The effect of internal mixer variables on the rheological properties and extrusion characteristics of an ethylene-propylene rubber compound

The influence that changes in mixing variables exert on the subsequent processing behaviour of rubber compounds is recognised throughout the rubber industry. In the light of this statement an investigation was set with the following objectives: (i) define this influence; (ii) correlate the rheological properties which control extrusion behaviour with the properties which represent the behaviour; (iii) determine degree of control which needs to be delivered at the internal mixer to produce a uniform feed-stock for extruders. [Continues.]