Abstract
This paper concentrates on the batch internal mixing process and examines methods of modelling performance and of characterising the processing behaviour of mixed rubber compounds. Rheological and crosslinking measurements are employed to characterise the mixed compound and empirical multifactor modelling, based on factorial experiment design methods, is used to relate mixed compound properties to mixing treatment. A method of closed-loop control of state-of-mix via rotor torque monitoring is presented and its application and limitations discussed. Problems and progress in fundamental modelling of the batch internal mixing process are also reviewed, with particular emphasis on the finite element method.
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