Article

EFFECTS OF HYDROGEN AND TEMPERATURE ON KINETICS AND MORPHOLOGY OF PROPYLENE POLYMERIZATION

Authors:
Bahareh Raisi at Concordia University
Bahareh Raisi
Paolo Ferrari
Paolo Ferrari
Paolo Ferrari
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Gianni Pennini
Gianni Pennini
Gianni Pennini
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Abstract

In an autoclave reactor, propylene polymerization was carried out in slurry phase using an industrial TiCl 4 /Phthalate/MgCl 2 catalyst system. Polymerization kinetic profiles were obtained during reaction time. Effects of some process parameters like hydrogen concentration and polymerization temperature, on reaction kinetics, polymerization performance, polypropylene morphology and some important properties of produced polymer were investigated. Reaction and deactivation rates are strongly influenced by hydrogen amount and polymerization temperature. The final properties and morphology of the achieved polymers are correspondingly affected too. Initial polymerization rate is the crucial factor in the development of the polymer particle morphology. Higher polymerization temperature and hydrogen concentration mainly increase the initial polymerization rate. When this rate is high, the particle will not be able to replicate properly the shape of catalyst particle, and irregular shaped surface structures will form, with high porosity, and low values for bulk density.

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