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Modeling the nucleation stage during batch emulsion polymerization

Authors

  • Montserrat Fortuny,

    1. Laboratory for the Chemistry and Processes of Polymerization (LCPP–CNRS), Ecole Supérieure de Chimie, Physique et Electronique de Lyon (ESCPE), 69616 Villeurbanne Cedex, France
    Current affiliation:
    1. Instituto de Tecnologia e Pesquisa (ITP), Universidade Tiradentes (UNIT), Aracaju, Brazil
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  • Christian Graillat,

    1. Laboratory for the Chemistry and Processes of Polymerization (LCPP–CNRS), Ecole Supérieure de Chimie, Physique et Electronique de Lyon (ESCPE), 69616 Villeurbanne Cedex, France
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  • Timothy F. McKenna,

    Corresponding author
    1. Laboratory for the Chemistry and Processes of Polymerization (LCPP–CNRS), Ecole Supérieure de Chimie, Physique et Electronique de Lyon (ESCPE), 69616 Villeurbanne Cedex, France
    • Laboratory for the Chemistry and Processes of Polymerization (LCPP–CNRS), Ecole Supérieure de Chimie, Physique et Electronique de Lyon (ESCPE), 69616 Villeurbanne Cedex, France
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  • Pedro H. H. Araújo,

    1. Chemical Engineering Program (EQA), CTC, Federal University of Santa Catarina (UFSC), Florianópolis, Brazil
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  • José C. Pinto

    1. Programa de Engenharia Quimica/COPPE, Universidade Federal do Rio de Janeiro, Rio de Janeiro-21945-970, RJ Brazil
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Abstract

A model based on independently validated stabilization and rate data is used to quantify the rate of formation of particles during the dynamic nucleation stage of a batch emulsion polymerization reaction. Population balance equations (PBEs) that combine kinetic data validated in the absence of coagulation and a DLVO stability model with parameters validated in the absence of reaction were used to account for both micellar and homogeneous nucleation, as well as particle stabilization and growth. The model was tested in different polymerization systems at different ionic strengths. It is shown that a large number of moderately short-lived particles are formed during the early stages of nucleation and that they contribute to an accelerated rate of polymerization for a short period of time before coagulating onto large structures in the reactor. © 2005 American Institute of Chemical Engineers AIChE J, 2005

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