Materials Literature
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A design technique for improving the impulse voltage distribution along the axial length of a large aircore power reactor is presented. A set of conducting rings is used to linearize the voltage distribution across the reactor windings. The number, the dimensions and the relative locations of the grading rings are det…
The concentration profile of various dopants (germanium, phosphorus, and fluorine) in preforms and optical fibers has been obtained with a Raman microprobe. A 2-microm spatial resolution was achieved. In the case of germanium and phosphorus, the results agree quite well with those obtained with an electron microprobe.…
Abstract Reactions undergone by leadhillite from the type locality on heating to 1000°C have been followed by DTA, TG, DSC, evolved gas analysis, continuous-heating XRD and IR, and hot-stage microscopy. Intermediate decomposition products were identified by X-ray powder photography. At 80°C, biaxial leadhillite invert…
Abstract There are technical, as well as economical, advantages to employ light‐stable polyvinyl chloride heat stabilizers for rigid weatherable applications. The desirable stabilizer systems should also be less or non‐toxic, without sulfur staining problem, with acceptable odor, with stable and competitive economics.…
Abstract Crystalline particles of cyclic oligomers are formed on the surface of poly(ethylene terephthalate) (PET) films during heat treatment or exposure to solvent vapor. The formation of crystals of oligomers due to heat treatment can be prevented by depositing onto the PET films morphologically continuous coatings…
The use of only the thermodynamic approach in the investigation of the phenomena of temper embrittlement and impurity segregation is insufficient for the complete understanding of such processes. To explain correctly those phenomena, it is suggested that the phase transformation theory and the data from structural stu…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEPR of copper(II) complexes with tripodal ligands: dynamical propertiesG. Kokoszka, K. D. Karlin, F. Padula, J. Baranowski, and C. GoldsteinCite this: Inorg. Chem. 1984, 23, 25, 4378–4380Publication Date (Print):December 1, 1984Publication History Published online1 May 2002P…
This paper addresses overload characteristics of thermoset dielectric power cable systems. Present industry specificationsl, 2 recommend a maximum emergency conductor temperature of 130°C. The suitability of this temperature and the time it is to be maintained has been questioned. The present work indicates that cross…
Abstract In this study, natural, delaminated and silane‐treated micas were screened to give fractions passing 60 to 325 screen mesh sizes. The micas were used as fillers (to 80 wt. percent) in plasticized PVC compounds, their dispersion behavior and their effects on mechanical properties of compounds being noted, and…
Abstract Polymers with conductivities from 8.6 × 10 0 to 7.3 × 10 −6 (ω cm) −1 at 2–12 kbar were prepared by zinc‐chloride‐catalyzed condensation of polycyclic aromatic hydrocarbons, heterocycles, and quinones with pyromellitic dianhydride, tetrabromophthalic anhydride, and tetrachlorophthalic anhydride at 450°C. Thes…
The piezoelectric resonance method was adopted in order to measure piezoelectric and elastic constants of polyvinylidene fluoride films over the temperature range from −40 to 60 °C and at pressure up to 3 kbar. We have shown that the glass transition temperature increases with pressure, dTg/dP being approximately equa…
Atom Probe Field-Ion Microscopy and Transmission Electron Microscopy have been used to characterize the microstructure and to determine the changes that occur during long-term low-temperature aging of primary coolant pipes used in pressurized water nuclear reactors. The cast CF 8 type stainless steel forms a mixture o…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe mean excitation energy for stopping power I, the Bragg rule, and chemical and phase effects. Application of a statistical treatment to the determination of I for chemically bound particlesEfstathios KamaratosCite this: Chem. Rev. 1984, 84, 6, 561–576Publication Date (Pri…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThermodynamics of proton ionization from poly(vinylammonium salts)Edwin A. Lewis, Thomas J. Barkley, R. Renee Reams, Lee D. Hansen, and Thomas St. PierreCite this: Macromolecules 1984, 17, 12, 2874–2881Publication Date (Print):December 1, 1984Publication History Published on…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and structural characterization of a cationic rhenium selenoxoformaldehyde complexFred B. McCormickCite this: Organometallics 1984, 3, 12, 1924–1927Publication Date (Print):December 1, 1984Publication History Published online1 May 2002Published inissue 1 December 1…
A family of variable-index spherically symmetric lenses is presented that provide the light focusing at two (or three) points, subject to an appropriate division of the aperture.
A procedure which permits the evaluation of the stress-strain field in an elastomeric seal is presented. Such a procedure is based upon a mechanical modeling of the elastomer and on the employ of finite elements which can cope with high strains. Finally, the above-mentioned procedure is checked against experimental re…
ADVERTISEMENT RETURN TO ISSUEPREVArticleSingle-crystal EPR spectra of tetra-n-butylammonium bis(isotrithione-3,4-dithiolato)cuprate(II) (copper-63)Joachim Stach, Reinhard Kirmse, Wolfgang Dietzsch, Ruth Maria Olk, and Eberhard HoyerCite this: Inorg. Chem. 1984, 23, 26, 4779–4780Publication Date (Print):December 1, 198…
The solubility of 17 beta-oestradiol (E2) in aqueous solutions of polyethylene glycol (PEG) 400 has been measured at 35 degrees C. Up to 80% w/w PEG the solubility data conform to a log linear equation ln S = ln Sw + f sigma where S is the E2 concentration in the water/cosolvent mixture, Sw is E2 solubility in water,…
Measurements of Mössbauer absorption spectra of 57 Fe : La 2 Ni O 4 at 297, 77, and 4.2 K provide evidence, at the lowest temperatures, of magnetic order in a sample containing 57 Fe 3 + -ion impurities and some La 2 + n Ni 1 + n O 4 + 3 n intergrowth. Mössbauer emission spectra of 57 Co : La 2 Ni O 4 at 77 and 4.2 K…