Terminal and penultimate reactivity ratios in single-site Ethene/Propene copolymerizations: comparison of kakugo and direct peak methods

F.G. Karssenberg, B. Wang, N. Friederichs, V.B.F. Mathot

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    10 Citations (Scopus)

    Abstract

    he original, first-order Kakugo method is extended to find second-order reactivity ratios of homogeneous catalysts in ethene/propene copolymerizations based on triad fractions. Subsequently, the first- and second-order reactivity ratios of eight Si-bridged C2-symmetric ansa-zirconocenes or hafnocenes, as obtained by the Direct Peak method, are used to compare with the Kakugo methods. From the results it is clear that the second-order methods give better descriptions than the first-order methods. Only the results of the second-order Direct Peak method are statistically justified, reflecting reliabilities >99.5%. Though the Direct Peak method in all cases gives the most reliable reactivity ratios, the second-order Kakugo method turns out to be a practical tool to find estimates.
    Original languageEnglish
    Pages (from-to)1675-1683
    JournalMacromolecular Chemistry and Physics
    Volume206
    Issue number16
    DOIs
    Publication statusPublished - 2005

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