SciELO - Scientific Electronic Library Online

 
vol.46 número2VOLTAMMETRIC DETERMINATION OF MELATONIN AND PYRIDOXINE (VITAMIN B6) IN TABLETSMEDICINAL CHEMISTRY EN EL DESARROLLO DE LOS PUEBLOS, BIODIVERSIDAD Y PRODUCTOS NATURALES 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

MARTINEZ, FRANCISCO; NECULQUEO, GLORIA; TORRES, MANUEL  y  OLEA, ANDRÉS. MONOESTERIFICATION OF STYRENE-MALEIC ANHYDRIDE COPOLYMERS WITH ALIPHATIC ALCOHOLS. Bol. Soc. Chil. Quím. [online]. 2001, vol.46, n.2, pp.137-141. ISSN 0366-1644.  http://dx.doi.org/10.4067/S0366-16442001000200006.

Maleic anhydride - styrene copolymers were synthesized in acetone-toluene solution at 60° C by azo-bisisobutironitrile. The copolymers were characterized by Gel Permeation Chromatography and Differential Scanning Calorimetry. The monoesterification of the maleic anhydride-styrene copolymers was carried out with methyl, n-propyl, n-butyl, n-hexyl, n-octyl and n-decyl alcohol in tetrahydrofuran solution at 65°C catalyzed by 4-dimethylaminopyridine. The esterification degree of the copolymers has been determined by FT-IR and ranged between 68-85%. An increasing reaction rate was observed with increasing alcohol chain length. The glass transition temperature of the monoesterified copolymers were also determined and ranged from 136-242°C for n-decanol and methanol copolymer respectively

Palabras clave : maleic anhydride-styrene; copolymers; esterification.

        · resumen en Español     · texto en Inglés

 

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