Cure characteristics and mechanical properties of hydrogenated natural rubber/natural rubber blends |
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| Authors: | N. Hinchiranan W. Lertweerasirikun W. Poonsawad G. L. Rempel P. Prasassarakich |
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| Affiliation: | 1. Department of Chemical Technology, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand;2. Center of Excellence for Petroleum, Petrochemicals, and Advanced Materials, Chulalongkorn University, Bangkok 10330, Thailand;3. Department of Chemical Engineering, University of Waterloo, Ontario, Canada N2L 3G1 |
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| Abstract: | The cure characteristics and mechanical properties of blends consisting of hydrogenated natural rubber (HNR) and natural rubber (NR) blends were investigated. The HNR/NR blends at 50/50 wt ratio were vulcanized using various cure systems: peroxide vulcanization, conventional vulcanization with peroxide, and efficient vulcanization with peroxide. The HNR/NR vulcanizates cured by the combination of peroxide and sulfur donor (tetramethylthiuram disulfide, TMTD) in the efficient vulcanization with peroxide exhibited the best mechanical properties. It was also found that the hydrogenation level of HNR did not affect the tensile strength of the vulcanizates. The tensile strength of the blends decreased with increasing HNR content because of the higher incompatibility to cause the noncoherency behavior between NR and HNR. However, the HNR/NR vulcanizate at 50/50 wt ratio showed the maximum ultimate elongation corresponding to a co‐continuous morphology as attested to by scanning electron micrographs. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2009 |
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| Keywords: | vulcanization mechanical properties blending natural rubber hydrogenated natural rubber |
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