کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
9675882 1454109 2005 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Microstructural characterisation and behaviour in different salt solutions of sodium polymethacrylate-g-PEO comb copolymers
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی شیمی کلوئیدی و سطحی
پیش نمایش صفحه اول مقاله
Microstructural characterisation and behaviour in different salt solutions of sodium polymethacrylate-g-PEO comb copolymers
چکیده انگلیسی
Different polycarboxylate polymers (PCPs) have been characterised and their microstructure investigated by size exclusion chromatography, 1H and 13C nuclear magnetic resonance spectroscopy. These polymers are comb-like with a sodium polymethacrylate backbone (PMAANa) on which poly(ethylene oxide) (PEO) chains are randomly grafted as shown by 13C NMR measurements. Since they are mostly used as superplasticisers in cementeous applications, their behaviour has been investigated at high pH in various salt solutions; average radii were determined at room temperature by static and dynamic light scattering and phase diagrams were determined as a function of temperature. We tried to evaluate the influence of different parameters (ion valence, cations, anions, PCP molecular weight, PEO length and grafting degree). A few experiments on homopolymers (PEO and PMAANa) have been equally performed in order to better understand the behaviour of PCPs in solution.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Colloids and Surfaces A: Physicochemical and Engineering Aspects - Volume 260, Issues 1–3, 15 June 2005, Pages 173-182
نویسندگان
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