Materials Literature
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Abstract The Raman spectra of supported molybdena‐alumina catalysts are reversibly modified by changing the laser power falling on the sample, which was examined in air. O 2 calcination or evacuation at 500–700°C produces the same modification if in situ characterization is performed. Subsequent contact with the ambie…
Abstract Quantitative thin‐section electron microscope studies were made on compositional fractions of ethylene copolymers crystallized under several extreme conditions. The co‐units chosen were such that the chains contained either ethyl, hexyl, or acetate side groups. Certain general features are independent of the…
Reversed Na-K exchange data between mica and a 2 molal aqueous (Na,K)Cl fluid (Flux & Chatterjee, 1986) have been employed to model the thermodynamic mixing behaviour of muscovite-paragonite crystalline solutions on the basis of the Redlich-Kister equation. For these binary micas, Gexm may be expressed as where A=1122…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOpposite regioselectivity in the epoxidation of geraniol and linalool with molybdenum and tungsten peroxo complexesAntonio Arcoria, Francesco Paolo Ballistreri, Gaetano Andrea Tomaselli, Fulvio Di Furia, and Giorgio ModenaCite this: J. Org. Chem. 1986, 51, 12, 2374–2376Publi…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTReduction of nitric oxide with ammonia on alumina- and titania-supported metal oxide catalystsWing C. Wong and Ken NobeCite this: Ind. Eng. Chem. Prod. Res. Dev. 1986, 25, 2, 179–186Publication Date (Print):June 1, 1986Publication History Published online1 May 2002Published…
Abstract A new series of thermotropic liquid‐crystalline polymers, poly(vinyl ether)s and poly(propenyl ether)s, containing the mesogen 4‐methoxy‐4′‐hydroxybiphenyl in the side chain and different spacers between the mesogens and the backbone were synthesized and characterized by DSC and optical microscopy. Their meso…
Abstract The generally accepted kinetic mechanism for free radical copolymerization was simplified by various assumptions and restrictions to give several realistic and easily evaluated models for the simulation of industrial molding. Six assumptions, including conversion‐dependent rate coefficients and constant comon…
The elastic nonlocal moduli are first determined from an auxiliary problem involving longitudinal waves in an infinite nonlocal medium. A comparison of the dispersion equation obtained with that derived in the lattice dynamics of Born and von Kármán is made. Constitutive equations of Kroener and Eringen are introduced…
The paper shows an extension of the technique of open-circuit thermally stimulated discharge (TSD), consisting of simultaneously measuring the current and its charge on the external circuit as a function of temperature. The current is measured with a strongly damped meter which fails to give a time-resolved record of…
Abstract Von strahlenchemisch durch Gasphasen‐Pfropfung hergestellten Pfropfprodukten aus Polyethylen und Styrol wurden die Anteile an Homopolymerem und gepfropftem Styrol, die Struktur der Pfropfprodukte (an Hand von elektronenmikroskopischen Aufnahmen) sowie einige mechanische Eigenschaften in Abhängigkeit von der P…
SUMMARY A previous study with a range of soils indicated that adsorption of copper could not be adequately described by the Freundlich equation. Adsorption curves for all but a highly calcareous soil could be divided into two straight lines with a marked increase in slope at low solution concentrations. A computer pro…
Abstract This paper describes the structure and derivation of ‘classical’ silicone fluids, giving the reactions for the production of dimethyl fluids by Miiller‐Rochow synthesis, polymerisation, direct synthesis, hydrosilylation, and transesterification. The properties of siloxanes are described, and the applications…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFailure mechanisms for organic coatings subjected to 0.1M sulfuric acidMalcolm L. White, Hyacinth Vedage, Richard D. Granata, and Henry Leidheiser Jr.Cite this: Ind. Eng. Chem. Prod. Res. Dev. 1986, 25, 2, 129–132Publication Date (Print):June 1, 1986Publication History Publi…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCarbonization in a tube bomb. 1. Carbonization of petroleum residue into a lump of needle cokeIsao Mochida, Yozo Korai, Yasuhiro Nesumi, and Takashi OyamaCite this: Ind. Eng. Chem. Prod. Res. Dev. 1986, 25, 2, 198–201Publication Date (Print):June 1, 1986Publication History P…
Ethylene oxidation to ethylene oxide and to carbon dioxide over silver catalysts was studied in a CSTR. The effects of two factors on the catalyst performance were examined. The first was the presence of excess ethylene oxide in the feed. A kinetic model was introduced which assumed that ethylene and ethylene oxide co…
Electron-energy-loss spectra of pure Li metal from 0 to ∼ 75 eV have been obtained for the first time in an analytical electron microscope. The spectrum is compared with density-of-states calculations and results from other spectroscopic techniques as well as with energy-loss spectra of slightly oxidized Li.
Abstract Silver island films are shown to be stable under normal laboratory conditions, and easy to use as optical sensors for the detection of traces of tetrasulphonated copper phthalocyanine. The surface‐enhanced Raman (SER) effect is used in conjunction with a resonance Raman (RR) increase in the analytical signal…
Abstract To combat the problem of specimen charging when analysing insulators with a high energy monochromatic AgLα x‐ray source for XPS in the VG ESCA3, the application and use of a low energy electron flood gun is investigated. It is found that individual specimens can require widely differing ‘optimum’ conditions f…
Abstract The approximate maximum and minimum amounts of any phase in a complex mineral mixture can be determined by solving a linear programming problem involving chemical mass balance and X-ray powder diffraction (XRD) data. The chemical information necessary is the bulk composition of the mixture and an estimation o…
Abstract Water vapor transmission rates can be reduced by as much as 50% in polyethylene by using talc as a filler. The oxygen permeability as well as water vapor transmission rates are similarly reduced by talc in nylon 6 films. The films show low elongation at break and reduced breaking strenth in the presence of ta…