Styrene And Divinylbenzene Copolymers
Mostrando 1-8 de 8 artigos, teses e dissertações.
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1. Removal of Phenol from aqueous solutions by Polymeric composites containing Ni and Co particles
Magnetic composites have a wide range of potential technological applications; however the evaluation of this material for extraction of phenolic compounds has not been sufficiently studied. Due to its high toxicity and solubility the removal of phenolic compounds from the aquatic environments has critical importance. In this work polymeric composites were p
Polímeros. Publicado em: 25/10/2013
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2. A study of the initiator concentration’s effect on styrene-divinylbenzene polymerization with iron particles
This paper describes the preparation of magnetic copolymer obtained from suspension polymerization of styrene (Sty) and divinylbenzene (DVB) in the presence of iron particles treated and not treated with oleic acid. The magnetic copolymers were characterized according to their morphology, particle size distribution and magnetic properties. The results show t
Polímeros. Publicado em: 13/12/2011
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3. Preparação de copolímeros à base de 2-vinilpiridina com propriedades bactericidas
We report the development of two copolymers based on 2-vinylpyridine, styrene and divinylbenzene (2Vpy-Sty-DVB) with different porosity degrees. The copolymers were subsequently quaternized with methyl iodide. To prepare charge transfer complexes, the unmodified copolymers and their derivatives quaternized with methyl iodine were impregnated with iodine. The
Química Nova. Publicado em: 2011
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4. Preparation and bactericidal effect of composites based on crosslinked copolymers containing silver nanoparticles
Commercial copolymers based on styrene and divinylbenzene containing sulfonic acid groups were used as support for the incorporation of silver nanoparticles. These nanoparticles were obtained in situ by the reduction of Ag+ by using hydroxylamine in the presence of a protective agent. These materials were characterized with determination of the silver conten
Polímeros. Publicado em: 13/08/2010
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5. Síntese, caracterização e avaliação da capacidade bactericida de copolímeros à base de 2-vinilpiridina funcionalizados / Synthesis, characterization and evaluation of the bactericidal capacity of copolymers based on 2-vinylpyridine functionalized
Neste trabalho, dois copolímeros à base de 2-vinilpiridina (2Vpy), estireno (Sty) e divinilbenzeno (DVB) foram sintetizados empregando a técnica de polimerização em suspensão aquosa via radical livre. Os copolímeros com diferentes características morfológicas foram preparados variando a composição da mistura diluente, constituída por tolueno e n-
Publicado em: 2009
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6. Effect of some synthesis parameters in the production of styrene and divinylbenzene based copolymers with magnetic properties / Efeito de alguns parâmetros de síntese na obtenção de copolímeros à base de estireno e divinilbenzeno com propriedades magnéticas
Nesta dissertação, microesferas poliméricas com propriedades magnéticas à base de estireno e divinilbenzeno foram sintetizadas por polimerização em suspensão. O material utilizado para conferir as propriedades magnéticas foi magnetita sintetizada em laboratório. Foram estudados os efeitos da modificação da magnetita com ácido oleico, da velocida
Publicado em: 2008
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7. Investigação experimental da copolimerização de estireno divinilbenzeno (DVB) via radical livre controlada por radicais nitroxido (NMRP) / Nitroxide mediated radical copolymerization of styrene and divinylbenzene (DVB)
Living free radical polymerization, also known as "pseudo-living radical polymerization" has received more and more attention as a technique for the production of polymers with micro structure highly controlled (narrow molecular weights distributions and polydispersity index close to one). Conventional routes to obtain polymer like this have been ionic polym
Publicado em: 2008
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8. Homopolimerização e copolimerização via radical livre controlada por radicais nitroxidos / Nitroxide mediated radical homopolymerization and copolymerization
Controlled/living radical polymerization (CLRP) is one of the most rapidly developing areas of polymer science and engineering. The ability to prepare well-defined block and graft copolymers, gradient and periodic copolymers, stars, combs, polymer networks, end-functional polymers and many other materials by free-radical mechanisms is perhaps the main reason
Publicado em: 2008