
handle: 10261/4540
[ES] Se han preparado y caracterizado nanocomposites de caucho natural reforzados con bentonita modificada orgánicamente con una sal de amonio. Se pretende evaluar la posibilidad de utilizar estas cargas claras como sustitutos del negro de carbono en las formulaciones de caucho natural. Las curvas de vulcanización muestran que tanto la bentonita organofilizada como el negro de carbono aceleran la reacción de vulcanización y además, dan lugar a un considerable incremento en el torque. No obstante, es interesante destacar que estos efectos son más marcados en el caso de la organobentonita. Por su parte, la caracterización mecánica muestra el fuerte efecto reforzante de ambas cargas, si bien este efecto es nuevamente más acusado en presencia de la organobentonita. Es importante señalar que las propiedades mecánicas del nanocomposite reforzado con 10 partes de organobentonita son similares a las del composite con 40 partes de negro de carbono.
[EN] Rubber compounds based on natural rubber reinforced with ammonium salt modified bentonite have been prepared and characterized. It pretends to evaluate the possibility of using these white fillers as substitute of carbon black in natural rubber compounds. Vulcametric curves show that the organoclay and carbon black accelerate the vulcanization reaction and, furthermore, give rise to a marked increase in the torque. However, it is of interest to point out that these effects are more marked in the case of the organoclay. In addition, the mechanical characterization show the strong reinforcing effect of both fillers, but this effect is newly more sensible when the organoclay is added to the NR. It is worthy to note that the mechanical properties of 10% organoclay-NR nanocomposite are comparable to the 40 phr carbon black filled compound.
Los autores agradecen al CICYT, MAT 2001-1634 por su ayuda económica. El Dr. López Manchado agradece al Ministerio de Ciencia y Tecnología de Polímeros la concesión del contrato Ramón y Cajal.
Peer reviewed
negro de carbono, Organobentonita, carbon black, natural rubber, Clay industries. Ceramics. Glass, Organobentonite, Nanocomposites, Natural rubber, TP785-869, organobentonita, Carbon black, caucho natural, organobentonite, Negro de carbono, Caucho natural
negro de carbono, Organobentonita, carbon black, natural rubber, Clay industries. Ceramics. Glass, Organobentonite, Nanocomposites, Natural rubber, TP785-869, organobentonita, Carbon black, caucho natural, organobentonite, Negro de carbono, Caucho natural
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