Nitroxide-Mediated Free-Radical Polymerization of Styrene: Experimental and Theoretical Study

SPIES, C.; VELASQUEZ, N.; ALVARADO, G.; LUCIANI, C. V.; ESTENOZ, D. A.; OLIVA, H. M.; MEIRA, G. R.

Montreal (Canadá),

Congreso; 8th. World Congress of Chemical Engineering (http://www.wcce8.org/ ); 2009

Congreso Mundial de Ing Qca

A bimolecular and nitroxide-mediated free-radical polymerization (NMRP) of styrene is theoretically and experimentally investigated. The reagents were styrene, 4-hydroxy-2,2,6,6-tetramethylpiperidine-N-oxyl (OH-TEMPO) as nitroxide mediator, and benzoyl peroxide (BPO) as chemical initiator. The measurements included the monomer conversion and molecular weight distribution (MWD) of the generated polyalcoxyamine. A mathematical model was developed by extension of the model by Belicanta-Ximenes et al. (2007). It calculates the evolution of monomer conversion, and the MWDs of the 3 PS fractions (dormant, dead, and living). These model predictions are important for improving the recipe and reaction control for minimizing polydispersity and the fraction of dead polymer. et al. (2007). It calculates the evolution of monomer conversion, and the MWDs of the 3 PS fractions (dormant, dead, and living). These model predictions are important for improving the recipe and reaction control for minimizing polydispersity and the fraction of dead polymer.