Materials Literature
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The determination of the glass-transition pressure by the ruby R1 line-broadening method is quantitatively confirmed to within 10% by an independent method. The procedure utilizes a model which describes the pressure dependence of the viscosity and contains the glass-transition pressure as a parameter. The two methods…
The Air Force Primary Adhesively Bonded Structure Technology (PABST) Program was started in February 1975 for the purpose of validating the concept of adhesive bonding primary fuselage structural members together in lieu of the use of rivets. The goal of the Program was to provide a cost saving of 20 percent of the ac…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEffect of Chain Length Distribution on Elastomeric Properties. 2. Comparisons among Networks of Varying Degrees of RandomnessJ. R. Falender, G. S. Y. Yeh, and J. E. MarkCite this: Macromolecules 1979, 12, 6, 1207–1209Publication Date (Print):November 1, 1979Publication Histo…
Abstract Plasma polymers from some silyl amines were produced by the radio frequency of 13.56 MHz, and the surface properties were investigated. The polymers were revealed to be as hydrophobic as a plasma polymer from tetramethylsilane, which does not contain nitrogen. The hydrophobicity became effective at around 50…
The effect of temperature and steam pressure on the vaporization and corrosion of silica was studied by measuring weight loss as a function of time. The reaction rate increased exponentially with temperature up to 1200°, with a maximum rate of reaction at ∼1350°C. Above this temperature the rate abruptly decreased wit…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPreparation and crystal and molecular structure of dibromo(1,4,7-triazacyclononane)copper(II)Robert D. Bereman, Melvyn Rowen Churchill, Peter M. Schaber, and Marjorie E. WinklerCite this: Inorg. Chem. 1979, 18, 11, 3122–3125Publication Date (Print):November 1, 1979Publicatio…
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–…