ABSTRACT:Polymeric supports based on divinylbenzene (DVB) were prepared by aqueous suspension polymerization in presence or absence of styrene (S), using toluene and n-heptane as diluents of the monomers. Poly(S-DVB) and poly(DVB) were sulfonated with sulfuric acid in presence of 1,2-dichloroethane. The influence of the morphological structure of the supports and as a consequence of the catalyst on the esterification reaction of acetic acid with n-butanol was evaluated.
Diferentes suportes poliméricos à base de estireno (S) e divinilbenzeno (DVB) foram sintetizados e suas morfologias caracterizadas por microscopia óptica e eletrônica de varredura. Foram preparados e caracterizados catalisadores sulfônicos a partir desses suportes e suas atividades catalíticas foram avaliadas na transesterificação de óleo vegetal com metanol. Os resultados obtidos com esses catalisadores foram comparados com os produzidos com uma resina sulfônica comercial. Verificou-se que os catalisadores sintetizados neste trabalho apresentaram desempenhos próximos ao da resina comercial.
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