Materials Literature
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An improvement is described in the automatic procedure for solving crystal structures incorporated in the computer program LSAM . The development of signs from an initial set containing symbols is carried only as far as is necessary to establish strong relationships between the symbols. The information so gained is us…
Abstract Mixing and processing methods used in the rubber industry have been designed to use the only form of raw rubber hitherto available—that of a high molecular weight solid. But rubber in high molecular weight form is essential only in the finished product; in principle, similar final properties could be obtained…
Il est bien connu que la présence de manganèse dans un alliage fer-azote conduit à une déformation marquée du pic de Snoek de l'azote. Cette modification du pic a deux conséquences importantes : - dans le dosage de l'azote interstitiel par la méthode du frottement intérieur, il est nécessaire de tenir compte de la mod…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTProtolysis kinetics of diamines in sulfuric acidDonald E. Leyden and J. M. McCall Jr.Cite this: J. Phys. Chem. 1971, 75, 15, 2400–2402Publication Date (Print):July 1, 1971Publication History Published online1 May 2002Published inissue 1 July 1971https://pubs.acs.org/doi/10.1…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and spectral characterization of .beta.-diketones containing perfluorophenyl and perfluoroalkyl groupsJames F. Engel and Cecil C. ChappelowCite this: J. Chem. Eng. Data 1971, 16, 3, 381–382Publication Date (Print):July 1, 1971Publication History Published online1 M…
Abstract The infra‐red spectrum of polyvinyl acetate has been studied from 4000 to 150 cm‐1 and a detailed assignment made. To assist with the assignments the partially deuterated polymer, poly‐α, α, β‐trideuterovinyl acetate, and a branched‐chain acetate have been synthesised and their spectra examined.
Abstract From the differential thermal and thermogravimetric analyses of potassium oxalate together with the X-ray diffraction studies, three crystallographic modifications of the anhydrous salt were found. When potassium oxalate monohydrate crystals were dehydrated at, e.g., 140°C, phase II, which is stable below 381…
Abstract The literature on polymer morphology contains many studies of structural and orientation changes occurring upon uniaxial stretching of films and fibers, but it has only an occasional reference to such studies on biaxially stretched film. This paper presents data on a structural change due to simultaneous biax…
The principles governing formation of superficial oxides on metal surfaces are surveyed. Oxide crystals grow on a metal surface by rearrangement and place exchange within metal-oxygen substructures arising from the accumulation of oxygen by adsorption processes. The rate-controlling steps for growth of films are discu…
Electrical conductivity and magneto resistance effect of Ni, Cu, Zn and metal free phthalocyanine single crystals were investigated. The electrical conductivity and the activation energy in phthalocyanine were expressed by following equations \begin{aligned} \sigma{=}Ne\mu_{D}\exp\left(\frac{\varDelta S}{2k}\right)\ex…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCorresponding states and the glass transition for alkali metal nitratesC. A. Angell and D. B. HelphreyCite this: J. Phys. Chem. 1971, 75, 15, 2306–2312Publication Date (Print):July 1, 1971Publication History Published online1 May 2002Published inissue 1 July 1971https://pubs…
The susceptibility of 18% Ni (250) maraging steel to stress corrosion cracking in 3.5% NaCl solution has been investigated. Metallographic and fractographic examinations show distinct differences between specimens broken under free corrosion conditions and those broken under hydrogen charging conditions. It is propose…
The sintering of uranium mononitride (UN) depends on temperature and the N 2 pressure maintained over the nitride during heat treatment. At a given temperature, an N 2 pressure that maintained the UN in the single‐phase region slightly above the phase boundary where the reaction UN→U+½N 2 (g) occurred was most effecti…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMutual solubilities of propylene carbonate and waterArthur G. Williamson and Neil F. CatherallCite this: J. Chem. Eng. Data 1971, 16, 3, 335–336Publication Date (Print):July 1, 1971Publication History Published online1 May 2002Published inissue 1 July 1971https://pubs.acs.or…
The Hall mobility, thermoelectric power, magnetoresistance and optical absorption coefficient of Mg x Pb 1− x Te alloys with 0less-than-or-eq, slant x less-than-or-eq, slant0·06 have been measured at temperatures within the range 77 to 450 K. It has been found that alloying PbTe with MgTe increases the direct energy g…
The Hall mobility and thermoelectric power of n- and p-type Cd x Pb 1− x Te alloys with x = 0·03, 0·06 and 0·11 have been measured at temperatures within the range 77 to 450 K for carrier concentrations within the range 10 16 to 10 20 cm −3 . The results have been interpreted using a two valence band model. The energy…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXT1,2-Dithiolene complexes of ruthenium and ironA. L. Balch and Joel MillerCite this: Inorg. Chem. 1971, 10, 7, 1410–1415Publication Date (Print):July 1, 1971Publication History Published online1 May 2002Published inissue 1 July 1971https://pubs.acs.org/doi/10.1021/ic50101a019…
To better determine the optical properties of the rare-earth oxysulfide phosphors and to lay the foundation for their application in single-crystal form as scintillators and lasers we have grown, for the first time, single crystals of these materials. A description of present growth techniques will be presented. Mater…
Th e refrac tiv e indi ces of a commercia l fu sed silica s pec im e n were de termin ed at ten wa ve len gth s from 404.7 to 667.8 nm over the tempe ra ture range from -200 to + 20 C. Th e data a re neede d for th e des ign o f optical sys te ms for s pace app lication s wh e re th e e xtrem es of te mpe rat ure are…
Polyethylene single crystals attached to a copper substrate were plastically deformed at −196°C and 20°C. Slip lines were observed at all temperatures on the surface of the crystals. The observations suggest that plastic deformation in polyethylene crystals may occur by crystallographic slip due to the movement of dis…