Showing papers in "Journal of Colloid Science in 1951"

TL;DR: In this paper, the authors extended the viscosity equation for an infinitely dilute suspension of spheres to apply to a suspension of finite concentration, and made use of a functional equation which must be satisfied if the final viscosities is independent of the sequence of stepwise additions of partial volume fractions of the spheres to the suspension.

TL;DR: In this paper, the rotational motion of single rigid spheres and cylinders suspended in a liquid subjected to a velocity gradient have been compared with Jeffery's theoretical equations for ellipsoids of revolution.

TL;DR: In this article, the authors considered the mixing of liquids of high viscosity using a continuous deformation and showed the advantage of using matrix methods in considering certain types of distribution problems.

TL;DR: In this paper, the sintering of synthetic latex particles takes place by the viscous flow of the polymer, the surface tension of the plastic furnishing the necessary shearing stress, and the tensile strength of the material under these conditions was used as an indication of the voids in the material, or θ.

TL;DR: In this paper, an extension of this method of separation in a manner analogous to two-dimensional paper chromatography is presented. But the authors do not consider the effect of electrical potential on the results.

TL;DR: In this article, the authors present an approximate equation for calculating maximum pressure in the mold during packing and an approximate treatment of sealing by "freezing" in the gate leads to a linear relationship between temperature and pressure at the sealing point.

TL;DR: In this article, the extended interionic attraction theory is applied to uncharged or slightly charged surfaces in equilibrium with electrolytic solution and the concentration distribution and forces between the particles are derived, and compared with the results that Langmuir obtained neglecting interionic forces.

TL;DR: In this paper, it was shown that the selectivity coefficient is determined by the ratio of the exchange ion activity coefficients in the resin phase, by differences in ionic volumes and by the thermodynamic osmotic pressure.

TL;DR: In this paper, the exponential flow equation is used to convert experimental observations in capillary and concentric cylinder viscometers to rate of shear and shearing stress values, and it is shown that the constants N and η′ of the exponential equation increase in a regular manner with concentration for both shearing and stress ranges up to a volume fraction of about 0.60.

TL;DR: In this article, the volume and composition of a number of cation-exchange resins, measured under various experimental conditions, have been described, and the swelling of resins having different degrees of cross-linking is described in terms of an osmotic model.

TL;DR: In this paper, a crystalline complex of a nonionic surface-active agent, calcium chloride, and water has been isolated, and it appears to coordinate with hydrated calcium ions both in solution and at solid interfaces.

TL;DR: In this article, the titration with alkali and solution viscosities in dioxane-water mixtures containing various concentrations of acid and salt have been made for the 1:1 copolymers of maleic acid with styrene and vinyl ethyl ether, respectively.

TL;DR: In this article, it was shown that the inertial mechanism definitely exists and plays an important role in the mechanical filtration of aerosols at lower particle radii than calculated by Albrecht and Langmuir.

TL;DR: Theoretical equations for secondary stresses in a shearing viscoelastic fluid were developed in this article, assuming that the elastic stresses developed by the continuous shear also relax continuously in accordance with Maxwell's relaxation theory of viscosity.

TL;DR: In this paper, isotherms have been determined at room temperature for adsorption on carbon black of alkylated and non-alkylated aromatic compounds in n-heptane and white mineral oil.

TL;DR: In this paper, a series of sulfonated polystyrene-divinyl-benzene cation-exchange resins is described, and diffusion coefficients are calculated, and the rate of uptake is correlated with both the ionic volume and the degree of cross-linking of the resin structure.

TL;DR: In this paper, the relationship between the mobility of amino acids migrating on paper under the influence of an electric field, and the pH of the solution, the ionic strength, the time and the voltage across the paper are presented.

TL;DR: In this paper, a connected explanation for all the different observations has been formulated by the assumption of the existence of flexible chain molecules in solutions of gum arabate and arabic acid.

TL;DR: In this paper, a linear function of the reciprocal absolute temperature within a limited temperature range is used to measure the viscosity of polyvinyl acetate solvents, and the calculated heat of activation increases linearly with concentration and it increases slightly with molecular weight.

TL;DR: The rate of surface tension lowering for 0.005 N dodecyl sulfate, a surfactant which does not hydrolyze, is independent of pH as mentioned in this paper, which is a surface active agent.

TL;DR: In this article, the authors presented absorption spectra for solutions of dodecyl pyridinium iodide in water, ethanol, and chloroform (containing 0.7% ethanol) and showed that the change of absorption spectrum with concentration in water can be related to the critical micelle concentration of these salts.

TL;DR: In this paper, it was shown that at least 3% of the volume of solid bubble-free bulk polystyrene at room temperature consists of cavities and that the specific volume of bulk polystructure at room-temperature would be nearly the same as that of polystructures dissolved in a good solvent if the apparent second-order transition could be avoided for the former.

TL;DR: In this paper, the model biological cell of Nirenstein was shown to operate by solubilization of dyes in oil, and the effect of a single agent, at different concentrations, on the solubiliization of three different dyes was observed.

TL;DR: In this paper, a dispersion of iron globules in a nonaqueous vehicle showed only little particle agglomeration, but when placed in a magnetic field, the particles showed strong agglombating tendencies, leading to the formation of linear particle chains.