Particle control of Ziegler–Natta catalysts based on TiCl3for propylene polymerization. Effect of prepolymerization

摘要

AbstractPrepolymerizations employing an extremely high stereospecific and high active catalyst based on TiCl3modified by di‐n‐butyl ether (DBE) were carried out with different monomers (styrene, propylene, hexene‐1, cyclopentadiene). The influence of prepolymerization on the morphology of polypropylene obtained with TiCl3catalyst was investigated. The catalyst was synthesized by TiCl4reduction in toluene solution with A1Et3·DBE complex. The polymer morphology was evaluated through optical and scanning electron microscopies and polymer bulk density and particle size distribution. © 1994 John WileySo