Effects of Carbon Nanotube on Tensile and Dynamic Mechanical Properties of NR/SBR and NR/XSBR Nanocomposites Prepared by Latex Compounding

Abstract:

In this study, natural rubber/styrene butadiene rubber (NR/SBR) and NR/carboxylated styrene butadiene rubber (NR/XSBR) nanocomposites with carbon nanotube (CNT) were prepared by a latex compounding method. The dry weight ratio of either NR/SBR or NR/XSBR was fixed to 80/20 and the CNT loading in each blend was varied from 0.1 to 0.4 phr. The nanocomposite latices were cast into sheets on a glass mold and then cured at 80°C for 3 h. The tensile properties (tensile strength, modulus at 300% strain, elongation at break) and dynamic mechanical properties (storage modulus, loss tangent) of the vulcanizates were then evaluated. The results showed that the addition of CNT at a very loading could enhance the tensile strength, modulus at 300% strain and storage modulus of these two rubber bends in a dose dependent manner, except that the tensile strength peaked at an optimum filler level, declining at higher filler loadings, whilst the elongation at break deteriorated. Moreover, the tensile strength and modulus at 300% strain of the NR/XSBR nanocomposites appeared to be higher than those of the NR/SBR nanocomposites at the same CNT loadings.

• Periodical: Advanced Materials Research (Volumes 488-489)
• Pages: 612-616
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.488-489.612
• Online since: March 2012
• Authors: Anyaporn Boonmahitthisud, Saowaroj Chuayjuljit
• Keywords: Carbon Nanotube (CN), Latex Compounding, NR, SBR, XSBR

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