Keywords : Thixotropy flow
Engineering and Technology Journal,
2009, Volume 27, Issue 4, Pages 799-808
The present investigation is concerned to study the influence of poly vinyl
acetate (PVAc.) on flow behavior of bentonite dispersions in water, poly vinyl acetate
was added to the bentonite dispersion in different concentration (5, 7.5, 10, 12.5, 15, 17.5
and 20) gm/l. after that, the flow properties of these samples was measured and that
included (viscosity, shear stress, shear rate and Bingham yield value), The results show
thixotropy flow by a hysteresis loop of the flow curves for bentonite dispersion with and
without poly vinyl acetate, but with (PVAc.) give higher fluidity flow.
Also the morphology of bentonite dispersions was analyzed before and after adding
poly vinyl acetate by scanning electron micrograph (SEM), it is show that a weak
association between (PVAc.) and bentonite dispersions.