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The Thermodynamics of High Polymer Solutions. V. Phase Equilibria in the Ternary System: Polymer 1—Polymer 2—Solvent

Robert L. Scott1949-03-01OpenAlex

A thermodynamic analysis of phase equilibria similar to that developed in Part IV when applied to the ternary system of two polymers and a solvent leads to an explanation of the usual incompatibility of different high polymers in solution. Unless their heat of mixing is virtually zero or negative, two high polymers ar…

Phase Equilibria and ThermodynamicsPolymer Nanocomposites and PropertiesAdsorption, diffusion, and thermodynamic properties of materials

Expansion effects of annealing borosilicate thermometer glasses

A. Q. Tool、J.B. Saunders1949-02-01Journal of research of the National Bureau of Standards

The expansivity of many glasses can be increased almost 10 percent by increasing the equilibrium temperature fr om 150 to 200 deg C above t he lowest such temperat ure attainable by lo ng annealing treatments in t he lower part of t h e annealing range. By ch an gi ng t he equilibrium temperatures of a number of the b…

Glass properties and applicationsPigment Synthesis and Properties

Solubility of Progesterone in Water and in Saline.

Arthur L. Haskins1949-02-01Experimental Biology and Medicine

The solubility of crystalline progesterone in aqueous media was determined spectrographically. Progesterone was found to have an average solubility at room temperature of 16.8 μg per ml in distilled water and 15.1 μg per ml in 0.9% aqueous saline.

Chemical and Physical Properties in Aqueous SolutionsCrystallization and Solubility Studies

Aberration Correction with Electron Mirrors

E. G. Ramberg1949-02-01Journal of Applied Physics

Both the spherical and the chromatic aberration of electron microscope objectives may, in principle, be corrected with the aid of a uniform retarding field acting as a mirror. Such an arrangement has the drawback of requiring a conducting film in the ray path and the insertion of the specimen in a region of high field…

Advancements in Photolithography TechniquesAdvanced Electron Microscopy Techniques and ApplicationsElectron and X-Ray Spectroscopy Techniques

XIV. On the oxidation of metals at low temperatures and the influence of light

N. Cabrera1949-02-01The London Edinburgh and Dublin Philosophical Magazine and Journal of Science

Summary The theory of Molt ( 1940, 1947) for the oxidation of metals at low temperatures has been discussed and extended to oxides, such as Cu20, for which the metal diffuses through the oxide by the mechanism of vacant lattice points. It is also proved that the logarithmic law will be valid down to very low temperatu…

Metallurgical Processes and ThermodynamicsLaser-induced spectroscopy and plasmaElectron and X-Ray Spectroscopy Techniques

The system BaO-B2O3

Ernest M. Levin、Howard F. McMurdie1949-02-01Journal of research of the National Bureau of Standards

A phase equilibrium diagram of the system BaO-B20 3 has been constructed fr om data obtained essentiall y by the quenching method. Four congruently m elting compounds were identifi ed: BaOAB20 3, melting at 879 5 C; BaO.2B20 3, melting at 900 5 C; BaO.B20 3, melting at 1,095 5 C; and 3BaO.B20 3, melting at 1,383 5 C .…

Clay minerals and soil interactionsGlass properties and applicationsCrystal Structures and Properties

The Sodium Tungsten Bronzes. I. Chemical Properties and Structure

M. E. Straumanis1949-02-01Journal of the American Chemical Society

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Sodium Tungsten Bronzes. I. Chemical Properties and StructureM. E. StraumanisCite this: J. Am. Chem. Soc. 1949, 71, 2, 679–683Publication Date (Print):February 1, 1949Publication History Published online1 May 2002Published inissue 1 February 1949https://pubs.acs.org/doi/…

Advanced Materials Characterization TechniquesMetallurgical and Alloy ProcessesSurface and Thin Film Phenomena

Thermal degradation of polystyrene and polyethylene. Part III

H. H. G. Jellinek1949-02-01Journal of Polymer Science

Abstract An apparatus has been constructed which enables one to follow continuously the formation of monomer during degradation in vacuum. Experimental results are presented on the degradation of fractionated and unfractionated polystyrene over a range of temperatures from 340–400°C. in vacuum. A mechanism has been pr…

Polymer crystallization and propertiesPolymer Nanocomposites and PropertiesPolymer Science and PVC

Density and Packing in an Aggregate of Mixed Spheres

Douglas Rennie Hudson1949-02-01Journal of Applied Physics

It is shown that in close packing of spheres, two types of interstice exist, bounded by six and by four convex spherical surfaces. These are termed ``square'' and ``triangular.'' They are connected by a continuous labyrinth through which a ball not exceeding (2/√3−1)r in radius can be threaded. In both cubic and hexag…

Cellular and Composite StructuresAdditive Manufacturing and 3D Printing Technologiesbiodegradable polymer synthesis and properties

Calculation of stress in electrodeposits from the curvature of a plated strip

Abner Brenner、S. Senderoff1949-02-01Journal of research of the National Bureau of Standards

Formulas are derived for the calculation of stress in electrodeposits from the curvature developed in a plated strip. All the formulas are derived from the fundamentals of the theory of elasticity and the relationships among the various formulas are showll. Simplifi ed formulas are derived and their limits of applicab…

Smart Materials for ConstructionCorrosion Behavior and InhibitionAnodic Oxide Films and Nanostructures