کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9625902 | 460730 | 2005 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
New expressions for non-randomness in equation-of-state models
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
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چکیده انگلیسی
A new approach to non-randomness in mixtures of r-mer fluids is presented. This approach leads to new consistent analytical expressions for the local compositions or the non-randomness factors in solutions. These expressions are compared with the corresponding expressions of Guggenheim's quasi-chemical approximation. The new expressions are implemented in an equation-of-state framework valid for both the liquid and the gaseous state. The resulting new model is applied to systems of small molecules as well as to polymers. The model calculates a significant degree of non-randomness in the distribution of free volume even in non-polar systems such as the linear polyethylene.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Fluid Phase Equilibria - Volume 237, Issues 1â2, 25 October 2005, Pages 130-139
Journal: Fluid Phase Equilibria - Volume 237, Issues 1â2, 25 October 2005, Pages 130-139
نویسندگان
Costas Panayiotou,