Journal
PLASTICS RUBBER AND COMPOSITES
Volume 38, Issue 7, Pages 290-296Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1179/146580109X12473409436580
Keywords
Carbon nanotubes; Natural rubber; Synergistic effect
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Funding
- National Basic Research Program of China [2007CB714701]
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Carbon black (CB) and carbon nanotubes (CNTs) filled natural rubber (NR) composites were prepared. In order to overcome the dispersion of CNTs in rubber matrix, the surface modification of CNTs with bis-(gamma-triethoxysilylpropyl)-tetrasulphide (Si-69) was undertaken, and a two-step mixing process, i.e. the use of twin roll mill followed by mixing in a Haake Banbury mixer (TR-THM) was used. The structure and mechanical properties were investigated. The results show that the Si-69 treated CNTs (S-CNTs) were dispersed in the rubber matrix uniformly. Compared with CB/ NR composites without CNTs, the S-CNTs/CB/NR composites have better mechanical properties. When the ratio of S-CNTs/CB/NR was 5 : 20 : 100, the tear strength was improved by similar to 60%, and the mechanical properties reached a maximum. Dynamical mechanical analysis (DMA) reveals that with increasing content of CNT, the elastic modulus of composites at room temperature increases, and the maximum loss tangent and the corresponding glass transition temperature of composites decrease.
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