A contribution to the study of the catalytic action of clays on the polymerization of styrene: II. Reaction mechanism

D. Njopwouo, G. Roques, R. Wandji
1988 Clay minerals  
The study of 13C NMR spectra of polystyrene thermally obtained on clays shows that thermal polymerization of styrene on these minerals proceeds by two parallel reaction mechanisms: the radical mechanism due to the thermal effect, and the cationic mechanism in which the initiatory cation H+ is provided by the clay. The latter mechanism, accelerated by increase in temperature, becomes more important as the clay content increases in the reaction medium. Otherwise, the thermal polymerization on
more » ... s is accompanied by the hydrogenation of some α carbons of the polystyrene molecule and the oxidation of certain aromatic carbons.
doi:10.1180/claymin.1988.023.1.04 fatcat:bzryme75ibgurfnsl74534k7um