Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDetermination of sulfur in asphalts by selective oxidation and photoelectron spectroscopy for chemical analysisJean Michel. Ruiz, Brian M. Carden, Louis J. Lena, Emile Jean. Vincent, and Jean Claude. EscalierCite this: Anal. Chem. 1982, 54, 4, 688–691Publication Date (Print)…
An important characteristic of a grain boundary is the depth to which its displacement field penetrates into the neighbouring single crystals. This boundary thickness, which is called the ‘structural width’ in this paper, may be studied by the use of an electron diffraction technique which is sensitive to the width of…
Abstract Die Phasenverhältnisse im System Cer‐Wasserstoff wurden neu untersucht. Im Gegensatz zu den bisherigen Literaturangaben konnte bei den kubischen Hydriden eine Abnahme der Gitterparameter mit steigendem Wasserstoffgehalt nur bis zu einer Zusammensetzung von CeH 2,30 beobachtet werden, bei noch größeren Wassers…
Abstract Degradation of polyethylene in both linear (NBS 1475) and branched (NBS 1476) form has been studied in the range 410–475°C using factor‐jump thermogravimetry. In vacuum, the rate of weight loss was erratic because of bubbling in the sample. The apparent overall activation energy was determined to be 65.4 ± 0.…
To increase the power throughput to a plasma of an existing lower hybrid waveguide, secondary electron production on the walls and subsequent electron multiplication must be reduced. Since carbon has a low secondary electron coefficient (δ), measurements were performed for several UHV compatible carbon coatings (Aquad…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAb initio study of valence-state potential energy curves of nitrogenW. C. Ermler, A. D. McLean, and R. S. MullikenCite this: J. Phys. Chem. 1982, 86, 8, 1305–1314Publication Date (Print):April 1, 1982Publication History Published online1 May 2002Published inissue 1 April 198…
Using a pulse counting technique, inceptions of positive and negative point-plane corona in SF6 under dc and 60-Hz ac conditions were measured. Effects of gas pressure, UV-radiation, and point electrode size on differences between ac and dc, and between positive and negative inceptions were investigated. Inceptions we…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCharacterization of several novel iron nitrosyl porphyrinsL. W. Olson, D. Schaeper, D. Lancon, and K. M. KadishCite this: J. Am. Chem. Soc. 1982, 104, 7, 2042–2044Publication Date (Print):April 1, 1982Publication History Published online1 May 2002Published inissue 1 April 19…
Superconductivity of the alkali-metal amalgam graphite intercalation compounds of stage 1 (${\mathrm{C}}_{4}$KHg, ${\mathrm{C}}_{4}$RbHg) and stage 2 (${\mathrm{C}}_{8}$KHg, ${\mathrm{C}}_{8}$RbHg) has been studied as well as that of the pristine amalgams (KHg, RbHg). The transition temperatures are 0.73, 0.99, 1.90,…
A survey is presented of the experimental work which has been carried out on the abrasive wear of metals. The effect of variables such as surface hardness, abrasive hardness, abrasive particle size, and velocity are discussed for several types of abrasive wear. The similarities between different types of wear are desc…
Abstract Owing to their particular crystallographic properties, ferrimagnetic hexagonal ferrites exhibit a far greater coercive force than the conventional magnetic pigments. They therefore appear to be suitable for use in magnetic information storage procedures, some of which are novel and are at the development stag…
ADVERTISEMENT RETURN TO ISSUEArticleNEXTA Fourier transform infrared study of low-frequency vibrations in a supported molybdenum catalystS. Razi Seyedmonir, Suheil Abdo, and Russell F. HoweCite this: J. Phys. Chem. 1982, 86, 8, 1233–1235Publication Date (Print):April 1, 1982Publication History Published online1 May 20…
We have determined phase diagrams (using the light microscope) and pitch (using a wedge geometry) for cholesteryl propionate mixed with various nematics and a chiral nematic mixed with cyanohexyloxybiphenyl (6OCB). We have succeeded in untwisting both blue phases, BPI and BPII of the latter mixture in an electric fiel…
Abstract A model of melt spinning has been developed for speeds above which the effects of gravity, inertia, and aerodynamic drag become significant. The model has as an upper bound the speed at which stress crystallization begins to occur on the spin line. For poly(ethylene terephthalate), these velocities are approx…
XPS has been used to elucidate the mechanisms of surface modification of low density polyethylene by electrical (“corona”) discharge treatment and by chromic acid treatment. The use of derivatisation techniques for improving the precision of functional group analysis is described. These techniques also allow the role…
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…