کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
216403 | 1426270 | 2011 | 9 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Physicochemical properties of {1-methyl piperazine (1) + water (2)} system at T = (298.15 to 343.15) K and atmospheric pressure Physicochemical properties of {1-methyl piperazine (1) + water (2)} system at T = (298.15 to 343.15) K and atmospheric pressure](/preview/png/216403.png)
Densities (ρ) and viscosities (η) of aqueous 1-methylpiperazine (1-MPZ) solutions are reported at T = (298.15 to 343.15) K. Refractive indices (nD) are reported at T = (293.15 to 333.15) K, and surface tensions (γ) are reported at T = (298.15 to 333.15) K. Derived excess properties, except excess viscosities (Δη), are found to be negative over the entire composition range. The addition of 1-MPZ reduces drastically the surface tension of water. The temperature dependence of surface tensions is explained in terms of surface entropy (SS) and enthalpy (HS). The measured and derived properties are used to probe the microscopic liquid structure of the bulk and surface of the aqueous amine solutions.
► Densities, and viscosities of aqueous 1-methyl-piperazine solutions are reported.
► Surface tensions and refractive indices measurements are also reported.
► We suggest a possible formation of a complex between x1 = [0.2 and 0.3].
► All excess properties, except viscosities, are found to be negative.
Journal: The Journal of Chemical Thermodynamics - Volume 43, Issue 12, December 2011, Pages 1897–1905