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Catalytic Polymerization of Liquid Propylene: Effect of Low-Yield Hexene Prepolymerization on Kinetics and Morphology

✍ Scribed by Makarand S. Pimplapure; Günter Weickert

Book ID
102498260
Publisher
John Wiley and Sons
Year
2005
Tongue
English
Weight
269 KB
Volume
26
Category
Article
ISSN
1022-1336

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✦ Synopsis

Abstract

Summary: A Ziegler‐Natta‐catalyst was used in ultra low‐yield slurry prepolymerization followed by liquid propylene (main) polymerizations. Complete catalyst disintegration down to 1.5–2 µm particle size is observed at prepolymerization yields of 10 g per g cat. The initial (main) polymerization rate increased up to 55% and the final average particle diameter can be controlled between 50 and 1 500 µm at main polymerization yields of 20 kg PP per g cat · hr^−1^. Tension generation within the particle and the absence of a polymer layer explains these results.

Surface SEM. Top: Catalyst surface covered with polyhexene. Bottom: Cracks on catalyst surface after washing with hexane.

imageSurface SEM. Top: Catalyst surface covered with polyhexene. Bottom: Cracks on catalyst surface after washing with hexane.

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