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.