Materials Literature
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Abstract Differential thermal analysis and thermogravimetric analysis were used to evaluate the thermal properties of several types of polyurethane elastomers. The composition of the polymers investigated was changed by varying the substrate, or soft segment, diisocyanate and extender. The data indicated that within t…
R. L. Moss and D. H. Thomas, Trans. Faraday Soc., 1964, 60, 1110 DOI: 10.1039/TF9646001110
The heating effect of an electron beam, under the assumption that the entire beam energy is imparted to the target surface (disc heating model), can be calculated fairly readily. At the high voltages and small beam diameters employed in electron-beam machining, however, the problem is complicated by penetration of ele…
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Abstract Much past confusion has originated from attempts to describe the complete optical properties of a plastic in terms of a few ill‐defined parameters. Simple light‐scattering theory and studies of morphology have been combined in this article to suggest the causes of polymer opacity; methods cited for the improv…
L. D. Burke, F. A. Lewis and C. Kemball, Trans. Faraday Soc., 1964, 60, 919 DOI: 10.1039/TF9646000919
U. Eisner and M. J. C. Harding, J. Chem. Soc., 1964, 4089 DOI: 10.1039/JR9640004089
The geometrical properties of 2-bar full-set fabrics are considered in terms of two models; one in which there is a great deal of friction, so that parts of the structure are isolated from each other, and one in which this friction can be neglected. Il is shown that the model with the frictional restraint appears to p…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTApplication of Flash-Desorption Method to Catalyst Studies. IV. Adsorption of Ammonia on Alumina and Its Effect on Adsorption of Ethylene1Y. Amenomiya, J. H. B. Chenier, and R. J. CvetanovićCite this: J. Phys. Chem. 1964, 68, 1, 52–57Publication Date (Print):January 1, 1964P…
J. W. Dodd and N. S. Hush, J. Chem. Soc., 1964, 4607 DOI: 10.1039/JR9640004607
The elastic constants of a (73.8% Ni-26.2% Fe) ferromagnetic alloy have been measured at 300°K with the following results: C11=23.04, C12=14.44, and C44=11.92 (in units of 1011 dyn cm−2). These results are compared with previously reported work on pure Ni and a (30% Ni-70% Fe) alloy.
A low‐pressure gas plasma of oxygen ions has been used as the electrolyte for anodizing evaporated aluminum films on glass substrates. The oxide film grows at 22Aå/v at low voltages, while above 50v, the growth rate is somewhat less. Films have been anodized up to 90v. Capacitors formed of such plasma anodized aluminu…
L. Bass, Trans. Faraday Soc., 1964, 60, 1656 DOI: 10.1039/TF9646001656
Abstract In den Samen von Antiaris toxicaria L ESCH . liessen sich nach fermentativem Abbau mit den sameneigenen Fermenten 34 Cardenolide nachweisen. 16 konnten nach chromatographischen Trennungeii in Kristallen isoliert werden. Von diesen liessen sich 10 mit bekannten Cardenoliden identifizieren, 6 waren neu. Ihre St…
The process for the growth of silicon single crystals by the hydrogen reduction of silicon tetrachloride has been described using a model which assumes that chemical equilibrium obtains at the silicon deposition site. The thermodynamic calculations by Lever for the equilibrium gas phase composition in the Si‐Cl‐H syst…
Abstract The proposition that hydrolysis may account for the selective adsorption of heavy metals by clay surfaces is compared with an alternate explanation of specific exchange of the metal with weakly dissociable H + . It is shown that past evidence offered in support of the two hypotheses is somewhat ambiguous. The…
Abstract Polycarbonate auf der Basis 4,4′‐Dioxy‐diphenyl‐2,2‐propan, 4,4′‐Dioxy‐diphenylmethan und 4,4′‐Dioxy‐diphenyl‐sulfid kristallisieren mit athermischer Keimbildung aus der Schmelze sphärolithisch. Es wurden verschiedene morphologische Strukturen beobachtet. Die lichtmikroskopische Bestimmung der Sphärolith‐Wach…
SummaryExperiments investigating a novel method of preparing composite coatings are described. In this method, the dispersed phase, which may be fibrous or granular, is incorporated into a metallic matrix by suspending the fibres or particles in a plating bath suitable for electroplating the matrix material. Provided…
P. W. M. Jacobs and A. R. T. Kureishy, J. Chem. Soc., 1964, 4718 DOI: 10.1039/JR9640004718
The present investigation describes the successful modification of the surface properties of polymeric solids by the adsorption of appropriate partially fluorinated compounds at polymer-air interfaces during the formation of the polymer surfaces. The extent of additive adsorption was found to be dependent upon the mol…