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Studies on the polymerization of ethylene using a high‐yield MgCl 2 ‐supported titanium catalyst, 3 . Chemical composition of the standard system and its alterations
Author(s) -
Fuhrmann Hans,
Strübing Brigitte
Publication year - 1994
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.1994.021950121
Subject(s) - catalysis , chemistry , alkyl , polymerization , ethylene , polymer chemistry , polymer , titanium , yield (engineering) , titration , halide , organic chemistry , materials science , metallurgy
Middle‐range n ‐alkyl chlorides are the most suitable components among a variety of tested alkyl halides in the preparation process of the highly active Ti‐Mg catalyst MTK ST . A material balance of the initial components RCl, THF and CCl 4 revealed the formation of oligomers, chloro‐containing telomers and poly‐THF apart from low‐molecular side products. The former are important modifiers of the suspension catalyst and exert a positive influence on catalyst activity and polymer properties, as was shown in the polymerization of ethylene. Schlenk equilibrium and extent of Wurtz type coupling in the Grignard synthesis step, which have been evaluated by titration of RMg bonds and Cl analysis of both the liquid and solid phase of the catalyst, predetermine the quality of the catalyst being formed.