کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5145904 1497343 2017 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Mechanical properties and morphology of polystyrene-co-acrylic acid synthesized as membranes for fuel cells
موضوعات مرتبط
مهندسی و علوم پایه شیمی الکتروشیمی
پیش نمایش صفحه اول مقاله
Mechanical properties and morphology of polystyrene-co-acrylic acid synthesized as membranes for fuel cells
چکیده انگلیسی
Two copolymers of poly(styrene-co-acrylic acid) (PS-AA) were synthesized in solution by radical polymerization and partially crosslinked by adding, either trimethylol propane trimethacrylate (TMPTMA) or divinylbenzene (DVB) to improve mechanical resistance. Copolymers were sulfonated with theoretical molar quantities of sulfuric acid (H2SO4 = 170%) and two different amounts of silver sulfate (Ag2SO4 = 0.11 or 0.055%). Materials were dissolved in three different solvent compositions: copolymer + THF, copolymer + THF+55% DMSO and copolymer + THF+110% DMSO and used to prepare membranes prepared by casting. Membranes were characterized by Thermomechanical Analysis (TMA), Scanning Electron Microscopy (SEM), Ionic Exchange Capacity (IEC) and Water Uptake (WU) capacity. Addition of DMSO to THF during casting procedure has an important increment on IEC and WU results; however, mechanical resistance is considerably reduced. SEM images show almost no pores in the membranes casted from THF alone, while increasing the amount of DMSO enhances porosity. Such phenomenon is responsible for reduced mechanical property (brittleness), as seen by TMA.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Hydrogen Energy - Volume 42, Issue 34, 24 August 2017, Pages 21880-21885
نویسندگان
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