کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
612377 880696 2007 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Partial molar volume of anionic polyelectrolytes in aqueous solution
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی شیمی کلوئیدی و سطحی
پیش نمایش صفحه اول مقاله
Partial molar volume of anionic polyelectrolytes in aqueous solution
چکیده انگلیسی

In this work the partial molar volumes (V)(V) of different anionic polyelectrolytes and hydrophobically modified polyelectrolytes (PHM) were measured. Polymers like polymaleic acid-co-styrene, polymaleic acid-co-1-olefin, polymaleic acid-co-vinyl-2-pyrrolidone, and polyacrylic acid (abbreviated as MAS-n, PA-n-K2, AMVP, and PAA, respectively) were employed. These materials were investigated by density measurements in highly dilute aqueous solutions. The molar volume results allow us to discuss the effect of the carboxylic groups and the contributions from the comonomeric principal chain. The PAA presents the smaller V, while the largest V value was for AMVP. The V of PHM shows a linear relationship with the number of methylene groups in the lateral chain. It is found that the magnitude of the contribution per methylene group decreases as the hydrophobic character of the environment increases.

This figure shows an anionic polyelectrolyte hydrophobically modified by its counterion in aqueous solutions adopting a nonextended conformation.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Colloid and Interface Science - Volume 309, Issue 2, 15 May 2007, Pages 435–439
نویسندگان
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