Propriedades reológicas de suspensões de alumina em polidimetilsiloxano.

Abstract

The fluid dynamic of suspensions is one of more developed fields of the rheology in the last years. Although a considerable amount of papers have been published, there are some points open to discussion yet. There is a huge variety of suspension systems which are not explained by the rheological models available at present. This is the case of PDMS (polydimethylsiloxane)/Alumina systems which are very used, but negligible information is available about its rheological behavior. The objective of the present work is to study the alumina suspensions in two types of silicone fluids with different viscosities. The effect of alumina concentration on the rheological behavior o f these suspensions was studied. Some mathematical models were proposed to adjust the experimental data with good fitting.