کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10548180 | 965428 | 2005 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Determination of thermodynamic properties of isotactic poly(1-butene) at infinite dilution using density and inverse gas chromatography
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Determination of thermodynamic properties of isotactic poly(1-butene) at infinite dilution using density and inverse gas chromatography Determination of thermodynamic properties of isotactic poly(1-butene) at infinite dilution using density and inverse gas chromatography](/preview/png/10548180.png)
چکیده انگلیسی
The partial molar volumes, V1M, and the molar volume of isotactic crystalline low-molecular-weight poly(1-butene), iPBu-1, V1, have been calculated from the measured density of {iPBu-1 + solvent (n-hexane, n-heptane, n-nonane, n-decane, p-xylene, cyclohexane and chloroform)} systems. Some of the thermodynamic quantities were also obtained for the iPBu-1 with eight hydrocarbons (n-octane, n-decane, n-undecane, n-dodecane, n-tridecane, o-xylene, m-xylene, p-xylene) by the method of inverse gas chromatography at various temperatures. The weight fraction activity coefficients of the solvent at infinite dilution, Ω2â, and the Flory-Huggins thermodynamic interaction parameters, Ï21â, between polymer and solvents were determined. The partial molar free energy, ÎG2â, the partial molar heat of mixing, ÎH2â, at infinite dilution and the polymer solubility parameter, δ1, were calculated. Additionally, the (solid + liquid) binary mixtures equilibria, SLE, of iPBu-1 with three hydrocarbons (n-octane, n-decane and m-xylene) were studied by a dynamic method. By performing these experiments over a large concentration range, the T-x phase diagrams of the polymer-solvent systems were constructed. The excess Gibbs energy models were used to describe the nonideal behaviour of the liquid phase. The Ω2â were determined from the solubility measurements and were predicted by using the UNIFAC FV model.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Chromatography A - Volume 1068, Issue 2, 18 March 2005, Pages 297-305
Journal: Journal of Chromatography A - Volume 1068, Issue 2, 18 March 2005, Pages 297-305
نویسندگان
Marta Karolina KozÅowska, Urszula DomaÅska, MaÅgorzata Lempert, Marek Rogalski,