Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhotoisomerization of 2-(trimethylsilyl)pyrrolesThomas J. Barton and Gregory P. HussmannCite this: J. Org. Chem. 1985, 50, 26, 5881–5882Publication Date (Print):December 1, 1985Publication History Published online1 May 2002Published inissue 1 December 1985https://pubs.acs.or…
Abstract The inclusion of Re in Pt‐Re‐Al 2 O 3 reforming catalysts to improve the lifetime is known, but how rhenium functions and how it is disposed in the catalyst remain unclear. These fundamental questions have been attempted in this study by the use of proton‐induced X‐ray emission and Rutherford backscattering s…
The visual and electrical effects of arced SF6 gas on epoxy spacers with various fillers are examined. Field experience and laboratory investigations into the dielectric degradation of epoxy spacers and maintenance techniques for identifying serious loss of dielectric withstand are discussed. Rehabilitation of damaged…
Abstract Ultrasonic absorption, velocity, adiabatic compressibility, relaxation time and relaxation amplitude measurements are reported on poly(vinyl chloride) (PVC) solution in tetrahydrofuran (THF) using pulsed ultrasonic apparatus operating at 2 MHz and 313 K. Results show a linear increase of velocity. density, vi…
Abstract Novel photochromic compounds, indolinospirobenzothiopyrans, were prepared and their properties in polymer films were examined. The absorption bands of the colored form lie around 100 nm deeper in the long-wave region of the spectrum than are the case with the common spiropyrans.
The stationary spatial correlations of the director field of a nematic liquid crystal near the Freedericksz transition in a magnetic field with a time-dependent random component are studied by means of a stochastic dynamical model. A correlation length is shown to diverge at a shifted instability point.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOxidation of ethanol and acetaldehyde on silica-supported platinum catalysts: preparative and pretreatment effects on catalyst selectivityMasatoshi Nagai and Richard D. GonzalezCite this: Ind. Eng. Chem. Prod. Res. Dev. 1985, 24, 4, 525–531Publication Date (Print):December 1…
In this paper a theory is developed for K iscc based on hydrogen induced fracture due to plastic flow on a localized scale within the crack-tip plastic zone. The theory is qualitatively and quantitatively consistent with experimental data on the influence of yield strength and hydrogen content on the threshold level a…
Abstract An intumescnt material has been developed, based on alkali silicates, which can be used in fire protection in the form of sheets or boards which can be joined to various materials, ranging from wood and wood products to metal. The swelling of the material on heating to over 100°C or on contact with a flame is…
Tenfold twins have been found in a splat-quenched NiZr alloy by selected-area electron diffraction, dark-field and high-resolution electron microscopy. The NiZr phase has a C-centred orthorhombic lattice and the twinning plane is either (110) or (100) with an angle of about 36° between these two planes. The relationsh…
Abstract The sulfation rates of reagent grade calcium and zinc oxides and technical grade magnesium oxide with sulfur trioxide and sulfur dioxide ‐ oxygen mixtures have been measured thermogravimetrically. Experiments have been conducted to determine the rate of reaction for various particle radii (0.071‐0.151 mm), te…
A numerical method has been devised which enables the simultaneous changes of solute distribution in the solid and the liquid in the solidifying volume between secondary dendrite arms to be described. Simplifying assumptions are made in the geometric model, but not of solid or liquid diffusivities. A previously used f…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMolecular distortions and solid-state cadmium-113 NMR: crystal and molecular structure of the piperidine adduct of (5,10,15,20-tetraphenylporphyrinato)cadmium(II), cadmium-113 NMR solution and solid-state spectra and potential energy calculationsP. F. Rodesiler, E. A. H. Gri…
The aragonite-calcite and calcite-lime transformations are observed in situ in the high voltage transmission electron microscope. Above 400C aragonite single crystals begin to transform into calcite through heterogeneous nucleation on dislocations, twin boundaries, and modulated microstructures. Subsequent growth is g…
Abstract The selection of elementary calibration standards for X‐ray photoelectron spectrometers is discussed; it is suggested that Zn and Ga may be more satisfactory routine single‐element standards than Cu, Ag or Au. Binding energies for the 2p 3/2 and 3d photoelectron peaks from elemental Zn, Ga (and Ge) and for th…
Some recent developments in the dislocation theory of plastic deformation in ionic crystals are reviewed. It has been found that the Peierls force operates on slip planes of type {110} and {00l}, that interactions between dislocations and point defects are different on these planes, that point defects are produced by…
Abstract Interstratified illite-smectites from Carboniferous sediments from the Alston and Askrigg blocks and the intervening Stainmore trough of the northern Pennines, UK, were examined by XRD. Both blocks are underlain by Caledonian granites. During late Carboniferous times sediments overlying the Alston block were…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation R. G. Larson; Nonlinear Shear Relaxation Modulus for a Linear Low‐Density Polyethylene. J. Rheol.…
Abstract Die Oxidsulfide A — CaLaGa 3 S 6 O a = 9,2706(8), c = 6,0351(9) Å; B — SrLaGa 3 S 6 O a = 9,347(10), c = 6,0893(10) Å; C — La 2 ZnGa 2 S 6 O a = 9,3653(15), c = 6,0928(10) Å und D — Sr 2 ZnGe 2 S 6 O a = 9,4054(7), c = 6,1718(7) Å wurden erstmals präpariert. Für A und C wurden die Lageparameter mit Einkristal…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA vibrational spectroscopic characterization of the solid-phase behavior of n-decylammonium chloride (n-C10H21NH3Cl) and bis(n-decylammonium) tetrachlorocadmate [(n-C10H21NH3)2CdCl4]H. L. Casal, D. G. Cameron, and H. H. MantschCite this: J. Phys. Chem. 1985, 89, 25, 5557–556…