کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10603183 982468 2005 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Synthesis and characterization of a novel alginate-poly(ethylene glycol) graft copolymer
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
پیش نمایش صفحه اول مقاله
Synthesis and characterization of a novel alginate-poly(ethylene glycol) graft copolymer
چکیده انگلیسی
Sodium alginate grafted with low molecular weight polyethylene glycol (PEG) was prepared by reacting a mono-carboxyl terminated PEG with a sodium alginate modified by inserting a given amount of amine functionalities. The coupling between PEG and alginate was carried out using carbodiimide chemistry in aqueous solutions. Significant reduction of the molecular weight of alginate is recorded, as expected from literature reports. The chosen strategy allowed to graft significant amounts of PEG saving the carboxylic functionalities of alginate, necessary for the cross-linking of the polysaccharide. The chemical structure and chemical-physical properties of alginate derivatives were characterized by FTIR, 1H and 13C NMR, DSC, TGA and wide angle X-ray analysis.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Carbohydrate Polymers - Volume 62, Issue 3, 1 December 2005, Pages 274-282
نویسندگان
, , , ,