INTEC   05402
INSTITUTO DE DESARROLLO TECNOLOGICO PARA LA INDUSTRIA QUIMICA
Unidad Ejecutora - UE
artículos
Título:
Solution and Quasi-Bulk Copolymerization of Styrene and Methyl Methacrylate in the Presence of Polybutadiene: Mathematical Model
Autor/es:
GUTIERREZ, C. G.; ESTENOZ, D. A.; GUGLIOTTA, L. M.; VEGA, J. R.; MEIRA, G. R.
Revista:
JOURNAL OF APPLIED POLYMER SCIENCE
Editorial:
JOHN WILEY & SONS INC
Referencias:
Año: 2009
ISSN:
0021-8995
Resumen:
A mathematical model was developed for
simulating the batch copolymerization of styrene (St) and
methyl methacrylate (MMA) in the presence of polybutadiene
(PB). It was adjusted to the measurements of three
reactions carried out at 65C, with initial comonomers ratio
at the azeotropic condition, THF as solvent, and benzoyl peroxide
as initiator. The measurements included: (a) conversions
and grafting efficiencies by gravimetry; (b) molecular
weight distributions (MWDs) by size exclusion chromatography;
and (c) global mass fractions of St in the co- and terpolymer,
by UV-Vis spectroscopy. The model predicts the MWDs
of the three polymeric components of MBS: free St-MMA copolymer,
St-MMA-g-PB graft terpolymer (GT), and residual
PB. In addition, it predicts the bivariate chain length distributions
of the different GT topologies, with each topology characterized
by the number of branches per molecule.C, with initial comonomers ratio
at the azeotropic condition, THF as solvent, and benzoyl peroxide
as initiator. The measurements included: (a) conversions
and grafting efficiencies by gravimetry; (b) molecular
weight distributions (MWDs) by size exclusion chromatography;
and (c) global mass fractions of St in the co- and terpolymer,
by UV-Vis spectroscopy. The model predicts the MWDs
of the three polymeric components of MBS: free St-MMA copolymer,
St-MMA-g-PB graft terpolymer (GT), and residual
PB. In addition, it predicts the bivariate chain length distributions
of the different GT topologies, with each topology characterized
by the number of branches per molecule.g-PB graft terpolymer (GT), and residual
PB. In addition, it predicts the bivariate chain length distributions
of the different GT topologies, with each topology characterized
by the number of branches per molecule.