Materials Literature
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The infrared and Raman spectra for phosphoryl chloride, thiophosphoryl chloride, and phosphoryl fluoride were collected and examined for the most probable values for the wave numbers, intensities, and depolarization factors. The data are as follows: The Raman displacements Δσ in cm—1, the relative intensities I, and t…
Abstract Complete conversion of the cellulose crystal lattice to that of the ethylenediamine‐cellulose complex can be attained with aqueous ethylenediamine solutions of 60% and greater. Cellulose in the form of loose cotton yarn or woven fabric immersed in 98% ethylenediamine solution for as little as 1 minute is as c…
The lowest-energy transition (n→π*) of the nitrate ion was found to shift in energy and intensity in a systematic way over the series of molten alkali nitrates from LiNO3 through CsNO3. The energy E of the band maximum varied in a linear way with the cationic radius. At 365°C (extrapolated for CsNO3) E in electron vol…
The mathematical expressions for the field intensities external to spheroids or an ellipsoid with uniform magnetization are given. They are useful in predicting fields external to (a) open-structure magnetic devices such as metallic or ferrite films, twistors or splinters, and (b) spheroidal and ellipsoidal samples wh…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMonosaccharide Sulfates. I. Glucose 6-Sulfate. Preparations, Characterization of the Crystalline Potassium Salt, and Kinetic Studies1KENNETH B. GUISELEY and PAUL M. RUOFFCite this: J. Org. Chem. 1961, 26, 4, 1248–1254Publication Date (Print):April 1, 1961Publication History…
A method for the determination of the fracture energy of brittle plastics is described. A crack is propagated down the length of a rectangular specimen under controlled conditions and the variation of crack opening with length determined. From these results the fracture energy may be calculated The method has been app…
Abstract The crosslinking efficiency of dicumyl peroxide was investigated with the use of 2,6‐dimethyl‐2,6‐octadiene as a model polyisoprene. High‐temperature gas chromatography was used to determine quantitatively the amount of crosslinked products as well as the decomposition products of the peroxide, α,α‐dimethylbe…
The paucity of information about the fine structure of cuticle cells, in animal hair and wool fibres, has been a major factor in the general failure to advance a theory capable of explaining quantitatively the origin of the Directional Frictional Effect.Electron microscope studies have been made covering : (i) surface…
Experimental and theoretical studies are described which clarify the nature and importance of the chemical and physical processes tha t occur in the ablation of these materials. Products and amount of gas from resin pyrolysis are determined from tube furnace tests, the rate of the process is inferred, heat effects are…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPressure-Volume-Temperature Properties of Sulfur Dioxide.T. L. Kang, L. J. Hirth, K. A. Kobe, and J. J. McKettaCite this: J. Chem. Eng. Data 1961, 6, 2, 220–226Publication Date (Print):April 1, 1961Publication History Published online1 May 2002Published inissue 1 April 1961h…
Abstract Two disiloxane benzimidazole polymers are described. These materials show increased solubility and lower softening points than the previously described fully aromatic benzimidazole polymers. The synthesis of the required disiloxane monomers is given.
The lattice model of a polymer molecule with excluded volume and nearest-neighbor forces arising from polymer-solvent interaction is investigated by exact numerical calculation for short chains of up to about ten links. Extrapolation to large values of n, the number of links, is shown to be justified and enables the m…
Abstract During the last thrity years, dielectric measurements have been employed extensively to provide a better understanding of the interactions between polymer and plasticizer in various thermoplastic formulations. Recently, a series of melamine resins, plasticized to the extent that shrinkage and internal stress…
Abstract Inconel 718 is an age-hardenable nickel-chromium alloy having exceptionally high tensile, yield, creep, and rupture strength at temperatures up to 1300 F. This datasheet provides information on composition, physical properties, elasticity, tensile properties, and compressive strength as well as fatigue. It al…
Abstract The photochemical isomerization of cis as well as trans-stilbene in n-hexane was studied kinetically in the temperature range 10∼30°C using the mercury lines of 313 and 334 mμ. Quantum yields were found to be 0.04 for the cis→trans, and 0.27 for the trans→cis conversion. Conversion rates for both directions o…
Using a silver – silver chloride reference electrode, the electrode potentials of the system U, UCl 3 (KCl, NaCl) and the redox potentials of the system Pt, UCl 3 , UCl 4 (KCl, NaCl) were measured at various concentrations of the uranium chlorides and at temperatures between 650 and 850 °C.From the results, the electr…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTHE HYDROGEN VIBRATIONS IN COBALT CARBONYL HYDRIDE. BONDING CONSIDERATIONS.1Walter F. Edgell and Robert SummittCite this: J. Am. Chem. Soc. 1961, 83, 7, 1772–1773Publication Date (Print):April 1, 1961Publication History Published online1 May 2002Published inissue 1 April 196…
Abstract The types of anode and cathode reactions commonly found in corrosion by aqueous media are described, and the combination of these reactions in corroding and in passivated systems is discussed. The principal ways in which corrosion rates are increased or decreased are classified and discussed, as follows: anod…
The thermoelectric parameters α, 1/ρ, and 1/(K−Ke) of oriented polycrystals increase as the freezing rate decreases and as the temperature gradient in the liquid at the interface increases. The effects are primarily attributed to the variation in the degree of microsegregation produced in the crystals as a function of…
The transmission and degree of polarization of a quarter-wave stack of non-absorbing films deposited on a transparent substrate is expressed in terms of two variables. One variable is a function only of the refractive indices of the layers, the incident medium, and substrate ; the other variable depends on the angle o…