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Abstract
An adaptive calorimetric measurement of the overall monomer conversion, X(t), coupled with a non linear state estimator was used to monitor the emulsion copolymerization of Styrene/α-methylstyrene (AMS). Several batch and semi-batch experiments were performed with increasing AMS concentrations; and a model of the process was selected and validated. The non-linear observer is shown to provide reasonable estimates of the time variations of copolymer composition, and allows the estimation of the average number of radicals in the particles, n , using a typical emulsion polymerization model. Such estimates may be used in a model-based feedback control scheme aiming at optimising the final AMS content of the copolymer.
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