کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5413654 1506633 2007 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Thermo acoustic parameters in the nematic and isotropic phases of 5CB and tetraethyl methane in 5CB
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
Thermo acoustic parameters in the nematic and isotropic phases of 5CB and tetraethyl methane in 5CB
چکیده انگلیسی
The addition of non-rod like solute impurity to a liquid crystalline solvent leads to some exciting results such as depression of nematic-isotropic transition temperature and the formation of two-phase region. In view of this, specific volume and thermal expansion studies in the nematic and isotropic phases of p-n-pentyl-p1-cyanobiphenyl (5CB) and dilute solution of the quasispherical solute tetraethyl methane were considered. From these results thermo acoustic parameters such as isochoric temperature coefficient of internal pressure (X), isochoric volume expansivity (X1), the reduced compressibility (β∼), the reduced volume (V∼), isothermal microscopic Gruneisen parameter (Γ), Huggins parameter (F), fractional free volume (f) and Sharma parameter (So) are estimated both in nematic and isotropic regions. Using the data given by Oweimreen et al. [G.A. Oweimren, A.K. Shihab, K. Halhouli, S.F. Sikander, Mol. Cryst. Liq.Cryst. 138 (1986) 327] variations of these thermo acoustic parameters with temperature and two phase region are critically examined.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Molecular Liquids - Volume 130, Issues 1–3, 15 January 2007, Pages 112-118
نویسندگان
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