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The influence of the diluent system on the porous structure formation of copolymers based on 2-vinylpyridine and divinylbenzene. Diluent system. III. heptane/methylethylketone

Authors

  • Cosme Tadeu L. Luz,

    1. Instituto de Engenharia Nuclear/CNEN, Rio de Janeiro, RJ, Brasil
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  • Fernanda M. B. Coutinho

    Corresponding author
    1. Instituto de Macromoléculas Professora Eloisa Mano/UFRJ P.O. Box 68525, 21945-970, Rio de Janeiro, RJ, Brasil
    2. Departamento de Processos Químicos, IQ/UERJ, Rio de Janeiro, RJ, Brasil
    • Instituto de Macromoléculas Professora Eloisa Mano/UFRJ P.O. Box 68525, 21945-970, Rio de Janeiro, RJ, Brasil
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Abstract

The effects of the diluent mixture's composition and crosslinking degree [divinylbenzene (DVB)] on the porous characteristics of the anion-exchange resins based on 2-vinylpyridine (2VP) and DVB, synthesized by suspension polymerization, in the presence of a diluent mixture constituted of heptane (HEP) and methyl ethyl ketone (MEK) at different proportions, were evaluated. The resins were characterized by mercury porosimetry, nitrogen adsorption (Brunauer–Emmett–Teller (BET) method surface area determination), apparent density, and swelling in methanol. The optical appearance of the copolymer beads was examined by optical microscopy. It was found that the development of porosity was attained whenever the content of methyl ethyl ketone in the diluent mixture was increased for all DVB contents employed. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 91: 666–669, 2004

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