TAILIEUCHUNG - Báo cáo hóa học: " Sulfonated Styrene-(ethylene-co-butylene)-styrene/ Montmorillonite Clay Nanocomposites: Synthesis, Morphology, and Properties"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Sulfonated Styrene-(ethylene-co-butylene)-styrene/ Montmorillonite Clay Nanocomposites: Synthesis, Morphology, and Properties | Nanoscale Res Lett 2008 3 36-44 DOI S11671-007-9111-3 NANO EXPRESS Sulfonated Styrene- ethylene-co-butylene -styrene Montmorillonite Clay Nanocomposites Synthesis Morphology and Properties Anirban Ganguly Anil K. Bhowmick Received 20 August 2007 Accepted 28 November 2007 Published online 18 December 2007 to the authors 2007 Abstract Sulfonated styrene- ethylene-butylene -styrene triblock copolymer SSEBS was synthesized by reaction of acetyl sulfate with SEBS. SSESB-clay nanocomposites were then prepared from hydrophilic Na-montmorillonite MT and organically quaternary amine modified hydrophobic nanoclay OMT at very low loading. SEBS did not show improvement in properties with MT-based nanocomposites. On sulfonation 3 and 6 weight of SEBS hydrophilic MT clay-based nanocomposites exhibited better mechanical dynamic mechanical and thermal properties and also controlled water-methanol mixture uptake and permeation and AC resistance. Microstructure determined by X-ray diffraction atomic force microscopy and transmission electron microscopy due to better dispersion of MT nanoclay particles and interaction of MT with SSEBS matrix was responsible for this effect. The resulting nanocomposites have potential as proton transfer membranes for Fuel Cell applications. Key words SEBS Sulfonation Montmorillonite clay Nanocomposites Introduction In recent years there has been considerable interest in special composite materials that consist of a matrix usually a polymer filled with plate-like or flake-like inorganic fillers having at least one dimension in nanometer length scale and high aspect ratio. Such fillers can be extremely A. Ganguly A. K. Bhowmick El Rubber Technology Centre Indian Institute of Technology Kharagpur Kharagpur 721302 India e-mail anilkb@ effective in modifying the properties of polymers. Several orders of change in mechanical transport rheological electrical or thermal properties have been demonstrated in these composites .

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