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Elastomer Polarity Driven Morphology Development and Clay Localization in the Organoclay Filled Rubber Blends Nanocomposites

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This work introduces the application of the online method based on the electrical conductance for the characterization of elastomer polarity effect on the morphology development and the kinetics of clay distribution in Hydrogenated Nitrile Butadiene rubber/Natural Rubber (HNBR/NR) and Hydrogenated Nitrile Butadiene rubber/Epoxidized Natural Rubber 50 (HNBR/ENR50) blend nanocomposites during the mixing process. A correlation between the conductance and the degree of dispersion of the nanoclay used is established and discussed. The dispersion of the nanoclay is characterized by using techniques such as TEM, AFM, and SAXS. It is found that the online electrical conductance not only depends on the phase specific localization of the organoclay but also on the change of the blend morphology either from the co-continuous to island matrix or the complete phase inversion. The former is due to favorable interaction of the organoclay with one of the blend phases whereas the latter is due to the migration of the organoclay at the interfaces. The polarity of the blend phases provides the driving force for the localization of the organoclay in the organoclay filled blends nanocomposites either in one of the phases or at the interface. Thus, the online conductance method promises a powerful tool, for research of the organoclay dispersion processes on the laboratory scale and for the monitoring of the quality of rubber-organoclay composites on the production scale.
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Document Type: Research Article

Publication date: June 1, 2012

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  • Journal of Colloid Science and Biotechnology is an international multidisciplinary peer- reviewed journal covering all aspects of colloid science including colloids preparation, characterization, structure-property relationships, spectroscopy, chemical and physical properties and applications of colloids in biotechnology, medicine and pharmaceuticals. This journal deals with interdisciplinary research areas of chemistry, physics, biology, materials science, polymer science, nanotechnology covering all topics related to colloids such as latexes, emulsions, suspensions, micellar systems, gels, composites, hybrids, surfactants, aerosols, foams, minerals, soft matter, microfluidics, encapsulation processes of active molecules, biomolecules, surfacial and interfacial processes, catalysis, electrochemistry, theoretical aspects, computer simulations and colloids in biotechnology and medicine.
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