The filler effects on the chemoviscosity of thermosetting resins has not been studied extensively, but is vital to understanding the rheology of filled thermosets. For example, the effects of filler concentration on viscosity can be used in process control to monitor batch to batch variations or to provide essential information for research into alternative filler/resin batches.
Other work by Rydes included very high shear rate rheometry of filled polyesters, extensional rheometry for flow of filled thermosets through restrictions, and novel and on-line viscosity measurements for the production of filled polyesters.
It is envisaged that a standard method for the rheological characterization of filled thermosets will be developed in the future.
The appearance of yield stresses in filled thermosets has not been extensively studied.