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Este artigo avalia o emprego de copolimeros porosos (a base de estireno-STY e vinilpiridina-VP, reticulados com divinilbenzeno-DVB) como adsorventes de 4-nitrofenol de solucoes aquosas. Os copolimeros foram sintetizados atraves de polimerizacao em suspensao aquosa via radical livre na presenca de heptano (HEP) e tolueno (TOL) em diferentes proporcoes como agentes porogenicos. As unidades de VP nos copolimeros foram modificadas quimicamente pela adicao eletrofilica de monomeros vinilicos funcionalizados (acrilonitrila). Os copolimeros quaternizados foram caracterizados por espectrofotometria na regiao do infravermelho (FTIR), analise elementar (CHN), microscopia otica (OM) e microscopia eletronica de varredura (SEM). This article aims to evaluate porous copolymers (based on styrene-STY and vinylpyridineVP, cross-linked with divinylbenzene-DVB) as adsorbents for 4-nitrophenol from aqueous solution. These copolymers were synthesized by suspension polymerizations in the presence of heptane (HEP) and toluene (TOL) in different proportions as porogenic agents. The VP units of the copolymers were chemically modified by the addition of the electrophilic ethylenic compound (acrylonitrile). The quaternized copolymers were characterized by infrared spectrometry (FTIR), elemental analysis (CHN), optical microscopy (OM) and scanning electron microscopy (SEM).

Quaternization reaction of 2-vinylpyridine and 4-vinylpyridine network copolymers for 4-nitrophenol adsorption