.20. The magnetic moment change upon crystallization depends on x. The magnetostriction seems to be a predominant factor in determing the hysteresis loops. The films in…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA theoretical analysis of the factors determining the conformations and stabilities of oxy- and thiocarbanionsNicolaos D. Epiotis, Ronald L. Yates, Fernando Bernardi, and Saul WolfeCite this: J. Am. Chem. Soc. 1976, 98, 18, 5435–5439Publication Date (Print):September 1, 1976…
High-efficiency blazed grating couplers have been successfully realized by using an ion etching technique. We observed that a guided wave was radiated as the leaky wave which appears selectively either above or below the grating depending on the direction of the propagation of the guided wave. The coupling efficiency…