Kinetic study of the sulfonation of hydrogenated styrene butadiene block copolymer (HSBS): Microstructural and electrical characterizations
作者： A. Navarro , C. del Río , J.L. Acosta
DOI: 10.1016/J.MEMSCI.2007.05.009
关键词: Materials science 、 Dynamic mechanical analysis 、 Styrene-butadiene 、 Differential scanning calorimetry 、 Infrared spectroscopy 、 Dielectric spectroscopy 、 Copolymer 、 Styrene 、 Chemical engineering 、 Polymer chemistry 、 Thermogravimetric analysis
摘要: Abstract In this work homogeneous sulfonation kinetic and both, microstructural electrical characterizations of hydrogenated styrene butadiene block copolymer (HSBS) were studied. The incorporation sulfonic groups was checked by infrared spectroscopy (FTIR-ATR) the level determined elemental analysis (E.A.) chemical titration. Thermal behavior studied differential scanning calorimetry (DSC) thermogravimetric (TGA), in order to determine thermal transitions stability, respectively. Microstructure studied, means dynamic mechanical (DMA). Atomic force microscopy (AFM) for several samples evidenced a morphology change when increases. Finally, recorded electrochemical impedance (EIS) four-probe technique (FPT). Results show that benzene rings, units, has effectively occurred increases with reaction time. When incrementing level, structural observed. Interconnected clusters allow proton conduction through membrane. ion conductivity obtained about 10 −2 S/cm.
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