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Propene polymerization catalyzed over MCM‐41 and VPI‐5‐supported Et(ind) 2 ZrCl 2 catalysts
Author(s) -
Ko Young Soo,
Han Taek Kyu,
Park Je Woo,
Woo Seong Ihl
Publication year - 1996
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.1996.030171101
Subject(s) - metallocene , propene , methylaluminoxane , polymerization , polymer chemistry , catalysis , molecular sieve , materials science , melting point , chemistry , polymer , organic chemistry , composite material
Et(ind) 2 ZrCl 2 (C 2 H 5 (indenyl) 2 ZrCl 2 ) confined inside regular pores of molecular sieves MCM‐41 and VPI‐5 were prepared and used to polymerize propene with high activity. Stereoregularity, melting point and molecular weight of polypropene obtained were increased and the polymerization behavior was quite different from that prepared with homogeneous Et(ind) 2 ZrCl 2 . The small, regular and cylindrical pores of MCM‐41 and VPI‐5 suppress the formation of inactive binuclear complexes between metallocene and metallocene, or between metallocene and methylaluminoxane, resulting in stable active sites and high activity in propene polymerization.