Influence of CO2 on ultrasound-induced polymerizations in high-pressure fluids

M.W.A. Kuijpers, L.J.M. Jacobs, M.F. Kemmere, J.T.F. Keurentjes

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    19 Citations (Scopus)


    A strong viscosity increase upon polymerization hinders cavitation and subsequent radical formation during an ultrasound-induced bulk polymerization. Ultrasound-induced radical polymerizations of methyl methacrylate (MMA) have been performed in CO2-expanded MMA, as well as in bulk MMA. For this purpose, the phase behavior of CO2/MMA systems has been determined. With temperature oscillation calorimetry, the influence of CO2 on the viscosity and on the reaction kinetics of ultrasound-induced polymerizations of MMA has been studied. In contrast to polymerizations in bulk, this technique shows that a low viscosity is maintained during polymerization reactions in CO2-expanded MMA. As a consequence, a constant or even increasing polymerization rate is observed when pressurized CO2 is applied. © 2005 American Institute of Chemical Engineers AIChE J, 2005
    Original languageEnglish
    Pages (from-to)1726-1732
    JournalAIChE Journal
    Issue number6
    Publication statusPublished - 2005


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