A method for the prediction of metallocene‐type catalyst activity in olefin (co)polymerisation reactions | Zendy

Pieters Paul J. J. | Zendy; van Beek Johannes A. M. | Zendy; van Tol Maurits F. H. | Zendy

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A method for the prediction of metallocene‐type catalyst activity in olefin (co)polymerisation reactions

Author(s) -

Pieters Paul J. J.,

van Beek Johannes A. M.,

van Tol Maurits F. H.

Publication year - 1995

Publication title -

macromolecular rapid communications

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.348

H-Index - 154

eISSN - 1521-3927

pISSN - 1022-1336

DOI - 10.1002/marc.1995.030160702

Subject(s) - methylaluminoxane , metallocene , hypsochromic shift , bathochromic shift , cationic polymerization , catalysis , polymer chemistry , polymerization , chemistry , photochemistry , materials science , organic chemistry , physics , quantum mechanics , fluorescence , polymer

The use of ultraviolet/visible spectroscopy (UV‐Vis) for the prediction of metallocene catalyst potential for the polymerisation of olefins is described. Upon addition of methylaluminoxane (MAO) to rac ‐[C 2 H 4 (1‐indenyl) 2 ZrCl 2 ] ([Al]/[Zr] = 200) the ligand‐to‐metal charge transfer band shows a hypsochromic shift while a bathochromic shift is observed when more MAO is added ([Al]/[Zr] = 2000). These shifts can be explained by assuming that methylation of the zirconocene by MAO occurs in the case of [Al]/[Zr] = 200 while a cationic complex, the active catalytic system, is formed upon addition of more MAO, e.g., [Al]/[Zr] = 2000.

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