Densities and viscosities of trialkyl borates

Abstract

The temperature-dependence of density and absolute viscosity has been established for the following trialkyl borates: methyl, ethyl, propyl, isopropyl, butyl, and isobutyl. Experimental densities were fitted into the equation, p = a + b(t -25) + c(t -25)2 + d(t -25

Surface tensions of trialkyl borates

“…The plot of surface tension vs. temperature showed the expected general increase in y with molecular weight for the unbranched homologs and correspondingly lower 7's for the branched isomers (those of the isopropyl compound being even lower than observations for methyl and ethyl borates). The abnormal amount of curvature shown by the ethyl borate plot above 90°C would seem to confirm the suggestion of partial decomposition unique for this homolog (5); a similar anomaly was previously noted in the plot of density vs. temperature (3). where t = °C, and the constants a, b, c, and d were evaluated by polynomial regression analysis.…”

“…To provide systematic and extensive experimental measurements of several physicochemical properties for this class of compounds, two investigations have thus far been carried out on the following series of representative homologs: methyl, ethyl, propyl, isopropyl, butyl, and isobutyl borates. One of the studies gives the results of vapor pressure-temperature correlations (2), and the other reports the temperature dependence of density and absolute viscosity (3). The present work is concerned with the measurement of surface tensions and their correlation with temperature.…”

“…The free volume so calculated can be utilized to 1 To whom correspondence should be addressed. explain the behavior of liquids and solutions in various ways (3)(4)(5)(6).…”

Liquid-liquid equilibria for three methyl alcohol-trimethyl borate-n-alkane systems

“…Measurements were made at atmospheric pressure and 298.15 ± 0.1 K. The titration method of analysis (7) for the binodal curve was used. Titrations were made Into a glass container which was Immersed in a constant temperature bath controlled to ±0.1 K. The container had three openings to accommodate a stirrer, which was used intermittently, a calcium chloride drying tube, and a buret.…”