UPM Institutional Repository

Shear thinning and frequency-dependent behaviour of adsorbed polymer layers. Part II. Three-layer flow model.


Abdul Rashid, Suraya and Lawrence, Christoper J. and Luckham, Paul F. (2008) Shear thinning and frequency-dependent behaviour of adsorbed polymer layers. Part II. Three-layer flow model. Journal of Non-Newtonian Fluid Mechanics, 148 (1-3). pp. 65-72. ISSN 0377-0257


A novel hydrodynamic model called the three-layer flow (TLF) model has been developed to enable the quantification of viscoelastic properties of adsorbed polymer layers obtained from nanorheological experiments. By comparing the qualitative experimental data to the TLF Model, four specific parameters could be quantified from the best fit curve; these are the apparent thickness of the adsorbed layer, the real and imaginary components of the layer viscosity, and the apparent solvent viscosity. It was found that the comparison between experimental data and the TLF Model showed excellent agreement for separation distances larger than the overlap region. Furthermore, by comparing the TLF Model with experimental data at different frequencies, an apparent link was found between the complex modulus cross-over point and the adsorbed layer thickness. For adsorbed hydroxypropyl guar (HPG) layers, the cross-over point occurred when the surface separation distance was approximately equal to the thickness of a single adsorbed layer, indicating a relatively viscous nature. Finally, a direct comparison between nanorheological data with standard rheometry measurements also provided some indication of the reliability of the model.

Download File

PDF (Abstract)
Shear thinning and frequency dependent behaviour of adsorbed polymer layers Part I.pdf

Download (85kB) | Preview

Additional Metadata

Item Type: Article
Divisions: Faculty of Engineering
DOI Number: https://doi.org/10.1016/j.jnnfm.2007.04.017
Publisher: Elsevier
Keywords: Hydroxypropyl guar; Nanorheology; TLF Model.
Depositing User: Fatimah Zahrah @ Aishah Amran
Date Deposited: 03 Jan 2014 02:10
Last Modified: 04 Dec 2015 08:20
Altmetrics: http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.1016/j.jnnfm.2007.04.017
URI: http://psasir.upm.edu.my/id/eprint/16695
Statistic Details: View Download Statistic

Actions (login required)

View Item View Item