630. The preparation and properties of some tetrakis(methylcyanide)copper(I) complexes
B. J. Hathaway, D. G. Holah and J. D. Postlethwaite, J. Chem. Soc., 1961, 3215 DOI: 10.1039/JR9610003215
Materials Literature
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THE FORMATION OF FIBRILS FROM COLLAGEN SOLUTIONS
The kinetics of collagen reprecipitation from solutions of salt-extracted calf dermis in the presence of small amounts of mucopolysaccharide and nucleic acids (0.005 per cent in the final reaction mixture) has been reported by Wood (1960). The present paper is a parallel study using the same materials, and describes t…
Cation Diffusion in Cr[sub 2]O[sub 3]
On employing a sectioning technique with Cr 51 as the tracer, the diffusion of Cr ions in nitrogen‐equilibrated was determined from 1045° to 1550°C. Volume diffusion coefficients in hot‐pressed compacts of three different impurity levels conform to the expression . Additions of and do not cause a significant change. U…
Elastic Constants of Single Crystals of the bcc Transition Elements V, Nb, and Ta
Values of the elastic constants of single crystals of the bcc transition elements V, Nb, and Ta, are reported at T=27°C. They are, in units of 1011 d/cm2: c11c12c44V22.811.94.26Nb24.613.42.87Ta26.716.18.25Comparisons are made of the values obtained for two crystals each of V and Ta. A high-frequency cw resonance techn…
Crystal Distortion in Copper Ferrite-Chromite Series
The cation distributions in copper ferrite-chromite series and the copper ferrite quenched from high temperatures are measured by X-ray diffraction method. The lattice parameters are also measured as a function of chromium ion content and of temperature. The critical fractions of copper ions on 16d and 8a sites for th…
On the determination of the crystalline fraction of isotactic polypropylene from x‐ray diffraction
Abstract A simple procedure for the determination of the crystalline fraction in isotactic polypropylene, suitable for routine work, is described. It gives lower figures for the crystalline fraction than the method recommended by N ATTA , C ORRADINI , and C ESARI in 1957. The correctness of the results (within the lim…
Preparative methods of polymer chemistry
Polymerization and the Characterization of Polymers.Preparation, Fabrication, and Characterization of Polymers.Advanced Processing.Polyamides, Ureas, Urethanes, and Other Amide--Linked Polymers.Polyesters, Polycarbonates, and Polyurethanes.High Temperature and High Performance Polymers.Solid Phase Polymerization.Ring-…
Lattice and Grain Boundary Diffusion in Polycrystals
Tracer diffusion mechanism in a polycrystalline medium with a plane source is discussed by assuming both the high diffusivity along the grain boundaries as compared with that inside the grains and the conservation of diffusant. The following theoretical results are obtained from the analytical solution of the problem.…
Transport Phenomena
Abstract not Available.
Subsolidus Phase Relations in the System CaCO3-MgCO3
The solid solubility, disorder, and decomposition relationships in the system CaCO3-MgCO3 were investigated in the pressure range of from 10 to 10,000 bars and at temperatures of from 700° to 1,200° C. A sealed-tube technique was used for the most part in an internally heated pressure vessel designed for rapid operati…
Metallic Corrosion Inhibitors
Abstract not Available.
Magnetic Properties of Fine Particles
Single domain ferromagnetic particles have a large coercive force. This character disappears at elevated temperature and the particles behave as if they are paramagnetic even at the temperature below the Curie point. The recent development in this field is reviewed.
The thermodynamics of frost damage to porous solids
D. H. Everett, Trans. Faraday Soc., 1961, 57, 1541 DOI: 10.1039/TF9615701541
Estimating Thermal Stability of Experimental Polymers by Empirical Thermogravimetric Analysis
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEstimating Thermal Stability of Experimental Polymers by Empirical Thermogravimetric AnalysisC. D. DoyleCite this: Anal. Chem. 1961, 33, 1, 77–79Publication Date (Print):January 1, 1961Publication History Published online1 May 2002Published inissue 1 January 1961https://pubs…
Influence of dislocations on diffusion kinetics in solids with particular reference to the alkali halides
The first page of this article is displayed as the abstract.
The Corrosion and Oxidation of Metals
Abstract not Available.
Free-Volume Model of the Amorphous Phase: Glass Transition
Free volume vf is defined as that part of the thermal expansion, or excess volume Δv̄ which can be redistributed without energy change. Assuming a Lennard-Jones potential function for a molecule within its cage in the condensed phase, it can be shown that at small Δv̄ considerable energy is required to redistribute th…
The polymerization of silicic acid obtained by the hydrothermal treatment of quartz and the solubility of amorphous silica.
The polymerization of silicic acid in the solution obtained by treating quartz with water at temperature 400℃ and under a specific volume of water 1.6ml/g was investigated from the changes in the concentration of molecular silica, the results were compared with those already reported, in which the silicic acid prepare…
Some Optical Properties of CdSe Single Crystals
Optical transmission and reflection measurements were made on a single crystal of CdSe (crystal class ${C}_{6v}$) with light polarized parallel and perpendicular to the $c$ axis. The absorption coefficients, ${\ensuremath{\mu}}_{\ensuremath{\perp}}$ and ${\ensuremath{\mu}}_{\mathrm{II}}$, were determined and are prese…
Neutron Diffraction Studies of Chromium-ModifiedMn2Sb
Existence of a ferrimagnetic to antiferromagnetic phase transition with decreasing temperature in Mn2Sb modified with 2.3 weight percent chromium is confirmed by neutron diffraction.Received 5 July 1960DOI:https://doi.org/10.1103/PhysRev.120.1969©1960 American Physical Society