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Impact and tensile properties of polypropylene filled with various minerals have been measured. The minerals investigated were dolomite, calcium carbonate, mica and wollastonite. The effect of particle shape, size, content and surface treatment on mechanical properties was studied. A special interest was devoted to th…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructure and catalytic activity of alumina-supported platinum-cobalt bimetallic catalysts. 2. Chemisorption and catalytic reactionsLaszlo Guczi, Tamas Hoffer, Zoltan Zsoldos, Souad Zyade, Gilbert Maire, and Francois GarinCite this: J. Phys. Chem. 1991, 95, 2, 802–808Publica…
Investigations to determine the relevant electric and dielectric properties of certain insulating fluids which appeared most suitable from the viewpoint of environmental compatibility and inflammability are discussed. Two of these are silicone fluids based on linear polydimethyl siloxane (kinematic viscosity at 25 deg…
The effects of self-radiation damage due to alpha decay was studied as a function of cumulative decay events in synthetic zircon doped with 238Pu. The density of the Pu-doped zircon decreased exponentially with dose to a value corresponding to a density change of 14.2% at saturation. The initially crystalline material…
The thermal shock behavior of Si 3 N 4 has been determined with a new type of computer‐controlled testing equipment. Thin circular disks are heated up to 1350°C with two tungsten halogen lamps yielding heating rates up to 1000°C/s. The sample temperature is measured in situ with an infrared pyrometer and used to calcu…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAntiplasticization effects on a secondary relaxation in plasticized glassy polycarbonatesK. L. Ngai, R. W. Rendell, A. F. Yee, and D. J. PlazekCite this: Macromolecules 1991, 24, 1, 61–67Publication Date (Print):January 1, 1991Publication History Published online1 May 2002Pu…
Low temperature optical spectra of semiconductor microcrystals grown in a glass matrix demonstrate the effect of size quantization of the energy spectrum of Coulomb interacting electron-hole pairs. The phenomena and microscopic mechanism of ionization of microcrystals under optical excitation are regarded.
—When K. L. Mittal asked me to provide a historical account of the applications of silane coupling agents in adhesion, I decided to write in the form of a personal account of my last 45 years in this line of study. No attempt is made to make the history comprehensive, or to recognize the host of other researchers who…
X-ray photoelectron spectroscopy (ESCA), wettability measurements, and an ink adhesion test were used to characterize changes in the surface properties of air-corona-treated polypropylene (PP) films upon aging under a variety of storage conditions. No changes in ESCA O/C atomic ratios as a function of aging were obser…
The relation between deformation mode and β phase stability was investigated using Ti-16V and Ti-7Cr base alloys doped with Sn, Zr and Al as ternary or quaternary additions. Sn and Al additions change the dominant deformation mode from (332) twinning in the binary alloys to deformation induced martensitic transformati…
Functionally Gradient Materials (FGMs) characterized by the material having continuously varying material property from one surface to the other, have been prepared using gas, liquid or solid as starting material via several methods such as CVD, PVD, ion plating, plasma spraying, sintering or self-propagating high tem…
High-luminance green emission has been achieved from an electroluminescent (EL) device consisting of a Zn 2 SiO 4 :Mn thin-film phosphor and a thick BaTiO 3 ceramic insulator. The EL characteristics are strongly dependent on the preparation conditions of the Zn 2 SiO 4 :Mn thin film deposited by rf magnetron sputterin…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTExchange coupling and resonance delocalization in reduced iron-sulfur [Fe4S4]+ and iron-selenium [Fe4Se4]+ clusters. 1. Basic theory of spin-state energies and EPR and hyperfine propertiesLouis NoodlemanCite this: Inorg. Chem. 1991, 30, 2, 246–256Publication Date (Print):Jan…
Silicon oxynitride ceramics were prepared by hot‐pressing an equimolar Si 3 N 4 + SiO 2 mixture with 3 mol% CeO 2 . The Ce 2 O 3 /SiO 2 ratio of intergranular phase (liquid phase) increased as the formation of Si 2 N 2 O proceeded. The intergranular liquid remained as a glass on cooling until the Ce 2 O 3 /SiO 2 ratio…
Abstract
An original method of analyzing the foam-active compounds in Champagne base wine was used, by extraction of a foam wine; after the collection of foam (by constant artificial effervescence), which collapsed into a foam wine, we analyzed the latter comparatively with the remainder wine (which remained after the extracti…
Changes in the crystallinity and polymorph of chitosan, which may affect its functionality, by heating (up to 200°C) its water suspension were studied by X-ray diffraction measurements, using tendon chitosan prepared by N-deacetylation of a crab tendon chitin, and chitosan powders with various degrees of polymerizatio…
The mixed-valence states in Cs2AuIAuIIIX6(X = Cl, Br or I) were systematically studied by X-ray photoelectron spectroscopy of the Au 4f region for the first time. The gold valence states in halogeno complexes of AuI and AuIII were also studied. In Cs2Au2X6 the difference between the oxidation state of AuI and that of…
Theoretical and experimental analyses are presented of the electromagnetic transient following the out-of-phase synchronization of a three-phase five-limb step-up transformer; this means an abnormal condition where the angle between phasors representing the generated voltages and those representing the power network v…
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