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On-Line Calorimetry in the Ethylene Coordination Polymerization

Published online by Cambridge University Press:  06 February 2014

José R. Infante-Martínez ,
Enrique Saldívar-Guerra ,
Odilia Pérez-Camacho ,
Víctor Comparán-Padilla  and
Maricela García-Zamora
José R. Infante-Martínez
Affiliation:
Centro de Investigación en Química Aplicada, Blvd. Enrique Reyna #140, Saltillo, Coahuila, 25294 México
Enrique Saldívar-Guerra
Affiliation:
Centro de Investigación en Química Aplicada, Blvd. Enrique Reyna #140, Saltillo, Coahuila, 25294 México
Odilia Pérez-Camacho
Affiliation:
Centro de Investigación en Química Aplicada, Blvd. Enrique Reyna #140, Saltillo, Coahuila, 25294 México
Víctor Comparán-Padilla
Affiliation:
Centro de Investigación en Química Aplicada, Blvd. Enrique Reyna #140, Saltillo, Coahuila, 25294 México
Maricela García-Zamora
Affiliation:
Centro de Investigación en Química Aplicada, Blvd. Enrique Reyna #140, Saltillo, Coahuila, 25294 México
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Abstract

The kinetic performance of metallocene type catalysts as well as their instantaneous activity is determined on line by two independent methods in the semi-batch polymerization of ethylene via metallocenes. On the basis of first-principles, both methods are described and guidelines for their implementation at a laboratory scale reactor are offered. Polymerization tests were conducted with two heterogenized metallocene catalysts showing that the direct method (based on ethylene flow measurement) and also the calorimetric method (based on energy balances) reported equivalent high quality information. The calorimetric method here developed can be readily used by the chemical practitioner as the notions and tools required for its implantation are easily grasped. It is noted that the calorimetric method has the advantage of requiring a low cost instrumentation (only thermocouples) whereas the direct method needs a relatively more sophisticated equipment (mass flow meter).

Keywords

calorimetrypolymerizationkinetics
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1613: Symposium 4D – New Trends in Polymer Chemistry and Characterization-2013 , 2014 , pp. 103 - 108
Copyright
Copyright © Materials Research Society 2014 

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References

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