کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1804151 1024644 2007 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Preparation of magnetic latexes functionalized with chloromethyl groups via emulsifier-free miniemulsion polymerization
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
Preparation of magnetic latexes functionalized with chloromethyl groups via emulsifier-free miniemulsion polymerization
چکیده انگلیسی

Functionalized crosslinked polystyrene-co-divinylbenzene-co-chloromethylstyrene magnetic latex particles were prepared via emulsifier-free miniemulsion polymerization using 2, 2′ azobis (2-amidinopropane) dihydrochloride (V-50) as an initiator and in the presence of magnetite nanoparticles in the monomers. Transmission electron microscopy (TEM) proved the presence of magnetite nanoparticles in polymer particles. Differential scanning calorimetery (DSC) analysis of the product showed an exothermic signal due to crosslinking of chains through electrophilic aromatic substitution of phenyl groups with chloromethyl groups in the presence of the dispersed Fe3O4 as Lewis acid. This was proven by thermogravimetric analysis (TGA) via the loss of gaseous HCl. The results were also compared with those of magnetite-free miniemulsion polymerization using V-50.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Magnetism and Magnetic Materials - Volume 311, Issue 1, April 2007, Pages 55–58
نویسندگان
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