摘要:

The results of viscosity measurements for mixtures of 1-propanol, 2-propanol, 3-amino-1-propanol and (±)i-amino-2-propanol with 1,4-dioxane at 20, 30 and 40°C are presented and comparatively discussed. From the temperature dependence of viscosity, activation energies are determined.

ISSN:0031-9104    

DOI:10.1080/00319109808032795

出版商:Taylor & Francis Group    

年代:1998

数据来源: Taylor

摘要:

Speeds of sound, densities and refractive indices of the binary mixtures containing acetone, methanol, ethanol, or 2-butanone have been measured at 298.15 K and atmospheric pressure, in the whole composition diagram, the derived excess values being determined. Parameters of analytical expressions which represent the composition dependences of excess and variation of properties are reported. Values of physical properties were compared with the results obtained by different prediction methods. The excess volumes were estimated using different applications of the Heller equation, which are depending on the refractive indices of the mixtures. A good agreement between the experimental and theoretical values both in magnitude and sign were obtained by these methods.

ISSN:0031-9104    

DOI:10.1080/00319109808032796

出版商:Taylor & Francis Group    

年代:1998

数据来源: Taylor

摘要:

Experimental solubilities are reported for anthracene dissolved in seven binary alkane+3-methoxy-1-butanol solvent mixtures at 25°C. The alkane cosolvents studied were hexane, heptane, octane, cyclohexane, methylcyclohexane, 2,2,4-trimethylpentane andtert-butylcyclohexane (also called (1,1-dimethylcyclohexane). Results of these measurements are used to test two mathematical representations based upon the combined Nearly Ideal Binary Solvent (NIBS)/Redlich-Kister and Modified Wilson equations. For the seven systems studied, both equations were found to provide an accurate mathematical representation of the experimental data, with an overall average absolute deviation between measured and calculated values being 0.6% and 0.9% for the Combined NIBS/Redlich-Kister and Modified Wilson equations, respectively.

ISSN:0031-9104    

DOI:10.1080/00319109808032797

出版商:Taylor & Francis Group    

年代:1998

数据来源: Taylor

摘要:

Some numerical considerations relating to the potential of mean force at the melting point of Rb metal are first presented, which argue against the existence of a well defined activation energy for the shear viscosity of this liquid.

ISSN:0031-9104    

DOI:10.1080/00319109808032798

出版商:Taylor & Francis Group    

年代:1998

数据来源: Taylor

摘要:

Vapor-liquid equilibrium at 94 kPa has been determined for the ternary system methyl 1,1 -dimethylethyl ether (MTBE)+heptane+octane. The system deviates positively from ideality and no azeotrope is present. The ternary activity coefficients and the boiling points of the system have been correlated with the composition using the Redlich-Kister, Wilson. NRTL, UNIQUAC, UNIFAC. and Wisniak-Tamir relations. Most of the models allow a very good prediction of the activity coefficients of the ternary system from those of the pertinent binary systems.

ISSN:0031-9104    

DOI:10.1080/00319109808032799

出版商:Taylor & Francis Group    

年代:1998

数据来源: Taylor

摘要:

Temperature dependence of the principal refractive indices (n0andne) of three nematic liquid crystals were measured using an Abbe refractometer with a large refractive index prism. The variation of the refractive index anisotropy in the nematic phase which reflects the variation of the orientational order parameter have been evaluated. The validity of. the Lorenz-Lorentz equation for the relation between polarizability of the molecules and the refractive index has been tested for the mesogenic molecules.

ISSN:0031-9104    

DOI:10.1080/00319109808032800

出版商:Taylor & Francis Group    

年代:1998

数据来源: Taylor

摘要:

Density and refractive indices for mixtures of acetonitryle with methanol were measured over the whole composition range at 298.15 K, as well as the relative permittivities at 288.15 K, 298.15 K and 308.15 K. From these data the excess molar volumes, apparent and partial molar volumes of acetonitryle and methanol, the excess relative permittivity, the temperature coefficients of relative permittivity and Kirkwood's correlation factor for investigated mixtures were calculated. The1H-NMR spectra of these liquid binary mixtures, were recorded at 298 K and the spectral parameters, ΔΔ(ACN-MeOH) were calculated.

ISSN:0031-9104    

DOI:10.1080/00319109808032801

出版商:Taylor & Francis Group    

年代:1998

数据来源: Taylor

摘要:

An approach to static and dynamic structure of Li-H plasma in different ionization states is set out, long wave properties being emphasized.

ISSN:0031-9104    

DOI:10.1080/00319109808032802

出版商:Taylor & Francis Group    

年代:1998

数据来源: Taylor

摘要:

This is a scanned image of the original Editorial Board page(s) for this issue.

ISSN:0031-9104    

DOI:10.1080/00319109808032794

出版商:Taylor & Francis Group    

年代:1998

数据来源: Taylor