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Victor Chike Agbakoba, Percy Hlangothi, Clarence Yah, Geoffrey Simate
A study of the flow behavior of prevulcanised natural rubber latex/singlewalled carbon nanotubes (SWCNT) blends using rotational viscometry and power law model

Appl. Rheol. 28:6 (2018) 64175 (10 pages)

Abstract: This work describes the flow behavior of prevulcanised natural rubber latex (PvNRL) and PvNRL nanoblends containing 0.02, 0.04, 0.06, and 0.08 wt.% of aqueous dispersion of single-walled carbon nanotubes (SWCNT). The assay was performed under varying shear rates (between 0.1-100 1/s) at three separate isothermal temperatures (25, 30, and 35 °C) on a Modular Compact Rheometer (MCR) fitted with a concentric cylinder measuring system. A steady decrease in viscosity upon every single shear rate increment was observed for all the samples analysed. Thus, each measured viscosity was considered an apparent-viscosity; which confirms a typical non-Newtonian flow behavior. PvNRL blends containing highest wt.% SWCNT exhibited higher apparent viscosity at low shear rates, whereas the lowest wt.% SWCNT displayed a lower apparent viscosity, thus signifying a dilution effect. The power law model showed good fitting and successfully predicted the flow behavior within the modelled shear rate region. © 2018 Applied Rheology.

DOI 10.3933/ApplRheol-28-64175

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