Free radical suspension polymerization kinetics of styrene up to high conversion

N. Tefera Shibeshi, Günther Weickert, Robert Bloodworth, Johannes Schweer

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    Abstract

    Styrene was polymerized using different amounts of azoisobutyronitrile as initiator at temperatures of 70°C, 75°C and 80°C in suspension. The course of reaction up to almost complete conversion was modeled within a classical kinetic framework. Optimal simultaneous descriptions of both conversion and average degree of polymerization data were possible using two sets of values for the variation of the overall termination rate coefficient kt with conversion. One explanation for this is that kt is chain length dependent. Evidence for this necessity was derived by considering all kinetic parameters, except the termination rate coefficient, as reliable absolute values.
    Original languageEnglish
    Pages (from-to)3067-3085
    Number of pages19
    JournalMacromolecular chemistry
    Volume195
    Issue number9
    DOIs
    Publication statusPublished - 1994

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