کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
216750 1426278 2011 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Relative permittivity data of binary mixtures containing 2-butanol, 2-butanone, and cyclohexane
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Relative permittivity data of binary mixtures containing 2-butanol, 2-butanone, and cyclohexane
چکیده انگلیسی

Relative permittivity measurements were made on binary mixtures of (2-butanol + 2-butanone) and (2-butanol or 2-butanone + cyclohexane) for various concentrations at T = (298.2, 308.2, and 318.2) K. Some experimental results are compared with those obtained from theoretical calculations and interpreted in terms of homo- and heterogeneous interactions and structural effects. The molecular dipole moments were determined using Guggenheim–Debye method within the temperature range of (298.2 to 318.2) K. The variations of effective dipole moment and correlation factor, g, with the mole fraction in these materials were investigated using Kirkwood–Frohlich equation. The pure compounds showed a negative and small temperature coefficient of effective dipole moment. In order to obtain valuable information about heterogeneous interaction (interactions between the unlike molecules), the Kirkwood correlation factor, the Bruggeman dielectric factor and the excess permittivity were calculated. In order to predict the permittivity data of polar–apolar binary mixtures, five mixing rules were applied.

Research highlights
► Kirkwood g factor values indicate parallel dipole association for s-BuOH and MEK.
► Heterogeneous interactions are dominant in (s-BuOH + MEK) mixtures.
► Mixing rules predict permittivity of s-BuOH and MEK in nonpolar media acceptably.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: The Journal of Chemical Thermodynamics - Volume 43, Issue 4, April 2011, Pages 569–575
نویسندگان
, , ,