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Contributions to the Experimental Investigation of the Nascent Polymerisation of Ethylene on Supported Catalysts, 1
Author(s) -
Di Martino Audrey,
Weickert Guenter,
McKenna Timothy F. L.
Publication year - 2007
Publication title -
macromolecular reaction engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.37
H-Index - 32
eISSN - 1862-8338
pISSN - 1862-832X
DOI - 10.1002/mren.200600013
Subject(s) - natta , ethylene , crystallinity , polymerization , catalysis , polymer chemistry , polymer , kinetics , ziegler–natta catalyst , materials science , fragmentation (computing) , chemistry , chemical engineering , organic chemistry , crystallography , physics , operating system , quantum mechanics , computer science , engineering
A detailed investigation of the kinetics, morphology and polymer properties observed during the polymerisation of ethylene on a Ziegler‐Natta catalyst at very short times (t ≥ 40 ms) in a novel, quenched‐flow reactor is presented. It was found that for times shorter than a tenth of a second, the observed rate of polymerisation was significantly higher than expected, and that the crystallinity of the nascent ethylene homopolymer was of the order of 25 to 30% – much lower than expected. Evidence is presented that shows that fragmentation is essentially complete in a small fraction of a second.
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