Hi Ernest,

Yes certainly, it is pretty simple if your sample is Newtonian (ie viscosity doesn't change with shear rates) and you just need to know the dimensions of the Ubbelohde capillary and density of the sample if it's non-Newtonian to approximate the same shear conditions.

If you think the sample is either Newtonian or nearly so, use the rheometer in the normal way and use a table of shear rates from the toolkit (Toolkit_V001 Shear Rate Table).  Using a range of 10 - 500 1/s with a cone or parallel plates should give good data for almost any low viscosity liquid.  The kinematic viscosity (as would be derived from an Ubbelohde tube) can then be calculated from measured shear viscosity using the density of the sample (Kinematic Viscosity = Shear viscosity / density in g/ml).

If you have a non-Newtonian sample, please let me know and I'll address that more complicated situation.

Regards,

Phil

Thanks Mr. Philip Rolfe for your answer. My solution is non-Newtonian that exhibits shear-thinning properties with increasing shear rates. Is there a way to measure intrinsic viscosity with my existing rheometer? Thank you.

Dear Ernest, 

I could advice you using the same way I did with the Kinexus Pro+ rheometer.

You can determine the Intrinsic viscosity by using the equations of Huggings and Kramer. You will need to measure the zero shear viscosty for different solutions. The way to do so, is preparaing the solutions using the same solvent and sufficiently low concentrations and create a graph polymer concentration versus reduced viscosity and inherent viscosity.  Some examples of the approach can be found in the following references:

- Sorbie, K.S., Polymer-Improved Oil Recovery. 1991: Blackie. 43 - 46.

- Morris, E.R., Cutler, A. N., Ross-Murphy, S. B., Rees, D. A., Price, J., Concentration and Shear Rate Dependence of Viscosity in Random Coil Polysaccharide Solutions. Carbohydrate Polymers, 1981. 1(1): p. 5-21.

- Grigorescu, G., Kulicke, W.-M., Prediction of Viscoelastic Properties and Shear Stability of Polymers in Solution, in Viscoelasticity, Atomistic Models, Statistical Chemistry. 2000, Springer Berlin Heidelberg: Berlin, Heidelberg. p. 1-40.

- Hincapie, R.E., Pore-scale Investigation of the Viscoelastic Phenomenon during Enhanced Oil Recovery (EOR) Polymer Flooding through Porous Media, Dissertation. 2016, Clausthal-Zellerfeld: Verlag Papierflieger GmbH, ISBN: 978-3-86948-531-7.

The atatched file my also help.

Please do contact me if you require adittional support.

Cheers, 

Ralph