MONOESTERIFICATION OF STYRENE-MALEIC ANHYDRIDE COPOLYMERS WITH ALIPHATIC ALCOHOLS

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 carr...

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Bibliographic Details
Published in:Boletín de la Sociedad Chilena de Química 2001-06, Vol.46 (2), p.137-141
Main Authors: MARTINEZ, FRANCISCO, NECULQUEO, GLORIA, TORRES, MANUEL, OLEA, ANDRÉS
Format: Article
Language:English
Subjects:
CHEMISTRY, MULTIDISCIPLINARY
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Summary: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
ISSN:0366-1644
0366-1644
DOI:10.4067/S0366-16442001000200006