Study on process parameters in metallocene polymerizations, I: Apparent viscosity and macro-scale mass transfer

Mikko Lahti*, Jari Koivumäki, Jukka V. Seppälä

*Corresponding author for this work

    Research output: Contribution to journalArticleScientificpeer-review

    15 Citations (Scopus)

    Abstract

    A heat balance reaction calorimeter was used to obtain information about the most informative process parameters in polymerizations carried out with Et [Ind]2ZrCl2-methylaluminoxane catalyst. The viscosity of the reaction mixture was found to increase dramatically during the homopolymerization of ethylene, but it could be controlled through appropriate selection of the reaction mixture medium. The mass transfer between the gas and liquid phases was the rate-determining step for the polymerization when the reaction mixture-based Reynolds number was below 2.500. The limited mass transfer between the gas and liquid phases was caused by the intensive activity of the metallocene catalyst and the increased viscosity of the reaction mixture.

    Original languageEnglish
    Pages (from-to)139-153
    Number of pages15
    JournalAngewandte Makromolekulare Chemie
    Volume236
    Issue number1
    DOIs
    Publication statusPublished - Mar 1996
    MoE publication typeA1 Journal article-refereed

    Keywords

    • apparent viscosity
    • mass transfer
    • metallocene
    • process parameters

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