HEAT TRANSFER IN POLYMER PROCESSING MEASURED WITH A CAPILLARY RHEOMETER

A. Göttfert, J. Sunder
Göttfert GmbH, Germany

Abstract

Heat transfer is important to optimise polymer processing. Since recent years model processing is getting more and more important to successfully simulate divers processes. Commercial software requires a range of heat transfer parameters. A triple bore capillary rheometer has been designed to provide one single bore for measurements of the thermal conductivity while the second and the third bore is still available for routine viscosity tests, ideally on the same material. A conductivity probe is placed in the dedicated bore. A heating wire and a thermocouple are placed into the probe. A defined amount of heat is transported to the heating wire. The increase of temperature is measured by the thermocouple. Results will be presented for different polymer melts.