Modification of Stokes-Einstein Equation for Diffusivities in Dilute Polymer Solutions
عنوان مقاله: Modification of Stokes-Einstein Equation for Diffusivities in Dilute Polymer Solutions
شناسه ملی مقاله: NICEC08_067
منتشر شده در هشتمین کنگره ملی مهندسی شیمی ایران در سال 1382
شناسه ملی مقاله: NICEC08_067
منتشر شده در هشتمین کنگره ملی مهندسی شیمی ایران در سال 1382
مشخصات نویسندگان مقاله:
Mansooreh Soleimani - Department of Chemical Engineering, Amirkabir University of Technology, Tehran, Iran
Hamid Modarress - Department of Chemical Engineering, Amirkabir University of Technology, Tehran, Iran
خلاصه مقاله:
Mansooreh Soleimani - Department of Chemical Engineering, Amirkabir University of Technology, Tehran, Iran
Hamid Modarress - Department of Chemical Engineering, Amirkabir University of Technology, Tehran, Iran
An improved correlation is presented for the estimation of binary diffusion coefficients in various dilute polymer solutions. The correlation is based on the Stokes-Einstein equation with empirical corrections for the nonroundness and the size ratio of polymer and solvent molecules. These
corrections are computed from the UNIQUAC or UNIFAC group contribution R and Q parameters. The method works well for various polymer systems. The proposed correlation reduced the average error from 133% to 33%.
کلمات کلیدی: Diffusion coefficient, Dilute polymer solution, Stokes-Einstein Equation
صفحه اختصاصی مقاله و دریافت فایل کامل: https://civilica.com/doc/48126/