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Akron, OH, United States

Yong K.C.,Rubber Research Institute of Malaysia | Yong K.C.,American Chemical Society Inc.
Gummi, Fasern, Kunststoffe | Year: 2013

Colourable, sulphur vulcanised epoxidised natural rubber (ENR)/polyaniline dodecylbenzenesulfonate (PAni.DBSA) blends with good electrical conductivities (up to 10-1 S cm-1) and good mechanical properties (including high damping) were successfully prepared. Effect of conductive filler particle's surface area and shape was studied for the vulcanised blends by testing them through 900 cycles of straining. The elongated shape of PAni.DBSA particles (as observed by using transmission electron microscope) did contribute to the very low percolation threshold for unstrained samples (about 3.0 wt% of PAni.DBSA loading) and the reproducible electrical behaviour (≥95 % retention of original unstrained value) for samples under straining cycles. With the ideal mechanical properties and reproducible electrical behaviour these vulcanised blends do have good potential to be used as flexible smart materials that can respond to a straining process.

Kroshefsky R.D.,METSS Corporation | Kroshefsky R.D.,American Chemical Society Inc. | Price J.L.,METSS Corporation | Price J.L.,American Chemical Society Inc. | And 2 more authors.
Gummi, Fasern, Kunststoffe | Year: 2010

Polymeric nanocomposites based on nanoclay, nanosilica, carbon nanotubes and ceramic or mineral nanoparticles have been developed for a variety of applications. The large surface-to-mass ratios of these particles require good adsorption of the polymeric material on the particle surface to provide the adhesion levels between the filler and matrix resin necessary for improved performance. We review the basic principles underlying these surface interactions and their application in the preparation of a variety of these nanocomposites, as well as in explaining their performance. We demonstrate that the principles underlying the compatibilisation of polymer blends and alloys can be successfully used to design nanocomposites and understand their performance.

Yagneswaran S.,American Chemical Society Inc. | Bulut U.,University of Texas at Dallas | Bulut U.,American Chemical Society Inc. | Banda M.,Clemson University | And 13 more authors.
Gummi, Fasern, Kunststoffe | Year: 2013

A new method for the surface modification of used tyre rubber (UTR) has been developped. The method involves hydrosilylation of ground tyre rubber with trichlorosilane (TCS) under various reaction conditions. The reaction has been carried out with and without solvents/catalysts (Karstedt's catalyst/Pt catalyst). Hydrosilylation of TCStreated UTR particles generated hydrosilylated rubber powder being functionalised with silanol groups. ATR-FTIR, solid state 13C NMR spectroscopy, and TGA evidenced the hydrosilylation of the rubber particles.

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