کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1251166 970890 2007 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Determination of Specific Refractive Index Increment (dn/dc)μ at a Constant Chemical Potential, for Solutions of Polymer in Mixed Solvents by the GPC Method
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Determination of Specific Refractive Index Increment (dn/dc)μ at a Constant Chemical Potential, for Solutions of Polymer in Mixed Solvents by the GPC Method
چکیده انگلیسی
A new chromatographic method is described for the determination of specific refractive index increment (dn/dc)ν at a constant chemical potential, for polymer/mixed solvent systems. In this method the (dn/dc) is obtained by measuring the areas of solvated-polymer peaks when the mixed solvent is used as an eluent. Values of (dn/dc)ν for the poly(dimethylsiloxane) (PDMS)-benzene-methanol system, determined by the proposed method are in good agreement with those determined by the conventional dialysis method. The new approach has the advantages of simplicity, fast speed, and high reproducibility. The experimental results for stearic acid-chloroform-methanol system show that this method can also be applied to nonpolymer/mixed solvent systems for the determination of (dn/dc)ν.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Research in Chinese Universities - Volume 23, Issue 5, September 2007, Pages 602-606
نویسندگان
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