Influence of In-situ Grafting on the Dispersion of Carbon Black in Solvents and Natural Rubber |
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| Authors: | Haiyan Xu Yuanyi Cao Xuelian He Yunfeng Wu Yunmin Zhang Chifei Wu |
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| Affiliation: | Polymer Alloy Laboratory, School of Materials Science and Technology , East China University of Science and Technology , Shanghai, P.R. China |
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| Abstract: | In-situ grafting of natural rubber (NR) onto the carbon black (CB) surface by a solid-state method was used to obtain grafted carbon black (GCB). The morphology of the original CB and GCB particles was observed by AFM and TEM. The original CB particles fused together and occurred as large dendritic agglomerates while the GCB particles occurred as small aggregates about 150 nm in diameter. The dispersion and dispersion stability of CB and GCB in toluene and cyclohexene were studied by zeta potential and a spectrophotometer. The results showed that the grafting procedure can improve both dispersion and dispersion stability of CB particles. The dispersion in NR was studied by DMA and observed by SEM. It was shown that GCB has better dispersion than CB in a NR matrix. As expected a weakened filler-filler interaction and enhanced filler-polymer interaction occurred after grafting modification. |
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| Keywords: | carbon black dispersion dispersion stability grafting |
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