This work describes a study of functionalization of ethylene polymers with diethyl maleate (DEM) initiated by dicumyl peroxide (DCP). The functionalization degree (FD) has been determined by FT-IR and NMR spectroscopy and through comparison with reference mixtures of the same polyethylenes with poly(diethyl fumarate). A good linear correlation was obtained between the ratio A1/A2 (where A1 and A2 are the integrated areas of the vibrational bands at 1738 and 1460 cm(-1) respectively) and the content of grafted 2-(diethyl succinate) groups. The data obtained show that in all cases the FD is appreciably affected by the amount of DEM, DCP and by the DCP/DEM ratio, thus allowing one to devise experiments aimed at controlled chemical modifications and to propose a reasonable reaction mechanism.
Chemical reactions affecting the free-radical grafting of diethyl maleate onto ethylene polymers
RUGGERI, GIACOMO;
1997-01-01
Abstract
This work describes a study of functionalization of ethylene polymers with diethyl maleate (DEM) initiated by dicumyl peroxide (DCP). The functionalization degree (FD) has been determined by FT-IR and NMR spectroscopy and through comparison with reference mixtures of the same polyethylenes with poly(diethyl fumarate). A good linear correlation was obtained between the ratio A1/A2 (where A1 and A2 are the integrated areas of the vibrational bands at 1738 and 1460 cm(-1) respectively) and the content of grafted 2-(diethyl succinate) groups. The data obtained show that in all cases the FD is appreciably affected by the amount of DEM, DCP and by the DCP/DEM ratio, thus allowing one to devise experiments aimed at controlled chemical modifications and to propose a reasonable reaction mechanism.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
