SciELO - Scientific Electronic Library Online

 
vol.47 número1CARACTERIZACION DEL CURADO DE RESINAS UREA FORMALDEHIDO POR CALORIMETRÍA DIFERENCIAL DE BARRIDO (DSC)NEW SYNTHESIS AND CHARACTERIZATION OF THE SODIUM 3- N-ACETYLAMINO-2,4,6-TRIIODOBENZOATE: ANTIBACTERIAL ACTIVITY EVALUATION índice de autoresíndice de assuntospesquisa de artigos
Home Pagelista alfabética de periódicos  

Serviços Personalizados

Journal

Artigo

Indicadores

Links relacionados

Compartilhar


Boletín de la Sociedad Chilena de Química

versão impressa ISSN 0366-1644

Resumo

CATALAN, R.; NEIRA, A.  e  RIVAS, B. L.. STUDY OF GRAFT COPOLYMERIZATION ON SECONDARY CELLULOSIC FIBER WITH ACRYLONITRILE. Bol. Soc. Chil. Quím. [online]. 2002, vol.47, n.1, pp.39-47. ISSN 0366-1644.  http://dx.doi.org/10.4067/S0366-16442002000100008.

Graft copolymers of acrylonitrile on secondary cellulosic fiber were synthesized in aqueous medium by the Fe+2-hydrogen peroxide system as initiator. Grafting cellulosic xanthogenate were also prepared. The graft copolymers were characterized by elemental analysis, FT-IR spectroscopy, thermogravimetric analysis and scanning electron microscopy. The following parameters of copolymerization were studied: cellulose: acrylonitrile ratio, concentration of Fe+2-H2O2, pH, temperature and time of reaction. Their effects were also discussed. Grafting percentages higher than 85% were obtained in the best condition of the reaction. The obtained fibrous products were coloured or white, with a compact association of fibers. These products showed higher thermal stability than that of the secondary cellulosic fiber

Palavras-chave : secondary cellulosic fiber; graft copolymerization; acrylonitrile; iron(II)-hydrogen peroxide system; xanthation; grafting percentage.

        · resumo em Espanhol     · texto em Espanhol

 

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