Materials Literature
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The fluorescent response functions of NaI(Tl), CsI(Tl), CsI(Na) and CaF2(Eu) have been determined with thin crystals over the energy range from 3.3 keV to 840 keV. A pronounced nonlinear dependence on photon energy has been observed in this region for all four types of crystals investigated. Qualitatively the response…
Abstract Aus der Reihe der bisher unbekannten Poly‐ m ‐phenylene wurden Hexa‐ und Octa‐ m ‐phenylen aus entsprechenden Arylen‐dihalogeniden (z. B . 3.3′‐Dibrom‐biphenyl) durch Grignardierung und Umsetzung mit Kupfer(II)‐chlorid oder Kobalt(II)‐chlorid dargestellt. NMR‐, UV‐, IR‐Spektren und andere Eigenschaften dieser…
Abstract The “traditional” assumed structures of fibers, such as the fringed micelle and fringed fibril forms, regard the fiber as made up of a mixture of crystalline and noncrystalline regions. This view has been subject to considerable criticism in recent years, but it does, nevertheless, remain the most effective b…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEffect of substituents on the anisotropic electron spin resonance parameters in copper acetylacetonesHenry A. Kuska, Max Tofield Rogers, and R. E. DrullingerCite this: J. Phys. Chem. 1967, 71, 1, 109–114Publication Date (Print):January 1, 1967Publication History Published on…
Infrared spectra of surface films formed on iron and steel mirrors by propargyl alcohol, acetylene, and ethynyl‐cyclohexanol acid corrosion inhibitors were recorded using a multiple reflectance technique. These spectra showed that the acetylenic molecules reacted at the metal surfaces in solutions to produce protectiv…
Abstract A yield criterion is constructed for glassy polymers from results of constant strain‐rate tests in different stress fields. A significant effect of hydrostatic pressure (or volume change) on the yield stress of polystyrene was found. Direct dilatometric measurements were made on polystyrene, poly(methyl metha…
(1967). Integrated Intensities of Absorption Bands in Infrared Spectroscopy. Applied Spectroscopy Reviews: Vol. 1, No. 1, pp. 29-98.
Abstract Double oriented fiber spectra of syndiotactic polypropylene were obtained. It was possible to redetermine with greater accuracy the unit cell constants, which are: a = 14.50, b = 5.60, c = 7.40 A. Space group: C222 1 . It was proved that the chain has s (2/1)2 symmetry, corresponding to a succession of intern…
The spin-lattice relaxation of paramagnetic ions in ionic crystals takes place via thermal modulations of the complex consisting of the ion and its immediate neighbours. The standard theory is that due to Van Vleck, who used a crystal-field model to describe the complex. In recent years there have been extensive devel…
The EPR and optical spectra of vanadium in the Na2O–B2O3 glass system have been analyzed. It is found that the data can best be interpreted in terms of a vanadyl-type structure in a ligand field of fourfold symmetry. Good correlation of the optical and EPR data is achieved through molecular orbital calculations, which…
This paper deals with the algebraic classification of non-euclidean plane crystallographic groups (NEC groups, for short) with compact quotient space. The groups considered are the discrete groups of motions of the Lobatschewsky or hyperbolic plane, including those which contain orientation-reversing reflections and g…
The d‐c polarization technique according to Wagner was applied for the first time at elevated temperatures for the determination of σ ⊖ and σ ⊕ in the Zr 0.85 Ca 0.15 O 1.85 and Th 0.85 Y 0.15 O 1.925 electrolytes over a range of oxygen activity and temperature. The applicability of the technique and an improved metho…
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In semiconductors having high efficiency for radiative recombination, the voltage dependence of cathodoluminescence may be used to determine the diffusion length and to estimate the surface recombination velocity of excess carriers. Theoretical calculations are based on a knowledge of the Laplace transform of the dist…
Abstract Elastic moduli of the crystalline regions in high polymers have been studied. Oriented specimens were used throughout. Lattice strains were measured by an x‐ray technique in the direction of the fiber axis as well as in that perpendicular to the fiber axis. The moduli for both directions were calculated on th…
The kinetics of the reactions of various glasses with water and aqueous solutions with pH from 1 to 13 was studied. Simple binary alkali oxide‐silica glasses were examined as well as some ternary glasses derived from the binary compositions by substituting alkaline‐earth oxides for silica. All components of the glass…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXT5T2-1A1 Equilibriums in some iron(II)-bis(1,10-phenanthroline) complexesEdgar Koenig and K. MadejaCite this: Inorg. Chem. 1967, 6, 1, 48–55Publication Date (Print):January 1, 1967Publication History Published online1 May 2002Published inissue 1 January 1967https://pubs.acs.o…
Abstract Complex moduli of oriented specimens of polyethylene (PE), polypropylene (PP), polyoxymethylene, polyethylene oxide), and polytetrahydrofuran were measured in sheet form as a function of direction. The dynamic tensile modulus (E′) along the stretched direction (0° direction) was found to be lower than that pe…
Examination of benzotriazole-treated surfaces on copper, and the complexes produced when benzotriazole and analogous compounds react with cuprous and cupric ions in aqueous solution, has shown that the film produced on copper has a polymeric structure and is chemically bonded to the metal or metal-oxide surface Thickn…