The significance of carbon nanotubes on styrene butadiene rubber (SBR) and SBR modified mortar |
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Authors: | Eslam M Soliman Usama F Kandil Mahmoud M Reda Taha |
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Affiliation: | (1) Department of Civil Engineering, University of New Mexico, Albuquerque, NM, USA;(2) Egyptian Petroleum Research Institute, Cairo, Egypt; |
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Abstract: | A New approach is introduced to incorporate multi-walled carbon nanotubes (MWCNTs) in cementitious materials. The MWCNTs are
dispersed in styrene butadiene rubber (SBR) matrix before mixing the matrix with cement. Surfactants have been successfully
applied to enhance the dispersion and functionalization of MWCNTs in SBR. The significance of using this MWCNTs–SBR nanocomposite
on the mechanical characteristics including compressive and tensile strengths and microstructural features of latex modified
mortar (LMM) were examined. Subsequently, the significance of the functionalized MWCNTs on surface chemistry, microstructure
and thermal stability of SBR were characterized. MWCNTs were found to be a useful additive for enhancing the mechanical response
and thermal stability of SBR. MWCNTs–SBR nanocomposite was observed to be able to bridge micro-cracks in the LMM which helped
enhancing its mechanical properties. The ability of MWCNTs to enhance the mechanical response of SBR polymer matrix might
be attributed to chemical bond that functionalized MWCNTs can establish with the SBR polymer matrix. The enhanced MWCNTs–SBR
nanocomposite gave rise to improved microstructural features of the LMM. Microstructural investigations showed MWCNTs were
well dispersed in and bonded to the SBR matrix. |
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