Materials Literature
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A study was made of the growth and characterization of ruthenium dioxide single crystals. The optimum conditions for the growth of sound crystals by the transport and oxidation of ruthenium metal are given. The relationship of the growth conditions to crystal habit, stoichiometry, lattice constant, and resistivity is…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAn XPS study of the relative .pi.-acceptor abilities of the nitrosyl and carbonyl ligandsH. W. Chen and William L. JollyCite this: Inorg. Chem. 1979, 18, 9, 2548–2551Publication Date (Print):September 1, 1979Publication History Published online1 May 2002Published inissue 1 S…
Abstract Eight samples of high‐density polyethylene with weight‐average molecular weights ranging from 5.5 × 10 4 to 17.3 × 10 4 have been studied. In addition to GPC molecular weight characterization, the recoverable compliance, the shear viscosity, and the extrudate swell were determined at temperatures between 138…
Abstract Unmodified cotton and cottons finished with high levels of seven different phosphorus‐containing flame retardants were pyrolyzed in a temperature‐programmed solid probe of a mass spectrometer, and mass spectra were recorded continuously throughout the pyrolyses. The spectra at the maximum rates of volatiles e…
Abstract Infrared spectra of imidazolidine-2-thione (N,N′-ethylenethiourea, ETU) and its N,N′-deuterated (ETU-d2) and S-methylthiouronium iodides have been recorded from 4000 to 30 cm−1. Normal coordinate analyses of ETU and ETU-d2 have been made for all the fundamental frequencies, employing a Urey-Bradley potential…
In order to express the sizes and geometrical anisotropies of void spaces in a random fiber assembly that has an arbitrary distribution of fiber orientation, two quantities (aperture circle and free length) are introduced and their distributions are derived mathematically. It is found that the approximate probability…
The reaction of hydrogen with uranium powder was investigated at 13.3 and 26.6 kPa between 50° and 250°C. The reaction order was independent of temperature but varied from two‐thirds order at 13.3 kPa to first order at 26.6 kPa. Increasing temperatures resulted in decreasing reaction rates over the temperature range s…
Laboratory tests were carried out to compare the electrochemical characteristics of galvanic couples made of aluminum alloys (1050, 5086, 2024, and 7075) with other metals (plain steel, Type 316 stainless steel, titanium) in tap water and in artificial sea water. It was found that: One must first choose materials whic…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFast Neutron Irradiation Effects on Polymers. 1. Degradation of Poly(methyl methacrylate)Shigenori Egusa, Kenkichi Ishigure, and Yoneho TabataCite this: Macromolecules 1979, 12, 5, 939–944Publication Date (Print):September 1, 1979Publication History Published online1 May 200…
The addition of a ${B}_{\mathrm{ij}}{S}_{i}^{x}{S}_{j}^{x}$-type coupling between the tunneling motion of one proton and the tunneling motion of another to the Ising model in a transverse-field Hamiltonian, or the addition of the probably larger ${S}_{i}^{x}{F}_{i}^{x}{Q}_{i}$-type pseudospin phonon coupling (describi…
Commercially pure α-Ti has been plastically deformed by rolling to strains up to 97%. Optical and electron metallographic observations on the deformed material have then been related to changes in the hardness and texture. It is concluded that, at strains of up to 20%, strain twinning is the major mode of deformation,…
Abstract Electron microscopy and dynamic mechanical spectroscopy (DMS) techniques were used to study the morphology and glass transition behavior of simultaneous interpenetrating networks (SIN's), based on three different castor oil derived elastomers, and polystyrene (PS) plastic erosslinked with 1 percent divinyl be…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCalculation of a phase diagram for the lithium oxide-aluminum oxide (LiO0.5-AlO1.5) systemHarlan J. Byker, Isaac. Eliezer, Naomi. Eliezer, and Reed A. HowaldCite this: J. Phys. Chem. 1979, 83, 18, 2349–2355Publication Date (Print):September 1, 1979Publication History Publish…
Ein komplettes System zur Wasserzerlegung durch Licht (250W‐Lampe) besteht aus den Katalysatoren Pt und RuO 2 sowie dem Sensibilisator Ru(bpy) und dem Acceptor Methylviologen (MV 2+ ). 150 ml Lösung ergaben in 3 h 0.6 ml H 2 und 0.3 ml O 2 . magnified image
Four different film evaluation techniques, prism coupling, reflectance spectroscopy, ellipsometry, and mechanical measurement of a step height, have been compared by measuring the thickness and refractive index of thermally grown silicon dioxide and plasma‐deposited silicon nitride films. The four methods have similar…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTChemical reactivity of supported gold. A structural study by small-angle x-ray scattering and x-ray absorption spectroscopyG. Cocco, S. Enzo, G. Fagherazzi, L. Schiffini, I. W. Bassi, G. Vlaic, S. Galvagno, and G. ParravanoCite this: J. Phys. Chem. 1979, 83, 19, 2527–2538Pub…
Abstract Reversible plasticization of nylons with anhydrous ammonia is a new concept. In the present studies, nylons 6 and 11 have been plasticized with anhydrous ammonia and subsequently were solid‐state coextruded below the melting point. The plasticization is attained by a temporary disruption of the strong hydroge…
We present theoretical calculations for energy transfer and two-center optical processes involving simultaneous rare-earth electronic and O${\mathrm{H}}^{\ensuremath{-}}$ vibrational transitions in condensed matter. Along the lines sketched at the 1978 Paris Luminescence Conference [(J. Luminescence 1979)]. We use an…
Biopsies of sutured and grafted primate peripheral nerves were examined by light and electron microscopy after the final set of electrical measurements had been recorded. Inspection of all proximal stumps showed the expected regenerative activity which was not affected by the nature of the nerve repair. Transverse sec…
Transmission electron microscopy of single-cryatal non-stoichiometric spinel (MgO. 3–5 A12O3) deformed in compression at 1500°C have revealed dislocation networks in which the ½〈110〉 dislocations are extended by climb into ¼〈110〉 collinear partials. Dislocation nodes of two types are found, both of the form ½[110] + ½…