کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
639589 1456196 2006 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Modified sulfonated poly(arylene ether sulfone)-b-polybutadiene (SPAES-b-PB) membrane for fuel cell applications
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تصفیه و جداسازی
پیش نمایش صفحه اول مقاله
Modified sulfonated poly(arylene ether sulfone)-b-polybutadiene (SPAES-b-PB) membrane for fuel cell applications
چکیده انگلیسی

Membranes based on new sulfonated poly(arylene ether sulfone)-b-polybutadiene (SPAES-b-PB) block copolymers were prepared by solution casting method. Epoxidation of the membranes at PB blocks of copolymer was conducted by an in situ generated peracid method. The kinetic of epoxidation process was studied by Fourier transform infrared spectroscopy (FTIR). Notable changes of microstructure and surface morphology of membranes were observed by transmission electron microscopy (TEM) and scanning electron microscopy (SEM). We found that the tensile strength and the thermal decomposition temperature of epoxidized membranes were higher than those of unepoxidized membranes, and they increased remarkably with increasing the degree of sulfonation (DS). The proton conductivity of epoxidized membrane with DS of 15.7% was higher than that of unepoxidized sample at all testing temperatures and reached 1.43 × 10−1 S/cm at 90 °C. All these property changes occurred due to epoxidation modification which induced rearrangements and uniform distributions of hydrogen bonds intra and inter macromolecular chains to form channel-like phase separated microstructure.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Membrane Science - Volume 275, Issues 1–2, 20 April 2006, Pages 119–126
نویسندگان
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