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| Volume 4, Issue 04 - 2008 |
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| 4 |
THE EFFECT OF ADDED DISPERSANT ON STRUCTURE AND MECHANICAL PROPERTIES OF LAYERED SILICATES REINFORCED NATURAL AND POLYBUTADIENE RUBBER BLENDS |
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| Pages 146-152 |
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| O. WILCZYNSKI1, D. HNIDAKOVA2, J.SPACEK2 |
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1 Tomas Bata University in Zlin, Faculty of Technology, Department of Production Engineering, Nam. T.G.M. 272, 762 72 Zlin, Czech Republic
2 Tomas Bata University in Zlin, Faculty of Technology, Department of Polymer Engineering, Nam. T.G.M. 272, 762 72 Zlin, Czech Republic
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| Received 13 October 2008; accepted 23 December 2008 |
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| This investigation describes two dispersant to obtain rubber nanocomposites based on natural rubber (NR), polybutadiene rubber (BR) and organophilic layered silicates Cloisite 15A® (C15A). In order to improve the exfoliation and intercalation of the organoclay with the rubber matrix, standard mixing process of the organoclay and elastomer has been used. The effect of the addition during mixing of a coupling agent, namely bis-(trietoxysilyl-propyl)-tetrasulfan (TESPT), on the behaviour of the composites was also investigated. The results show that a low amount of organoclay (10phr) and dispersant (2phr) significantly improves the properties of natural and polybutadiene rubber blends. Strong rubber – organoclay interaction which is attributed to a high degree of intercalation and exfoliation, as was confirmed from X-ray diffraction and transmission electron microscopy (TEM). An even further increase in the properties is observed by treating the silicate with a silane coupling agent. The silane functional groups reacted with the clay surface and polymer matrix and improve compatibility between each other.
Keywords: rubber nanocomposites, Cloisite 15A, TESPT, mechanical properties |
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