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Stereoregular and Bernoullian copolymerization of styrene and ethylene by bridged metallocene catalysts
Author(s) -
Arai Toru,
Ohtsu Toshiaki,
Suzuki Shigeru
Publication year - 1998
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/(sici)1521-3927(19980601)19:6<327::aid-marc327>3.0.co;2-g
Subject(s) - copolymer , tacticity , metallocene , styrene , polymer chemistry , materials science , ethylene , post metallocene catalyst , catalysis , melting point , zirconium , polymerization , polymer , chemistry , organic chemistry , composite material , metallurgy
A stereoregular and Bernoullian copolymer of styrene and ethylene was produced by the catalyst system of rac ‐[isopropylidenebis(1‐indenyl)]zirconium dichloride and MAO. This catalyst system yields a high molecular weight copolymer with good activity at 50°C. The copolymer consists of Et‐Et, St‐Et, and head to tail St‐St sequences and has a highly isotactic Et‐St alternating sequence. This copolymer shows a melting point (80 – 110°C), due to the isotactic alternating sequence.