RCR- A fast rheological testing with higher selectivity of elastomer compounds and thermo sets

A. Göttfert, Göttfert GmbH, Germany
J. Sunder, Göttfert GmbH, Germany

Abstract

Quick tests of elastomer compounds are usually done at low shear rates far from processing. A rheological characterisation of thermo sets under curing conditions like in
the later processing is so far not possible. A new device, the “RCR” a further development of the “Rheovulkameter” concept is described. The selectivity is
compared to a standard Mooney and rheometer measurement for elastomer compounds. A model to estimate entrance pressure loss to characterize elongation behaviour from the simple extrusion test is introduced and compared
to capillary rheometer data. Finally the determination of rheological parameters of thermo set material under process like conditions is introduced.