Review of Non-Newtonian Mathematical Models for Rheological Characteristics of Viscoelastic CompositesReport as inadecuate




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This study presents an overview of viscoelastic characteristics of biocomposites derived of natural-fibre-reinforced thermoplastic polymers and predictive models have been presented in order to understand their rheological behavior. Various constitutive equations are reviewed for a better understanding of their applicability to polymer melt in determining the viscosity. The models to be investigated are the Giesekus-Leonov model, the Upper Convected Maxwell UCM model, the White-Metzner model, K-BKZ model, the Oldroyd-B model, and the Phan-Thien-Tanner models. The aforementioned models are the most powerful for predicting the rheological behavior of hybrid and green viscoelastic materials in the presence of high shear rate and in all dimensions. The Phan-Thien Tanner model, the Oldroyd-B model, and the Giesekus model can be used in various modes to fit the relaxation modulus accurately and to predict the shear thinning as well as shear thickening characteristics. The Phan-Thien Tanner, K-BKZ, Upper convected Maxwell, Oldroyd-B, and Giesekus models predicted the steady shear viscosity and the transient first normal stress coefficient better than the White-Metzner model for green-fibre-reinforced thermoplastic composites.

KEYWORDS

Rheological Behavior, Mathematical Models, Viscoelastic Characteristics, Non-Newtonian Fluids, Shear Viscosity

Cite this paper

Cherizol, R. , Sain, M. and Tjong, J. 2015 Review of Non-Newtonian Mathematical Models for Rheological Characteristics of Viscoelastic Composites. Green and Sustainable Chemistry, 5, 6-14. doi: 10.4236-gsc.2015.51002.





Author: Robenson Cherizol1,2,3*, Mohini Sain1,3, Jimi Tjong2

Source: http://www.scirp.org/



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