Materials Literature
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A series of new anisotropic magnet alloys has been developed in low-cobalt (5 - 11.5wt%) ternary Cr-Co-Fe system using a new "deformation-aging" technique that induces a strong magnetic anisotropy (Br/Bs ∼ 0.99) without magnetic field heat treatment. The prerequisite condition for the deformation-aging is a micro-stru…
Abstract Es wurde das Oxidationsverhalten der Gußwerkstoffe 1.4848, 1.4857, 2.4813 und einer 25/20/5‐CrNiSi‐Versuchsschmelze sowie der Knetwerkstoffe 1.4301 und 1.4841 in trockener synthetischer Luft zwischen 800 und 1300° C untersucht. Nur die Oxidation der Werkstoffe 1.4848 und 1.4841 erfolgte angenähert parabolisch…
The discharge reaction taking place within the confinement of an experimental analog, simulating porous electrode behavior, is examined in terms of the solution‐precipitation path for the system. A scanning electron microscopic (SEM) investigation, combined with an analytical treatment of a simplified model of nucleat…
Abstract Dimer acids are the commercial products resulting from clay‐catalyzed, high temperature polymerization of unsaturated fatty acids, usually tall oil fatty acids. The products have been commercially available since the 1950s and now, in all forms, represent 40–50 million pounds per year sales in the United Stat…
The C—H stretching and C—H bending vibrations of the methylene, α-methyl, and ester methyl groups of poly(methyl methacrylate) are discussed and assigned on the basis of the infrared spectra of its three deuterated derivatives: PMMA—CD 3 —OCD 3 , PMMA—CD 2 —OCD 3 , and PMMA—CD 2 —CD 3 . The digital analog of PMMA is o…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCrystal structure and magnetic properties of bis(.mu.-aqua)bis-.mu.-[N,N'-bis(2-hydroxyethyl)dithiooxamidato(2-)-N,O,S':N',O',S']-bis[aquacopper(II)sulfatocopper(II)]. A new example of very strong antiferromagnetic coupling between copper(II) ions far away from each otherC.…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTConformational Energies and the Random-Coil Configuration of Poly(oxypropylene)Akihiro Abe, Tsuneo Hirano, and Teiji TsurutaCite this: Macromolecules 1979, 12, 6, 1092–1100Publication Date (Print):November 1, 1979Publication History Published online1 May 2002Published inissu…
Abstract 1 H‐NMR spectra of polyisoprene were assigned using polymers of isoprene‐1,1,4,4‐ d 4 , isoprene‐1,1,5,5,5‐ d 5 , and isoprene‐4,4‐ d 2 polymerized with various catalysts. The methylene‐proton signal at 2.1 ppm in cis ‐1,4 ‐ and trans ‐1,4‐polyisoprenes was divided into H 4 ‐ and H 1 ‐proton signals; H 4 reso…
Abstract The filler particles in most filled polymers are not perfectly dispersed but are more or less agglomerated. The degree of agglomeration and the strength of the agglomerates, which can be modified by surface treatments, have a very great effect on the dynamic mechanical properties. Filler agglomerates which ar…
Fe-B and Fe-P amorphous alloys exhibit Invar characteristics in a wide temperature range below the Curie temperature, as well as a large high-field susceptibility and a pronounced forced volume magnetostriction. It should be noted that magnetic moment per Fe atom of these alloys does not increase monotonically with de…
Electrochemical processes involving gaseous reactants can be carried out in fixed bed electrodes with co‐current downward flow of gas and electrolyte solution. Bench scale experiments with the electroreduction of oxygen, the electroreduction of sulfur dioxide, and the electrowinning of copper in such "trickle bed" ele…
The peculiar magnetic properties of the ferromagnetic compound ThCo5 have been studied by means of polarized neutrons. The first order magnetic transition, induced below 150 K by an applied field corresponds to an increase of the magnetization of the two Co sites (2c, 3g). The thermal variations of the spontaneous mag…
Temperature dependence of the lattice parameters of magnetite in cubic and monoclinic phases were measured accurately between 80 K and 295 K by means of single crystal X-ray diffraction. It was shown that the monoclinic distortion of the lattice in the low temperature phase has a tendency to become large with the lowe…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPreparation, spectroscopic properties, and crystal structures of Te6(AsF6)4.2AsF3 and Te6(AsF6)4.2SO2: a new trigonal-prismatic cluster cation, hexatellurium(4+)Robert C. Burns, Ronald J. Gillespie, Woon-Chung Luk, and David R. SlimCite this: Inorg. Chem. 1979, 18, 11, 3086–…
The elementary phenomenon involved in flashover of high voltage insulators is the propagation of a discharge at the surface of an electrolyte. The study reveals two requirements: 1-Electrical conditions (applied voltage and discharge current) have to be fulfilled so that the discharge can be sustained by the power sou…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHomogeneous carbon monoxide hydrogenation on multiple sites: a dissociative pathway to oxygenatesJohn S. Bradley, G. B. Ansell, and E. W. HillCite this: J. Am. Chem. Soc. 1979, 101, 24, 7417–7419Publication Date (Print):November 1, 1979Publication History Published online1 M…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhotoresponsive Polymers. Reversible Solution Viscosity Change of Poly(methyl methacrylate) Having Spirobenzopyran Side GroupsMasahiro Irie, Akira Menju, and Koichiro HayashiCite this: Macromolecules 1979, 12, 6, 1176–1180Publication Date (Print):November 1, 1979Publication…
Abstract A series of Polyether‐based thermoplastic polyurethanes, varying in hard‐segment content between 20 and 80 wt. %, was prepared using an (oxypropylene‐oxyethylene) diol of M n = 2000 as the soft segment and 4,4′‐diphenylmethane diisocyanate extended with 1,4‐butanediol as the hard segment. Physical‐mechanical,…
Crystalline acetylene at 141 K is cubic, a = 6.091 (3) /~, space group Pa3, Z = 4. The intensities of all 164 independent reflexions up to sin 0/2 = 0.80 A -1 were measured accurately on a Nonius four-circle diffractometer. For higher sin 0/2, very few significant reflexion intensities exist due to the strong thermal…
Measurements of 3He released by thermal desorption have been made in high-purity annealed, cold-worked, and single-crystal nickel samples. The 3He was introduced by natural tritium decay to eliminate implantation produced defects. Release was observed in the temperature region from ∼100 to 300 K and above 800 K; no de…