Materials Literature
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Data on the overall conversion of coal-nitrogen to NOx were obtained at 1250 K and 1750 K for a residence time of one second. The conversion of coal-nitrogen to NOx decreased monotonically with increasing fuel/oxygen equivalence ratio and decreased slightly with increasing temperature. Oxidation experiments were also…
Abstract The molecular structures of partially cured polyaminopropylsilsesquioxane and aminopropyltriethoxysilane in water have been studied using Fourier‐transform infrared, laser Raman, and quasielastic laser light‐scattering spectroscopy. A multiply hydrogen‐bonded structure is proposed for the intramolecularly int…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLigand, oxygen, and carbon monoxide affinities of iron(II) modified "capped" porphyrinsToshiaki Hashimoto, Jack E. Baldwin, Fred Basolo, Robert L. Dyer, and Maxwell J. CrossleyCite this: J. Am. Chem. Soc. 1982, 104, 8, 2101–2109Publication Date (Print):April 1, 1982Publicati…
Abstract The heat of fusion of virgin and melt‐processed polytetrafluoroethylene (PTFE) was determined using the Clapeyron equation. Experimental data were obtained from PVT experiments and high‐temperature x‐ray diffraction measurements. For virgin, as‐polymerized PTFE, the melting temperature is given by where, for…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and characterization of a new surface derivatizing reagent to promote the adhesion of polypyrrole films to N-type silicon photoanodes: N-(3-(trimethoxysilyl)propyl)pyrroleRichard A. Simon, Antonio J. Ricco, and Mark S. WrightonCite this: J. Am. Chem. Soc. 1982, 104…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEuropium luminescence lifetimes and spectra for evaluation of 11 europium complexes as aqueous shift reagents for nuclear magnetic resonance spectrometryCharles C. Bryden and Charles N. ReilleyCite this: Anal. Chem. 1982, 54, 4, 610–615Publication Date (Print):April 1, 1982P…
Conducting films of polypyrrole can be modified by introducing substitutents into the cationic pyrrole polymer or by varying the accompanying anion. The electrochemical route for the preparation of these films is particularly convenient for making these modifications since the variations are made in the selection of t…
A sensitive method for determination of the amount of absorbed hydrogen and its forms in metal (steel) is described. The method is based on the electrochemical measurement of hydrogen desorption rate. An analysis of the pertinent equations for the diffusion controlled desorption process is given and suggestions are ma…
Abstract A number of commercially available polycarbonates, including formulations made flame retardant by two different modifications, have been exposed to conditions producing moderately rapid hydrolysis. Hydrolysis rates were calculated from molecular weight data determined by gel permeation chromatography and, in…
At room‐temperature the Raman spectrum was second‐order, in agreement with, the selection rules for the cubic perovskite structure. The second‐order spectrum originates largely from pairs of phonons with wave vectors near the Brillouin zone boundary. First‐order Raman‐active modes predicted in the tetragonal phase of…
Abstract Polypropylene reinforced with glass fiber (28 percent by weight) was injection molded under different processing conditions. The influence of injection‐molding parameters such as pressure, injection speed, and injection temperature on the morphology and mechanical properties was studied using standard techniq…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTKinetics of coal gasificationMartin Schmal, Jose Luiz Fontes Monteiro, and Jorge Luiz CastellanCite this: Ind. Eng. Chem. Process Des. Dev. 1982, 21, 2, 256–266Publication Date (Print):April 1, 1982Publication History Published online1 May 2002Published inissue 1 April 1982h…
Abstract Die Arbeit gibt einen Überblick über Forschungsergebnisse des Max‐Planck‐Instituts für Metallforschung auf dem Gebiet der Umwandlungsverstärkung keramischer Werkstoffe. Die kontrollierte Ausnutzung der tetragonal → monoklinen Phasenumwandlung dispergierter ZrO 2 ‐Teilchen ermöglicht eine Reihe unterschiedlich…
Abstract An expression for the impluse due to a vapour (cavitation) bubble is obtained in terms of an integral over a nearby boundary. Examples for a point source near a free surface, rigid boundary, inertial boundary and a fluid of different density are considered. It appears that the sign of the impluse determines t…
Measurements of the sound velocity c in water, heavy water, and water–ethanol mixtures have been carried out in a temperature range extending from room temperature to the supercooled region above -20 °C, by Brillouin light scattering technique. Pure H2O and D2O show a strong anomalous behavior which can be described b…
Disodium cromoglycate in water (~10-15% by weight) forms a nematic liquid crystalline phase of negative diamagnetic anisotropy which readily orients in a magnetic field. The phase transition temperatures are very sensitive to the nature and concentration of the cationic species. Addition of chiral guest molecules, and…
A survey of the spectral, electrochemical, and chemical properties of organic and inorganic 2,2′-bipyridine (bpy) radical derivatives leads to the conclusion that these species form a common family whose properties are largely determined by those of bpy, the one-electron reduction product of bpy.
The low-temperature heat capacity of the superconducting ${\mathrm{LaS}}_{x}$ ($1.333<~x<~1.500$) compounds with the ${\mathrm{Th}}_{3}$${\mathrm{P}}_{4}$-type structure were measured from 1.3 to 20.0 K in magnetic fields of 0, 2.50, 5.39, 7.62, and 9.98 T. The compositional variation of the electronic specific-…
The aim of this paper is to review our present knowledge of the physics of electrical coronas and their interaction with surfaces, with some emphasis on phenomena which seem of importance for high voltage insulation. We will concentrate on fundamental and general subjects, in order to limit the scope of the paper and…
Abstract Imogolites in which a part or all of Si was substituted with Ge were synthesized from solutions containing aluminum ion and silicic and/or germanic acid. The products were similar to natural imogolite in their tubular morphology, electron diffraction patterns, and differential thermal analysis curves. However…