Abstract
Abstract New materials of skim NR–clay nanocomposites were prepared by a coagulating method using several organoclays, i.e., dodecyl ammonium–montmorillonite, Cloisite 15A, Cloisite 20A, and Cloisite 25A, which were modified by dodecyl ammonium chloride, dimethyl dehydrogenated tallow quaternary ammonium chloride, dimethyl dehydrogenated tallow quaternary ammonium chloride, and dimethyl hydrogenated tallow 2 ethylhexyl quaternary ammonium methyl sulfate, respectively. X-ray diffraction revealed that the intercalated nanocomposites were formed depending on the type and content of organoclays, and the excellent dispersion of clay in rubber matrix could be confirmed by transmission electron microscopy micrographs. In addition, thermal stability of the coagulated skim rubber–organoclay nanocomposites was improved as shown by the thermogravimetric analysis. The mechanical properties and dynamic-mechanical thermal analysis revealed that hardness and storage modulus of nanocomposites were improved and the glass transition temperature of nanocomposites increased as compared with that of the pure skim NR. Thus, not only recovery of this significant fraction of the lost rubber material but also reinforced skim rubber particles were obtained by the use of a coagulating method using several organoclays.
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