SciELO - Scientific Electronic Library Online

 
vol.22 número3Síntese e caracterização de copolímeros de propeno com 1-hexeno e 1,5-hexadienoInfluência do teor de polipropileno modificado com anidrido maleico nas propriedades do nanocompósito PP/EPDM/argila organofílica índice de autoresíndice de assuntospesquisa de artigos
Home Pagelista alfabética de periódicos  

Serviços Personalizados

Journal

Artigo

Indicadores

Links relacionados

Compartilhar


Polímeros

versão impressa ISSN 0104-1428

Resumo

COSTA, Cristiane N. et al. Synthesis and characterization of copolymers based on methyl methacrylate and divinylbenzene with magnetic properties. Polímeros [online]. 2012, vol.22, n.3, pp.260-266.  Epub 21-Jun-2012. ISSN 0104-1428.  http://dx.doi.org/10.1590/S0104-14282012005000042.

In this work, copolymers based on methyl methacrylate and divinylbenzene containing iron with magnetic properties were produced using the suspension polymerization method. An investigation was performed of the effect from the concentration of iron added to the polymerization, the MMA/DVB molar ratio in the copolymer formation, type of suspension agent and stirring speed on the synthesis of the copolymers. The copolymers morphology, thermal stability, contents of embedded iron, particle size distribution, magnetic properties, surface area, volume and pore size were evaluated. Polymeric microspheres with magnetic properties were successfully obtained. These materials showed good control of the spherical shape and agglomeration of iron particles under the surface of the microsphere. The analysis of magnetic properties pointed to materials with no hysteresis loops, thus being close to a material with superparamagnetic properties with saturation magnetization between 8.0 and 13.0 emu.g-1.

Palavras-chave : Copolymer of methyl methacrylate and divinylbenzene; magnetic properties; iron.

        · resumo em Português     · texto em Português     · Português ( pdf )

 

Creative Commons License Todo o conteúdo deste periódico, exceto onde está identificado, está licenciado sob uma Licença Creative Commons