1.000 mol/kg 臭化テトラアルキルアンモニウム (R_4NBr ; R=Me, Et, n-Pr, n-Bu)水溶液の密度と粘性率におよぼす温度・圧力効果(<小特集>高圧力小特集)

概要

論文の詳細を見る
The densities and the viscosities of aqueous solutions of 1.000 mol/kg tetraalkylammonium bromides (Me_4NBr, Et_4NBr, n-Pr_4NBr, and n-Bu_4NBr) were measured at 5.0, 10.0, 15.0, 25.0, 40.0, and 50.0℃ and at pressures up to 375 MPa. The viscosity minimum, observed for pure water with increasing pressure at the temperatures lower than 35℃, became shallow or disappeared in some cases as the temperature was raised or alkylammonium bromide was added. This solute-addition effect became large in order of the size of alkyl group, that is, Me, Et, n-Pr, and n-Bu. The activation energies of viscous flow estimated from the temperature dependence of the viscosity for R_4NBr solutions have a minimum at about 250 MPa as in the case of pure water.
社団法人日本材料学会の論文
1992-03-15