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Video Microscopy for Fast Screening of Polymerization Catalysts

✍ Scribed by M. Abboud; K. Kallio; K.-H. Reichert

Publisher
John Wiley and Sons
Year
2004
Tongue
English
Weight
146 KB
Volume
27
Category
Article
ISSN
0930-7516

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✦ Synopsis

Abstract

Video microscopy has been used as an effective tool for fast screening of six different metallocene/MAO supported catalyst samples. The different techniques employed for supporting the metallocene on silica gels can have an influence on the overall catalyst activity and on the activity of single catalyst particles. The kinetics of gas‐phase polymerization of ethylene with supported metallocene/MAO catalysts can be modeled by using a simple reaction scheme and neglecting mass and heat transport effects.

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## Abstract Methanol, in combination with a non‐ionic phosphazene base, was used to initiate the polymerization of octamethylcyclotetrasiloxane. In bulk, an instantaneous and large increase in viscosity was observed upon addition of the initiator. In toluene solution, the equilibrium state was reac