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 materiabúsqueda de artículos
Home Pagelista alfabética de revistas  

Servicios Personalizados

Revista

Articulo

Indicadores

Links relacionados

Compartir


Boletín de la Sociedad Chilena de Química

versión impresa ISSN 0366-1644

Resumen

CATALAN, R.; NEIRA, A.  y  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

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

        · resumen en Español     · texto en Español

 

Creative Commons License Todo el contenido de esta revista, excepto dónde está identificado, está bajo una Licencia Creative Commons