Effet de la temperature et de la concentration en monomere sur la cinetique de polymerisation du propene par catalyse ziegler-natta

The effects of monomer concentration and temperature on the kinetics of propene polymerization catalysed by δ titanium trichloride (TiCl₃· 1/3 AlCl₃) activated by diethylaluminium chloride have been studied. The study included variation of propene concentration from 0·2 mole/1 to bulk liquid at temperatures between 20 and 80°. Results are in agreement with a mechanism which includes a monomer chemisorption to form a transitory complex (absorption—desorption) and addition of the chemisorbed monomer to the polymer chain. It appears, contrary to the general belief, that addition would be fast compared with the setting up of the chemisorption equilibrium.