Community Research and Development Information Service - CORDIS

Improved microreactor

An improved micro reactor set-up that enables in situ optical observations of a single polymer particle during its growth is developed. The optical microscopy is used for direct measurement of polymer growth in gas-phase ethylene polymerization and ethylene/1-hexene copolymerization with prepolymerized Ziegler-Natta and supported metallocene catalysts. Different experiments were performed on a particle level to achieve better understanding of the catalyst performance, particle growth, fragmentation process, and the change in surface morphology during the particle growth.

It was found that performing such experiments and under industrial conditions is quite possible showing good reproducibility and high activity of the two catalyst used. Shape replication of the two catalysts was observed. Furthermore, it was proved that catalyst particles with the same size and under the same conditions show different activities. Moreover, due to catalyst/polymer particle fragmentation, it was found that this fragmentation led to formation of sub-grains, which were kept attached to the big particle.

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Reported by

UNIVERSITY OF TWENTE
Industrial Polymerization Processes, Faculty of Science and Technology ,University of Twente ,P.O. Box 217
7500 AE ENSCHEDE
Niger
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