Materials Literature
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Polybenzimidazole (PBI) is the only textile fiber, either commercial or developmental, which under normal conditions is nonflammable in air, emits little or no smoke, and produces virtually no toxic offgases up to a temperature of 560°C. PBI also has the textile processing properties of polyester, and garments made fr…
Abstract A new EPR spectrum of V 2 O 5 is reported which is related to the non‐stoichiometry of the crystals. Its intensity increases on reduction and decreases on reoxidation. The spectrum is labelled El. El can be described by an S = 1 spin Hamiltonian with parameters g x = 1.33, g y = 2.51, g z = 1.01 ( y ‖ b , x a…
Summary The high-temperature transformation of andalusite (Al 2 SiO 5 ) into 3/2-mullite ( 3 A 2 O 3 2SiO 2 ) plus vitreous silica (SiO 2 ) has been studied within the temperature interval from 1300 to 1600 °C by means of X-ray powder and single-crystal techniques and by infrared spectroscopy. Results are interpreted…
The well known breakdown theories, Townsend's generation mechanism and the streamer mechanism, are reviewed and applied to the results of breakdown in the strongly electronegative gas, sulphur-hexafluoride. Experimental results reported in the literature on the breakdown behavior of sulphur-hexafluoride are examined i…
La conformation et l'ordre dans les solutions de polyélectrolytes sont étudiés d'abord pour une chaîne isolée puis pour plusieurs chaînes chargées enchevêtrées correspondant au régime semi-dilué. L'effet de changement de conformation dû à une variation de la densité de charge sur le polyion et à l'écran électrostatiqu…
The crimped structure of wool fibres is generally associated with a bilateral arrangement of ortho- and paracortical cells. The most obvious difference between these cell types is in the arrangement and relative proportions of microfibril and matrix proteins that constitute the fibre cortex. In the low-crimp fibres ex…
The paper considers the elastostatic axisymmetric problem for a long thick-walled cylinder containing a ring-shaped internal or edge crack. Using the standard transform technique the problem is formulated in terms of an integral equation which has a simple Cauchy kernel for the internal crack and a generalized Cauchy…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTParametric and Durability Studies of NOx Reduction with NH3 on V2O5 CatalystsGeorge L. Bauerle, S. C. Wu, and Ken NobeCite this: Ind. Eng. Chem. Prod. Res. Dev. 1978, 17, 2, 117–122Publication Date (Print):June 1, 1978Publication History Published online1 May 2002Published i…
The anodization of evaporated aluminum/copper alloy films has been investigated using Rutherford backscattering. It has been shown that the copper, initially distributed uniformly through the aluminum film, is not incorporated in the anodic oxide but accumulated at the metal oxide interface. At high potentials this in…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSelenium substitution in [Fe4S4(SR)4]2-: synthesis and comparative properties of [Fe4X4(YC6H5)4]2- (X, Y = sulfur, selenium) and the structure of [(CH3)4N]2[Fe4Se4(SC6H5)4]M. A. Bobrik, E. J. Laskowski, Richard W. Johnson, W. O. Gillum, J. M. Berg, Keith O. Hodgson, and R. H…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTInteraction between orthogonal magnetic orbitals in a copper(II)-oxovanadium(II) heterobinuclear complexO. Kahn, P. Tola, J. Galy, and H. CoudanneCite this: J. Am. Chem. Soc. 1978, 100, 12, 3931–3933Publication Date (Print):June 1, 1978Publication History Published online1 M…
ADVERTISEMENT RETURN TO ISSUEPREVArticleChemistry of multilayered cyclophanesSoichi Misumi and Tetsuo OtsuboCite this: Acc. Chem. Res. 1978, 11, 6, 251–256Publication Date (Print):June 1, 1978Publication History Published online1 May 2002Published inissue 1 June 1978https://pubs.acs.org/doi/10.1021/ar50126a005https://…
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A series of Heusler alloys, with composition Ni 2 Mn(Mn x Sn 1−x ) has been studied. X-Ray and neutron diffraction techniques have been used to investigate the chemical order. Well-ordered alloys were prepared with compositions corresponding to x = 0.1. 0.2, 0.3, and 0.4. The magnetic properties of these ordered alloy…
The single-crystal elastic constants of tetragonal Al2Cu have been measured over the temperature range 4.2–300 K by the pulse-echo-overlap technique. The directly measured constants show a normal monotonic decrease in magnitude with increasing temperature but with C44 showing the least change. The anisotropy ratios C3…
The complex dielectric constants parallel and normal to the optical axis in ice Ih single crystal were measured in a wide range of the temperature (0°∼-150°C). T h e s t a t i c d i e l e c t r i c c o n s t a n t o f t h e D e b y e c o m p o n e n t a t e a c h t e m p e r a t u r e w a s o b t a i n e d b y e x t r…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTInvestigations of antigorite and nickel supported catalysts by x-ray photoelectron spectroscopyJacques C. Vedrine, Guy Hollinger, and Tran Minh DucCite this: J. Phys. Chem. 1978, 82, 13, 1515–1520Publication Date (Print):June 1, 1978Publication History Published online1 May…
Abstract The glass transition temperature T g of nylon 6 decreases monotonically toward a finite value T gl upon increase of the moisture content. The mechanism of this decrease entails the reversible replacement of intercaternary hydrogen bonds in the accessible regions of the polyamide. The limiting glass transition…
Anodic iron dissolution in acidic chloride solutions (constant ionic strength of 4.5M) over a wide range of H + and Cl − concentrations has been investigated. Anodic dissolution in low [H + ]‐concentrated chloride solutions is accelerated by both Cl − and OH − with Tafel slopes of 0.075 V/decade at low polarization an…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFormation of superoxide ion during the decomposition of hydrogen peroxide on supported metal oxidesNobumasa Kitajima, Shunichi Fukuzumi, and Yoshio OnoCite this: J. Phys. Chem. 1978, 82, 13, 1505–1509Publication Date (Print):June 1, 1978Publication History Published online1…