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The following article is a condensed report of studies conducted by re search associates of the Textile Foun dation, working at the National Bureau of Standards, Washington, D. C. The complete report appears in the current (May) issue of Journal of Research published by the Bureau.
The methods of determining object thickness in electron microscopy are briefly reviewed. Uncertainties in interpretation of surface replicas from a consideration of intensities alone are discussed and three different replicas of etch figures in pure aluminum are presented. The stereoscopic method is analyzed and an eq…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFoam Stability of Solutions of Soaps of Pure Fatty Acids.Gilbert D. Miles and John RossCite this: J. Phys. Chem. 1944, 48, 5, 280–290Publication Date (Print):May 1, 1944Publication History Published online1 May 2002Published inissue 1 May 1944https://doi.org/10.1021/j150437a…
Thermal and electrical conductivities of graphite and carbon were measured at various temperatures in the range between −191°C and 100°C. Thermal conductivity of graphite was found to increase at an increasing rate as the temperature was lowered and two values were always found for Acheson graphite, a longitudinal and…
Broadening of the Debye-Scherrer lines in x-ray photographs of cold-worked metals has been attributed (i) to breaking up of the crystals into " crystallites " whose linear dimensions are less, similar10 -5 cm., (ii) to the presence of crystal grains of different lattice parameters, and (iii) to distortion of comparati…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation W. H. Stockmayer; The Steady‐State Approximation in Polymerization Kinetics. J. Chem. Phys. 1 Apr…
Experimental values of second-order transition temperatures Tm and of cubical expansion coefficients below and above this temperature are presented for several new materials, notably saran. The thermal expansion behavior of two-component systems of incompatible materials (polystyrene plus polyolefins) has been studied…
The nature of hysteresis in products such as pneumatic tires, solid tires, and transmission belts is analyzed and the requirements of a laboratory test for evaluating the relative hysteretic characteristics of natural and synthetic rubber stocks are developed. The significance of various definitions of the ``hysteresi…
Measurements of stress decay as a function of time made at constant elongation on thin bands of gum and tread type natural rubber (Hevea), Neoprene, Butyl, Buna S, and Butaprene N stocks indicate that both secondary and primary bond relaxation occur. Practically complete relaxation is observed to take place in the exp…
The manufacture of synthetic rubber involves several chemical compounds which are toxic to man. A summary of the health hazards involved in the manufacturing process is warranted, as great quantities of synthetic material are being made. This paper deals with experiences encountered in the manufacture of certain types…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLactic Acid Condensation PolymersE. M. Filachione and C. H. FisherCite this: Ind. Eng. Chem. 1944, 36, 3, 223–228Publication Date (Print):March 1, 1944Publication History Published online1 May 2002Published inissue 1 March 1944https://pubs.acs.org/doi/10.1021/ie50411a009http…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThermal Expansion Properties of Plastic MaterialsR. F. Clash Jr. and L. M. RynkiewiczCite this: Ind. Eng. Chem. 1944, 36, 3, 279–282Publication Date (Print):March 1, 1944Publication History Published online1 May 2002Published inissue 1 March 1944https://pubs.acs.org/doi/10.1…
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W. H. Davies and M. A. T. Rogers, J. Chem. Soc., 1944, 126 DOI: 10.1039/JR9440000126
S. J. Barnett, New Researches on Magnetization by Rotation and the Gyromagnetic Ratios of Ferromagnetic Substances, Proceedings of the American Academy of Arts and Sciences, Vol. 75, No. 5 (Aug., 1944), pp. 109-129
Abstract NaBiS 2 and KBiS 2 both have the NaCl structure with Bi 3+ and Na + (resp. K + ) in averaged structure. The cell dimensions are 5.76 Å for NaBiS 2 and 6.01 Å for KBiS 2 . The ionic radius of Bi 3+ is discussed.
The solubility of silica glass in water has been determined through the temperature range 200 degrees C. to 420 degrees C. at a pressure of 300 atmospheres. Some previous investigations of solubility of silica in water, it is believed, have indicated a too great solubility as a result of failure to distinguish true so…
Abstract After some remarks on the importance of phenol formaldehyde resins as vulcanizing agents for rubber, the introductory investigations which led to the methylene quinone theory of the vulcanization are described. Finally this theory is illustrated with the compound 2.6‐di‐bromomethyl‐4‐methylphenol as an exampl…
Abstract Referring to the preceding article describing the methylene quinone theory of the vulcanization of rubber with phenol formaldehyde derivatives, in this paper the arguments in favour of that theory are considered in detail. The results of the investigations in question can be summarized as follows. The vulcani…