Materials Literature
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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…
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…