PROGRESS IN THE CHARACTERISATION OF THE POLYURETHANE-SPECIFIC MATERIAL BEHAVIOUR

The development of the Gas-assisted-Reaction Injection Moulding (G-RIM) technique has been the subject of research activities at IKV for some years. To understand and explain the process phenomena observed in the Gas-assisted-Reaction Injection Moulding (G-RIM) technique, the reaction kinetics and rheological material behaviour needs to be examined. This is the subject of ongoing research activities at IKV. In this paper investigations on the rheokinetic and rheological material behaviour of a slow-reacting compact PU system are presented and mathematically described. The investigations have shown that the model developed for describing the reaction kinetics and the temperature and viscosity field reproduces the material behaviour under the real process conditions with a good degree of accuracy.