Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTChemical Industry Medal. Development of NylonE. K. BoltonCite this: Ind. Eng. Chem. 1942, 34, 1, 53–58Publication Date (Print):January 1, 1942Publication History Published online1 May 2002Published inissue 1 January 1942https://pubs.acs.org/doi/10.1021/ie50385a011https://doi…
E. H. Farmer, G. F. Bloomfield, A. Sundralingam and D. A. Sutton, Trans. Faraday Soc., 1942, 38, 348 DOI: 10.1039/TF9423800348
Previous experiments have shown that in annealed polycrystalline specimens, the grain boundaries are much more susceptible to plastic shear than are the interiors of the grains. This paper investigates the elastic properties of a specimen in which the grain boundaries are incapable of supporting shearing stresses. In…
Colorimetric methods are uscd to study the carbohydrate in preparations of collagen made from hide, tendon, and bone. It was found that the three preparations all contain the same amount of the same kind of carbohydrate. This result confirms the indication of other experiments, namely, that the white fibrous connectiv…
The initial rate of the reaction between CO and NO2 from 225°C to 290°C was measured under conditions which precluded the possibility of NO2 decomposition. This study extends the earlier data on the reaction over a 300° temperature interval. The oxidation of nitric oxide at 25°C and at pressures from 0.01 to 0.1 mm of…
A method of study found applicable to the clay minerals clarifies the chemical relations of glauconite and celadonite, and gives significant information about their genesis. The representative formula of glauconite is: (K, Ca 1/2 , Na) . 84 (Al . 47 Fe... . 97 Fe.. . 19 Mg .40 ) (Si 3.65 Al . 35 )O 10 (OH) 2 and of ce…
THIS chapter presents theories of liquid viscosity, particularly those of van der Waals, Andrade, Prandtl, and Eyring. Whereas the viscosity of gases is based on the collisions of molecules, that of liquids is dominated chiefly by molecular attraction forces. Experimental material is presented on the effect of chemica…
A refractometer capable of giving refractive indices and dispersions to one unit in the fifth decimal place is described. The samples are smooth ground, but not polished, and require little care in preparation. A complete determination (Na D, C and F lines) can be made in 1-2 hr. This compares very favourably with the…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Molecular Structures of the Dimers of Aluminum Dimethyl Chloride, Aluminum Dimethyl Bromide, and Aluminum Trimethyl and of HexamethyldisilaneL. O. Brockway and N. R. DavidsonCite this: J. Am. Chem. Soc. 1941, 63, 12, 3287–3297Publication Date (Print):December 1, 1941Publ…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTVapor Phase Thermal Isomerization of α- and β-Pinene*L. A. Goldblatt and S. PalkinCite this: J. Am. Chem. Soc. 1941, 63, 12, 3517–3522Publication Date (Print):December 1, 1941Publication History Published online1 May 2002Published inissue 1 December 1941https://pubs.acs.org/…
In this paper I shall give a solution of the decision problem for the Lewis systems S2 and S4; i.e., I shall establish a constructive method for deciding whether an arbitrary given sentence of one of these systems is provable. The method is laborious to apply, since, in order to decide by means of it whether a given s…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Thermal Properties of Crystalline and Glassy Boron Trioxide1J. C. SouthardCite this: J. Am. Chem. Soc. 1941, 63, 11, 3147–3150Publication Date (Print):November 1, 1941Publication History Published online1 May 2002Published inissue 1 November 1941https://pubs.acs.org/doi/…
The aldehyde content of hydro cellulose may be readily estimated by titration with iodine in alkaline solution. Investigation of the rate of oxidation of hydrocellulose by iodine at 0 C and pH 10.6 showed that there is an initial rapid reaction in the first hour accompanied by a side reaction. This latter reaction con…
A bstract Phosphorus pentoxide, which was used first to improve the color of heavy flint glasses, was later recognized as a valuable constituent of optical glasses, and the excellent ultraviolet transmission and low softening points of phosphate glasses have been found recently. Glasses that have a high content of P 2…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMolecular Size Distribution in Three Dimensional Polymers. I. Gelation1Paul J. FloryCite this: J. Am. Chem. Soc. 1941, 63, 11, 3083–3090Publication Date (Print):November 1, 1941Publication History Published online1 May 2002Published inissue 1 November 1941https://pubs.acs.or…
The codeposition of two or more metals so as to form a coat of alloy is an old art, but a new science. Twenty‐five years ago two alloys were being plated on steel; today a wide variety of different alloys are commercially plated on a half dozen basis metals. Applications of alloy plating include decorative and protect…
Brass is plated for the purpose of obtaining rubber adhesion and for ornamental purposes. A brass bath containing <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline" id="ML1" overflow="scroll"> <mml:mi mathvariant="normal">CuCN</mml:mi> </mml:math> , 26.2 g./L.; <mml:math xmlns:mml="http://www.w3…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructure and Absorption Spectra. II. 3-Acetoxy-Δ5-(6)-nor-cholestene-7-carboxylic AcidR. B. Woodward and A. F. CliffordCite this: J. Am. Chem. Soc. 1941, 63, 10, 2727–2729Publication Date (Print):October 1, 1941Publication History Published online1 May 2002Published inissue…
Aufstellung des Zustandsschaubildes des Systems Eisen‐Eisensulfid‐Kalziumsulfid durch thermische und Gefügeuntersuchungen.
THE use of dielectric loss and power factor for testing the insulation of electrical equipment in service position in the field with one side grounded began with the advent of the apparatus and method described in this paper. Through its use, tables of standard values have been set up indicating when insulation is “go…