FLUIDITIES AND CHANGES IN VOLUME OF THE BINARY SYSTEMS ISOPROPYL ALCOHOL-BENZENE AND ISOPROPYL ALCOHOL-WATER1

1938 ◽  
Vol 42 (2) ◽  
pp. 275-281 ◽  
Author(s):  
ALLEN L. OLSEN ◽  
E. ROGER WASHBURN
Keyword(s):  
Binary Systems ◽  
Isopropyl Alcohol ◽  
Alcohol Benzene

Equilibrium between Rubber and Alcohol-Benzene Solutions

1954 ◽  
Vol 27 (1) ◽  
pp. 165-174
Author(s):  
G. L. Starobinets ◽  
V. S. Komarov
Keyword(s):  
Crystalline Structure ◽  
Methyl Alcohol ◽  
Equilibrium Solution ◽  
Binary Systems ◽  
Saturated Vapor ◽  
Binary Solution ◽  
General Nature ◽  
Constant Composition ◽  
Degree Of Swelling ◽  
Alcohol Benzene

Abstract 1. The swelling in the gaseous phase at 20° C of a digested vulcanizate of natural rubber was studied through the entire range of compositions of the following binary systems: methyl alcohol-benzene, ethyl alcohol-benzene, n-propyl alcohol-benzene, n-butyl alcohol-benzene, and n-hexanol-benzene, and in a system of octadecanol-benzene at 60° V in the liquid phase. The swelling-composition curves show a maximum in the first three systems enumerated and a minimum in the latter system. 2. In the first five systems, the concentrations of the components of the equilibrium solution phase and the rubber phase were measured by means of an interferometer. 3. The coefficient of distribution of alcohol between the polymer and solution phases decreased from 1.6 in the methyl alcohol-benzene system to 0.3 in the n-hexanol-benzene system. The decrease of the coefficient of distribution of alcohol through the series of homologs is attributable to the dipolar character of the alcohol molecules. The coefficient of distribution of benzene between the two phases decreased from 16.6 in the methyl alcohol-benzene system to 6.3 in the n-hexanol-benzene system. This decrease of the coefficient of distribution of benzene is caused by the weakening of the quasi-crystalline structure in passing from methyl alcohol to the higher alcohols. 4. From an analysis of the distribution of alcohol between the solution and polymer, and also from a comparison of these curves with the curves of distribution of alcohol between the binary solution and its saturated vapor, it follows that rubber absorbs individual alcohol molecules, but not associates of them. 5. From a comparison of data on the distribution of the components of the binary solution between the polymer and equilibrium solution, and also from an analysis of the curves of partial free energy of the components of both phases, it follows that the general nature of the curves of isothermic equilibrium in the systems studied accords with the hypothesis of Konovalov; at the maximum points on the swelling curves, the composition of both phases is equal. The degree of swelling increases with increase of the concentration of the component in highest concentration in the polymer. 6. The existence of points of constant composition on the swelling curves is confirmed by measurements of the swelling by the volumetric method. Only for the compositions of solutions which correspond to the maximum points on the swelling curves, the volume in the condenser in whose vapors the specimen is suspended does not change with time. In more dilute solutions, the volume decreases ; in more concentrated solutions it increases, with time. 7. There is a close relation between the degree of swelling and the structure of a solution. The more pronounced the quasi-crystalline structure of the solution, the higher is the swelling-composition curve on the graph. The values of the degree of swelling and the Kirkwood-Anselm correlation parameter change in parallel for a given composition of the solution, in passing from one alcohol to another.

DETERMINATION OF DIELECTRIC CONSTANT IN BINARY ORGANIC SYSTEMS

1960 ◽  
Vol 38 (9) ◽  
pp. 1606-1616 ◽  
Author(s):  
C. G. Miller ◽  
O. Maass
Keyword(s):  
Binary Systems ◽  
Isopropyl Alcohol ◽  
Dielectric Constants ◽  
Empirical Equations ◽  
Absolute Accuracy ◽  
Accurate Data ◽  
Organic Systems ◽  
Benzene Toluene ◽  
Made In

Measurements of the dielectric constants of binary systems have been made; hexane, benzene, toluene, acetone, isopropyl alcohol, and nitrobenzene have been used two at a time. It was the purpose to obtain accurate data for the dielectric constants for the 15 systems over the whole range of concentrations from 0 to 100%, with the absolute accuracy of 0.1%. It is claimed that the relative accuracy is of this order. From the data obtained regularities have been found which are expressed in the form of empirical equations which summarize the data. Tentative suggestions regarding theoretical conclusions are made in a number of cases.

Rates of solvolysis of m-fluorobenzoyl chloride and m-trifluoromthylbenozyl chloride in isopropyl alcohol-benzene solutions. The cosolvent effect

1967 ◽  
Vol 71 (5) ◽  
pp. 1374-1381 ◽  
Author(s):  
Thomas F. Fagley ◽  
George A. Von Bodungen ◽  
James J. Rathmell ◽  
J. Douglas Hutchison
Keyword(s):  
Isopropyl Alcohol ◽  
Alcohol Benzene

scholarly journals Dielectric, Thermodynamic, and Computational Studies of Hydrogen Bonded Binary Mixtures of N-Methylaniline with Propan-1-ol and Isopropyl Alcohol

2013 ◽  
Vol 2013 ◽  
pp. 1-10 ◽  
Author(s):  
T. Vijaya Krishna ◽  
S. Sreehari Sastry ◽  
Sie Tiong Ha ◽  
V. R. K. Murthy
Keyword(s):  
Dipole Moment ◽  
Binary Systems ◽  
Isopropyl Alcohol ◽  
Helmholtz Free Energy ◽  
Impedance Analyzer ◽  
Inverse Relaxation Time ◽  
Excess Permittivity ◽  
Different Temperatures ◽  
Energy Excess ◽  
Excess Inverse Relaxation Time

The molecular interactions between the polar systems N-methylaniline with alcohols, propan-1-ol, and isopropyl alcohol for various mole fractions at different temperatures are studied by determining the dielectric permittivity using LF impedance analyzer, microwave bench, and Abbe's refractometer in radio, microwave, and optic frequency regions, respectively. Dipole moment, excess dipole moment, excess Helmholtz free energy, excess permittivity, excess inverse relaxation time, and excess thermodynamical values are calculated using experimental data. Hamiltonian quantum mechanical calculations are performed using PC Spartan and ArgusLab modeling softwares for both pure and equimolar binary systems of N-methyl aniline with alcohols.

Some Results of the Spectroscopic Study of Four Close Binary Systems of Early Spectral Types

1965 ◽  
Vol 5 ◽  
pp. 120-130
Author(s):  
T. S. Galkina
Keyword(s):  
Spectroscopic Study ◽  
Spectral Type ◽  
Spectroscopic Investigation ◽  
Binary Systems ◽  
Quantitative Information ◽  
Close Binary ◽  
Physical Parameters ◽  
Absorption And Emission ◽  
Close Binary Systems ◽  
Quantitative Estimates

It is necessary to have quantitative estimates of the intensity of lines (both absorption and emission) to obtain the physical parameters of the atmosphere of components.Some years ago at the Crimean observatory we began the spectroscopic investigation of close binary systems of the early spectral type with components WR, Of, O, B to try and obtain more quantitative information from the study of the spectra of the components.

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